Here is how you refresh the expiration time for multiple cookies:
// get the cookie names
$keys=array_keys($_COOKIE);
// loop through all the cookies and update the exp. time
for ($i=0; $i<count($_COOKIE);$i++)
setcookie( $keys[$i], $_COOKIE[$keys[$i]], time()+3600);
you can use this in authentication validate file to keep the session up.
配列関数(array)
導入
これらの関数により様々な手法で配列にアクセスし、操作することが可能 になります。配列は、変数の組を保存、管理、操作する基本的な要素です。
通常の配列および多次元配列がサポートされており、ユーザが定義したり、 他の関数で作成することも可能です。いくつかのデータベース処理関数は、 データベースのクエリから配列を返しますし、いくつかの関数は配列を返 します。
PHPでの配列の実装や使用方法の詳細については、マニュアルの 配列に関する節を参照下 さい。 その他の配列の操作方法については、 配列演算子も 参照ください。
要件
外部ライブラリを必要としません。
インストール手順
PHP コアに含まれるため、 追加のインストール無しで使用できます。
実行時設定
設定ディレクティブは定義されていません。
リソース型
リソース型は定義されていません。
定義済み定数
以下の定数は、PHP コアに含まれており、常に利用可能です。
- CASE_LOWER (integer)
- CASE_LOWERは、 array_change_key_case()で使用され、 配列のキーを小文字に変換するために使用されます。小文字は、 array_change_key_case()のデフォルトのケースで もあります。
- CASE_UPPER (integer)
- CASE_UPPERは、 array_change_key_case()で使用され、配列のキー を大文字に変換するために使用されます。
ソース順のフラグ:
- SORT_ASC (integer)
- SORT_ASCは、 array_multisort()でソート順を昇順にするために 使用されます。
- SORT_DESC (integer) (integer)
- SORT_DESCは、 array_multisort()でソート順を降順にするために 使用されます。
ソート型のフラグ: 種々のソート関数で使用されます
参考
is_array(), explode(), implode(), split(), preg_split(), および join() も参照してください。
目次
- array_change_key_case — 配列のすべてのキーを変更する
- array_chunk — 配列を分割する
- array_combine — 一方の配列をキーとして、もう一方の配列を値として、ひとつの配列を生成する
- array_count_values — 配列の値の数を数える
- array_diff_assoc — 追加された添字の確認を含めて配列の差を計算する
- array_diff_key — キーを基準にして配列の差を計算する
- array_diff_uassoc — ユーザが指定したコールバック関数を利用し、 追加された添字の確認を含めて配列の差を計算する
- array_diff_ukey — キーを基準にし、コールバック関数を用いて配列の差を計算する
- array_diff — 配列の差を計算する
- array_fill_keys — キーを指定して、配列を値で埋める
- array_fill — 配列を指定した値で埋める
- array_filter — コールバック関数を使用して、配列の要素をフィルタリングする
- array_flip — 配列のキーと値を反転する
- array_intersect_assoc — 追加された添字の確認も含めて配列の共通項を確認する
- array_intersect_key — キーを基準にして配列の共通項を計算する
- array_intersect_uassoc — 追加された添字の確認も含め、コールバック関数を用いて 配列の共通項を確認する
- array_intersect_ukey — キーを基準にし、コールバック関数を用いて 配列の共通項を計算する
- array_intersect — 配列の共通項を計算する
- array_key_exists — 指定したキーまたは添字が配列にあるかどうかを調べる
- array_keys — 配列のキーをすべて返す
- array_map — 指定した配列の要素にコールバック関数を適用する
- array_merge_recursive — 二つ以上の配列を再帰的にマージする
- array_merge — ひとつまたは複数の配列をマージする
- array_multisort — 複数の多次元の配列をソートする
- array_pad — 指定長、指定した値で配列を埋める
- array_pop — 配列の末尾から要素を取り除く
- array_product — 配列の値の積を計算する
- array_push — 一つ以上の要素を配列の最後に追加する
- array_rand — 配列から一つ以上の要素をランダムに取得する
- array_reduce — コールバック関数を用いて配列を普通の値に変更することにより、 配列を再帰的に減らす
- array_reverse — 要素を逆順にした配列を返す
- array_search — 指定した値を配列で検索し、見つかった場合に対応するキーを返す
- array_shift — 配列の先頭から要素を一つ取り出す
- array_slice — 配列の一部を展開する
- array_splice — 配列の一部を削除し、他の要素で置換する
- array_sum — 配列の中の値の合計を計算する
- array_udiff_assoc — データの比較にコールバック関数を用い、 追加された添字の確認を含めて配列の差を計算する
- array_udiff_uassoc — データと添字の比較にコールバック関数を用い、 追加された添字の確認を含めて配列の差を計算する
- array_udiff — データの比較にコールバック関数を用い、配列の差を計算する
- array_uintersect_assoc — データの比較にコールバック関数を用い、 追加された添字の確認も含めて配列の共通項を計算する
- array_uintersect_uassoc — データと添字の比較にコールバック関数を用い、 追加された添字の確認も含めて配列の共通項を計算する
- array_uintersect — データの比較にコールバック関数を用い、配列の共通項を計算する
- array_unique — 配列から重複した値を削除する
- array_unshift — 一つ以上の要素を配列の最初に加える
- array_values — 配列の全ての値を返す
- array_walk_recursive — 配列の全ての要素に、ユーザー関数を再帰的に適用する
- array_walk — 配列の全ての要素にユーザ関数を適用する
- array — 配列を生成する
- arsort — 連想キーと要素との関係を維持しつつ配列を逆順にソートする
- asort — 連想キーと要素との関係を維持しつつ配列をソートする
- compact — 変数名とその値から配列を作成する
- count — 変数に含まれる要素、 あるいはオブジェクトに含まれるプロパティの数を数える
- current — 配列内の現在の要素を返す
- each — 配列から、次のキーと値のペアを返す
- end — 配列の内部ポインタを最終要素にセットする
- extract — 配列からシンボルテーブルに変数をインポートする
- in_array — 配列に値があるかチェックする
- key — 連想配列からキーを取り出す
- krsort — 配列をキーで逆順にソートする
- ksort — 配列をキーでソートする
- list — 配列と同様の形式で、複数の変数への代入を行う
- natcasesort — 大文字小文字を区別しない"自然順"アルゴリズムを用いて配列をソートする
- natsort — "自然順"アルゴリズムで配列をソートする
- next — 内部配列ポインタを進める
- pos — current のエイリアス
- prev — 内部の配列ポインタをひとつ前に戻す
- range — ある範囲の整数を有する配列を作成する
- reset — 配列の内部ポインタを先頭の要素にセットする
- rsort — 配列を逆順にソートする
- shuffle — 配列をシャッフルする
- sizeof — count のエイリアス
- sort — 配列をソートする
- uasort — ユーザー定義の比較関数で配列をソートし、連想インデックスを保持する
- uksort — ユーザー定義の比較関数を用いて、キーで配列をソートする
- usort — ユーザー定義の比較関数を使用して、配列を値でソートする
配列
yousefomar (a) yahoo dot com
29-Feb-2008 04:26
29-Feb-2008 04:26
ms419 at freezone dot co dot uk
15-Feb-2008 03:35
15-Feb-2008 03:35
This function takes an array, a key and a value. If the key is not an array, it acts just like $array[$key] =& $value; If the key is an array, it recurses in the array, creating nested arrays as necessary.
Example:
$array = array('A' => array('B' => 'phi'));
$key = array('A', 'Z');
$value = 'gamma';
arraySet($array, $key, $value);
$array should now be:
array('A' => array('B' => 'phi', 'C' => 'gamma'));
This is useful for constructing nested arrays from sets of filesystem paths (e.g. 'A/B/C') or structured variable names (e.g. 'A.B.C' or 'A[B][C]')
Example:
arraySet($array, preg_split('/\//', $path, -1, PREG_SPLIT_NO_EMPTY), $value);
function arraySet(array &$array, $key, &$value)
{
if (is_array($key)) {
$keyComponent = array_shift($key);
if (empty($key)) {
$array[$keyComponent] =& $value;
return;
}
if (!is_array($array[$keyComponent])) {
$array[$keyComponent] = array();
}
PHP_CodeSniffer_arraySet($array[$keyComponent], $key, $value);
return;
}
$array[$key] =& $value;
}
dennis at DONTSPAMME dot born05 dot nl
14-Feb-2008 12:22
14-Feb-2008 12:22
I haven't completely figured out when or why an array gets referenced or copied, but it gave me quite the headache..
So i wrote a function which recursively copies an array while preserving keys and also clones objects if encountered
<?php
/**
* make a recursive copy of an array
*
* @param array $aSource
* @return array copy of source array
*/
function array_copy ($aSource) {
// check if input is really an array
if (!is_array($aSource)) {
throw new Exception("Input is not an Array");
}
// initialize return array
$aRetAr = array();
// get array keys
$aKeys = array_keys($aSource);
// get array values
$aVals = array_values($aSource);
// loop through array and assign keys+values to new return array
for ($x=0;$x<count($aKeys);$x++) {
// clone if object
if (is_object($aVals[$x])) {
$aRetAr[$aKeys[$x]]=clone $aVals[$x];
// recursively add array
} elseif (is_array($aVals[$x])) {
$aRetAr[$aKeys[$x]]=array_copy ($aVals[$x]);
// assign just a plain scalar value
} else {
$aRetAr[$aKeys[$x]]=$aVals[$x];
}
}
return $aRetAr;
}
?>
I hope i can save someone else's aspirine with this ;)
csorfab at gmail dot com
06-Feb-2008 03:26
06-Feb-2008 03:26
Here's a function I wrote to combine the values in an array in all different ways, and which returns a two-dimensional array as a byref result.
E.g.
if called:
comb(array(1, 2, 3), $r);
then $r would be:
1 2 3
1 3 2
2 1 3
2 3 1
3 1 2
3 2 1
<?php
function comb($arr, &$rarr, $vtemp = array()){
foreach($arr as $key => $value){
$vtemp2 = $vtemp;
$vtemp2[] = $value;
$atemp = $arr;
unset($atemp[$key]);
if(count($atemp) > 0){
comb($atemp, $rarr, $vtemp2);
} else {
$t = array();
foreach($vtemp2 as $val){
$t[] = $val;
}
$rarr[] = $t;
}
}
}
?>
christian dot reinecke at web dot de
03-Feb-2008 06:12
03-Feb-2008 06:12
Here are two more functions handling string2array and access array by string. It's useful if you want to access an array in xpath-style, such as parse_ini_file return values with $process_sections = TRUE.
<?php
function createArrayByString($string, $separator, $value = NULL)
{
if (strlen($string) > 0) {
$splitter = explode($separator, $string);
$index = array_shift($splitter); // get first element
$function = __FUNCTION__;
return array($index => $function(implode($separator, $splitter), $separator, $value));
}
return $value;
}
function accessArrayByString($array, $string, $separator, $default = NULL)
{
if (!is_array($array)) {
return empty($string) ? $array : $default;
}
@list ($key, $rest) = explode($separator, $string, 2); // @ needed for last access
$function = __FUNCTION__;
return array_key_exists($key, $array)
? $function($array[$key], $rest, $separator, $default)
: $default;
}
$string = "one.two.three.four";
$separator = ".";
$array = createArrayByString($string, $separator, "standard value");
$return = accessArrayByString($array, $string, $separator, "element not found");
var_dump($array); // should return array("one" => array("two" => array("three" => array("four" => "standard value"))))
var_dump($return); // should return "standard value";
?>
change the function name to what ever you want, the recursive call uses __FUNCTION__ for re-call.
florian at egliselasauzaie dot fr
30-Jan-2008 07:09
30-Jan-2008 07:09
I've created a class which is comparable to a Vector in C++;
<?php
class Vector {
public $nb_elements;
public $liste;
public function Vector() {
$this->liste = array ();
$this->nb_elements = count($this->liste);
}
public function push_back($valeur) {
if (!empty ($valeur)) {
$this->liste[] = $valeur;
$this->nb_elements = count($this->liste);
return true;
} else {
return false;
}
}
public function insert_at($indice, $valeur) {
if ($indice > 0 && $indice < $this->nb_elements) {
for ($i = $this->nb_elements; $i != $indice; $i--) {
$this->liste[$i] = $this->liste[$i -1];
}
$this->liste[$indice] = $valeur;
$this->nb_elements = count($this->liste);
return true;
} else {
return false;
}
}
public function remove_at($indice) {
if ($indice > 0 && $indice < $this->nb_elements) {
for ($i = $indice; $i != $this->nb_elements - 1; $i++) {
$this->liste[$i] = $this->liste[$i +1];
}
array_pop($this->liste);
$this->nb_elements = count($this->liste);
return true;
} else {
return false;
}
}
public function pop() {
$value = array_pop($this->liste);
$this->nb_elements = count($this->liste);
return $value;
}
public function shift() {
$value = array_shift($this->liste);
$this->nb_elements = count($this->liste);
return true;
}
}
?>
really quick function
26-Jan-2008 05:37
26-Jan-2008 05:37
function array_flatten($a){ //flattens multi-dim arrays (distroys keys)
$ab = array(); if(!is_array($a)) return $ab;
foreach($a as $value){
if(is_array($value)){
$ab = array_merge($ab,array_flatten($value));
}else{
array_push($ab,$value);
}
}
return $ab;
}
Jck_true (leave out the '_' at gmail dot com)
25-Jan-2008 07:00
25-Jan-2008 07:00
A usefull function that returns a flat array.
I use it in a template system. Let the user pass a multidimensional array. Convert it using my function. Then use
<?php
$array = flatten($array,'','{$','}','->');
echo str_replace(array_keys($array),array_values($array),$template)
/**
* Flattens out an multidimension array
* Using the last parameters you can define the new key based on the old path.
* @param array $array A multidimension array
* @param string $prefix Internal perfix parameter - leave empty.
* @param string $start_string What string should start the final array key?
* @param string $end_string What string should end the final array key?
* @param string $seperator The string that should seperate the piecies in final array key path
* @return array Returns the flat array
*/
function flatten($array, $start_string= '{$',$end_string= '}',$seperator='->',$prefix="") {
$return = array();
foreach($array as $key=>$value) {
if (is_array($value)) {
$return = array_merge($return, Parser_method_replace::flatten($value, $prefix.$key.$seperator,$start_string,$end_string,$seperator));
} else
$return [$start_string.$prefix.$key.$end_string] = $value;
}
return $return;
}
}
?>
Example:
$template = 'My string with replacement {$test->subkey}';
{$test->subkey} will get replaced with $array['test']['subkey']
chaos dot global dot net at gmail dot com
03-Jan-2008 08:53
03-Jan-2008 08:53
if some one will need to convert array to php code use this function:
DEFINE('OFFSET_DELIMETER', "\t");
function array2php($array, $offset = OFFSET_DELIMETER) {
$text = '';
foreach($array as $k => $v) {
if (is_array($v)) {
$text .= "{$offset}'{$k}' => array(\n".array2php($v, $offset.OFFSET_DELIMETER)."$offset)";
} else {
$text .= "{$offset}'{$k}' => ".(is_string($v)? "'$v'": $v);
}
$text .= ",\n";
}
if ($len = strlen($text)) $text[$len - 2] = " ";
return $text;
}
Hayley Watson
17-Oct-2007 08:10
17-Oct-2007 08:10
Regarding cyberchrist at futura dot net's function. It makes an unnecessary array_merge(); the elements of $b that are merged with those of $a are immediately removed again by the array_diff(). The "limiting to known values" is entirely unnecessary, in other words: arrays already only contain "known values".
Also, the description and function only address the issue of whether $a is a subset of $b, not whether it is a proper subset. For $a to be a proper subset of $b, it must also be the case that $b is not a subset of $a.
Taking those points into account (and a personal aesthetic dislike of "if(test) return true; else return false;" gives:
<?php
function is_subset($a, $b)
{
return count(array_diff($a,$b))==0;
}
function is_proper_subset($a, $b)
{
return is_subset($a, $b) && !is_subset($b, $a);
}
?>
cyberchrist at futura dot net
15-Oct-2007 10:33
15-Oct-2007 10:33
Lately, dealing with databases, I've been finding myself needing to know if one array, $a, is a proper subset of $b.
Mathematically, this is asking (in set theory) [excuse the use of u and n instead of proper Unicode):
( A u B ) n ( ~ B )
What this does is it first limits to known values, then looks for anything outside of B but in the union of A and B (which would be those things in A which are not also in B).
If any value exists in this set, then A is NOT a proper subset of B, because a value exists in A but not in B. For A to be a proper subset, all values in A must be in B.
I'm sure this could easily be done any number of ways but this seems to work for me. It's not got a lot of error detection such as sterilizing inputs or checking input types.
// bool array_subset( array, array )
// Returns true if $a is a proper subset of $b, returns false otherwise.
function array_subset( $a, $b )
{
if( count( array_diff( array_merge($a,$b), $b)) == 0 )
return true;
else
return false;
}
Kazuyoshi Tlacaelel
30-Aug-2007 03:56
30-Aug-2007 03:56
<?php
/**
* converts a multidimensional array to a flat array
*
* trying to keep the original names of the keys
* if repeated keys are found a hash will be added to the
* keys trying to keep as much as possible of the original
* key context
*
* september 30 2007
*
* PHP version 5
*
* @license GPL
*
*/
$array = array ( 0 => array ( 0 => 1, 1 => 2, 2 => array ( 0 => 3, 1 => 4, 2 =>
array ( 0 => 5, 1 => 6, 2 => array ( 0 => 7, 1 => 8,),),), 3 => array (
0 => array ( 0 => 9, 1 => 10, 2 => array ( 0 => 11, 1 => 12,
2 => array ( 0 => 13, 1 => 14, 2 => array ( 0 => 15, 1 => 16,),),),),
1 => array ( 0 => 17, 1 => 18,),),), 1 => array ( 0 => 19, 1 => 20,),
2 => array ( 0 => array ( 0 => 21, 1 => 22, 2 => array ( 0 => 23, 1 => 24,
2 => array ( 0 => 25, 1 => 26, 2 => array ( 0 => 27, 1 => 28,),),),),
1 => array ( 0 => 29, 1 => 30,),),);
/**
* transforms a multidimensional array to a flat array
*
* the parameter is referenced
* so no returning value is needed
* @param array $array the multidimensional array to flat
* @return void
*/
function array_flatten(&$array)
{
function has_arrays($array)
{
foreach ($array as $item) {
if (is_array($item)) {
return true;
}
}
return false;
}
function copy_array(&$array, $array_key)
{
$array2 = $array[$array_key];
unset($array[$array_key]);
foreach ($array2 as $subkey => $subvalue) {
if (array_key_exists($subkey, $array)) {
$array[generate_unique_key($subkey)] = $subvalue;
} else {
$array[$subkey] = $subvalue;
}
}
}
function generate_unique_key($key)
{
if (strlen($key)>8) {
$key = $key[0] . $key[1] . $key[2];
}
$id = $key . '_';
$uid = uniqid();
$len = strlen($uid);
$max = (9 - strlen($key));
for ($c = $len; ; $c --) {
$id .= $uid[$c];
if ($c == ($len - $max)) {
break;
}
}
return $id;
}
function get_array_indexes($array)
{
$ret_array = array();
foreach ($array as $key => $value) {
if (is_array($value)) {
$ret_array[] = $key;
}
}
return $ret_array;
}
while(has_arrays($array)) {
foreach (get_array_indexes($array) as $key) {
copy_array($array, $key);
}
}
}
array_flatten($array);
array_multisort($array);
var_export($array);
/**
* OUTPUT
*
* array (
* 0 => 1,
* '1_403767b6' => 2,
* '0_793767b6' => 3,
* '1_8a3767b6' => 4,
* '0_454767b6' => 5,
* '1_564767b6' => 6,
* '0_035767b6' => 7,
* '1_345767b6' => 8,
* '0_e74767b6' => 9,
* '1_f84767b6' => 10,
* '0_855767b6' => 11,
* '1_a65767b6' => 12,
* '0_4e5767b6' => 13,
* '1_6f5767b6' => 14,
* '0_566767b6' => 15,
* '1_876767b6' => 16,
* '0_5b4767b6' => 17,
* '1_6c4767b6' => 18,
* '0_d43767b6' => 19,
* 1 => 20,
* '0_4e3767b6' => 21,
* '1_5f3767b6' => 22,
* '0_ad4767b6' => 23,
* '1_ce4767b6' => 24,
* '0_485767b6' => 25,
* '1_695767b6' => 26,
* '0_116767b6' => 27,
* '1_426767b6' => 28,
* '0_814767b6' => 29,
* '1_924767b6' => 30,
* )
*/
?>
mo dot longman at gmail dot com
31-Jul-2007 03:27
31-Jul-2007 03:27
to 2g4wx3:
i think better way for this is using JSON, if you have such module in your PHP. See json.org.
to convert JS array to JSON string: arr.toJSONString();
to convert JSON string to PHP array: json_decode($jsonString);
You can also stringify objects, numbers, etc.
g4wx3
19-Jul-2007 06:16
19-Jul-2007 06:16
I needed a function to convert a php array into a javascript array.
No problem i found it on "the net".
But the function i found wasn't good enough, instead of return a string with javascript-array it echoed directly everything.
I wanted to write the string to a file, when calling the function out of my function libary.
Secondly, there where minor "bugs" in the script, when you're original array contained characters like line breaks(\r\n,..), or quotes('), it would hack up the javascript array
Sow, i changed the function and fixed the bug.
<?php
//SUPER COOL : http://www.communitymx.com/content/article.cfm?page=3&cid=7CD16
//Checkout: REVERSE: http://www.hscripts.com/tutorials/php/jsArrayToPHP.php
//Convert a PHP array to a JavaScript one (rev. 4)
//Changlog by g4wx3: echo replaced by $output, added function output
function output($string) //make javascript ready
{
$string = str_replace( array( '\\' , '\'' ), array('\\\\', '\\\'') , $string); //-> for javascript array
$string = str_replace( array("\r\n", "\r", "\n") , '<br>' , $string); //nl2br
return $string;
}
function arrayToJS4($array, $baseName ) {
//Write out the initial array definition
//v4 echo ($baseName . " = new Array(); \r\n ");
$output = $baseName . " = new Array(); \r\n ";
//Reset the array loop pointer
reset ($array);
//Use list() and each() to loop over each key/value
//pair of the array
while (list($key, $value) = each($array)) {
if (is_numeric($key)) {
//A numeric key, so output as usual
$outKey = "[" . $key . "]";
} else {
//A string key, so output as a string
$outKey = "['" . $key . "']";
}
if (is_array($value)) {
//The value is another array, so simply call
//another instance of this function to handle it
$output .= arrayToJS4($value, $baseName . $outKey);
} else {
//Output the key declaration
//v4 echo ($baseName . $outKey . " = ");
$output .= $baseName . $outKey . " = ";
//Now output the value
if (is_string($value)) {
//Output as a string, as we did before
//v4 echo ("'" . output($value) . "'; \r\n ");
$output .= "'" . output($value) . "'; \r\n ";
} else if ($value === false) {
//Explicitly output false
//v4 echo ("false; \r\n");
$output .= "false; \r\n";
} else if ($value === NULL) {
//Explicitly output null
//v4 echo ("null; \r\n");
$output .= "null; \r\n";
} else if ($value === true) {
//Explicitly output true
//v4 echo ("true; \r\n");
$output .= "true; \r\n";
} else {
//Output the value directly otherwise
//v4 echo ($value . "; \r\n");
$output .= $value . "; \r\n";
}
}
}
return $output;
}
?>
You can use this for printing $_GET array, for example
peanutpad at msn dot com
16-Jun-2007 07:15
16-Jun-2007 07:15
heres a function from http://www.linksback.org Feedback welcome, of course! Public domain, yadda yadda.
function mySort(&$array,$key) {
if (!is_array($array) || count($array) == 0) return true;
$assocSortCompare = '$a = $a["'.$key.'"]; $b = $b["'.$key.'"];';
if (is_numeric($array[0][$key])) {
$assocSortCompare.= ' return ($a == $b) ? 0 : (($a < $b) ? -1 : 1);';
} else {
$assocSortCompare.= ' return strcmp($a,$b);';
}
$assocSortCompare = create_function('$a,$b',$assocSortCompare);
return usort($array,$assocSortCompare);
}
webdev at svbeatrix dot com
12-Jun-2007 01:06
12-Jun-2007 01:06
Bugs happen, but how can people post functions that WON'T EVEN COMPILE! I truly detest finding a cool code snippet or function and then having to debug them. Sorry for the rant, but I have experienced this scenario a number of times. TEST YOUR CODE, THEN POST!
Here is a revised and corrected previously posted function ArrayDepth, which had 3 bugs and yes, would not compile.
function ArrayDepth($Array,$DepthCount=-1) {
// Find maximum depth of an array
// Usage: int ArrayDepth( array $array )
// returns integer with max depth
// if Array is a string or an empty array it will return 0
$DepthArray=array(0);
$DepthCount++;
$Depth = 0;
if (is_array($Array))
foreach ($Array as $Key => $Value) {
$DepthArray[]=ArrayDepth($Value,$DepthCount);
}
else
return $DepthCount;
return max($DepthCount,max($DepthArray));
}
sid dot pasquale at gmail dot com
30-May-2007 06:57
30-May-2007 06:57
<?php
/* This function allow you to transform a multidimensional array
in a simple monodimensional array.
Usage: array_walk($oldarray, 'flatten_array', &$newarray);
For example, this code below shows to you:
Array
(
[1] => Array
(
[0] => 1
[1] => 2
)
[2] => Array
(
[0] => 3
[1] => 4
)
)
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
)
*/
function flatten_array($value, $key, &$array) {
if (!is_array($value))
array_push($array,$value);
else
array_walk($value, 'flatten_array', &$array);
}
$oldarray = array(
1 => array(1,2),
2 => array(3,4)
);
$newarray = array();
array_walk($oldarray, 'flatten_array', &$newarray);
echo "<pre>";
print_r($oldarray);
print_r($newarray);
echo "</pre>";
?>
info at dyflexis dot nl
18-Apr-2007 05:13
18-Apr-2007 05:13
A modernized version of the flatten_array() functies written by
davidj at boundlessgallery dot DISLIKESPAM dot com
on 02-Apr-2004 03:10
This function is able to work with associative arrays
<?php
function flatten_array($array) {
$size=sizeof($array);
$keys=array_keys($array);
for($x = 0; $x < $size; $x++) {
$element = $array[$keys[$x]];
if(is_array($element)) {
$results = flatten_array($element);
$sr = sizeof($results);
$sk=array_keys($results);
for($y = 0; $y < $sr; $y++) {
$flat_array[$sk[$y]] = $results[$sk[$y]];
}
} else {
$flat_array[$keys[$x]] = $element;
}
}
return $flat_array;
}
?>
info at joolee dot nl
19-Mar-2007 09:49
19-Mar-2007 09:49
A slight modification in the arraytostring function, posted below. This function lists an array the same way you would define it in PHP.
<?PHP
function arraytostring($array, $depth = 0)
{
if($depth > 0)
$tab = implode('', array_fill(0, $depth, "\t"));
$text.="array(\n";
$count=count($array);
foreach ($array as $key=>$value)
{
$x++;
if (is_array($value))
{
if(substr($text,-1,1)==')') $text .= ',';
$text.=$tab."\t".'"'.$key.'"'." => ".arraytostring($value, $depth+1);
continue;
}
$text.=$tab."\t"."\"$key\" => \"$value\"";
if ($count!=$x) $text.=",\n";
}
$text.="\n".$tab.")\n";
if(substr($text, -4, 4)=='),),')$text.='))';
return $text;
}
?>
Vladson
15-Mar-2007 12:18
15-Mar-2007 12:18
Hope someone find it useful..
<?php
/*
Function: eratosthenes
Usage: array eratosthenes ( int max_value )
Description:
Sieve of Eratosthenes is a simple, ancient algorithm
for finding all prime numbers up to a specified integer.
It was created by Eratosthenes, an ancient Greek mathematician.
*/
function eratosthenes($max) {
$sieve = array_fill(2, ($max-1), false);
while ($key = array_search(false, $sieve)) {
$sieve[$key] = true;
for ($i=$key*$key; $i<=$max; $i+=$key) {
if (array_key_exists($i, $sieve)) {
unset($sieve[$i]);
}
}
}
return array_keys($sieve);
}
?>
aflavio at gmail dot com
01-Mar-2007 04:29
01-Mar-2007 04:29
/**
* Remove a value from a array
* @param string $val
* @param array $arr
* @return array $array_remval
*/
function array_remval($val, &$arr)
{
$array_remval = $arr;
for($x=0;$x<count($array_remval)-1;$x++)
{
$i=array_search($val,$array_remval);
if($i===false)return false;
$array_remval=array_merge(array_slice($array_remval, 0,$i), array_slice($array_remval, $i+1));
}
return $array_remval;
}
$stack = array("orange", "banana", "apple", "raspberry", "apple");
output $stack = array("orange", "banana", "raspberry");
rune at zedeler dot dk
28-Feb-2007 01:42
28-Feb-2007 01:42
Notice that keys are considered equal if they are "=="-equal. That is:
<?
$a = array();
$a[1] = 'this is the first value';
$a[true] = 'this value overrides the first value';
$a['1'] = 'so does this one';
?>
Mark Lindeman
17-Jan-2007 07:10
17-Jan-2007 07:10
Very simple solution for changing the key of an associative array, of course it will fail in a lot of scenarios, but will do the trick in simple arrays:
<?php
function replace_key(&$input, $from_key, $to_key)
{
$input = unserialize(str_replace(':"'.$from_key.'";', ':"'.$to_key.'";',serialize($input)));
}
$array =array("a"=>1, "B"=>2, "c"=>3);
replace_key($array, "B", "b");
print_r($array);
?>
Output:
Array
(
[a] => 1
[b] => 2
[c] => 3
)
php_spam {at] erif dot org
29-Dec-2006 03:52
29-Dec-2006 03:52
public domain, yadda yadda. :)
This function takes a flatfile-like array (like the results of a joined query) and normalizes it based on whichever parameters you like.
<?php
function hashByFields($things,$fields) {
$retval=null;
$count = count($fields);
foreach ($things as $thing) {
$fwibble =& $retval;
for ($j=0;$j<$count;$j++) {
$val = $thing[$fields[$j]];
if ($j == $count - 1) {
$fwibble[$val] = $thing;
} else if (!isset($fwibble[$val])) {
$fwibble[$val] = Array();
}
$fwibble =& $fwibble[$val];
}
}
return $retval;
}
?>
simone dot carletti at unimc dot it
29-Nov-2006 12:09
29-Nov-2006 12:09
Ever wanted to obtain a subset of an associative array from a list of parameters (stored into a non-associative array)?
Give this a try:
<?php
$params = array("name" => "Simone", "gender" => "M", "city" => "Macerata", "phone" => 123);
$fields = array("name", "city");
echo "<pre>";
print_r($params);
print_r($fields);
print_r(subArr($params, $fields));
function subArr($assocArrHaystack, $arrFields)
{
$arrSub = array();
foreach ($assocArrHaystack as $key => $value) {
if (in_array($key, $arrFields)) {
$arrSub[$key] = $value;
}
}
return $arrSub;
}
?>
And the output is:
Array
(
[name] => Simone
[gender] => M
[city] => Macerata
[phone] => 123
)
Array
(
[0] => name
[1] => city
)
Array
(
[name] => Simone
[city] => Macerata
)
Enjoy!
Simone
elkabong at samsalisbury dot co dot uk
13-Nov-2006 08:43
13-Nov-2006 08:43
An improvement to the array_deep_copy function I posted ages ago which takes a 'snapshot' of an array, making copies of all actual values referenced... Now it is possible to prevent it traversing the tree forever when an array references itself. You can set the default $maxdepth to anything you like, you should never call this function with the $depth specified!
<?php
/* Make a complete deep copy of an array replacing
references with deep copies until a certain depth is reached
($maxdepth) whereupon references are copied as-is... */
function array_deep_copy (&$array, &$copy, $maxdepth=50, $depth=0) {
if($depth > $maxdepth) { $copy = $array; return; }
if(!is_array($copy)) $copy = array();
foreach($array as $k => &$v) {
if(is_array($v)) { array_deep_copy($v,$copy[$k],$maxdepth,++$depth);
} else {
$copy[$k] = $v;
}
}
}
# call it like this:
array_deep_copy($array_to_be_copied,$deep_copy_of_array,$maxdepth);
?>
Hope someone finds it useful!
ob at babcom dot biz
29-Aug-2006 12:18
29-Aug-2006 12:18
Regarding my own posting 2 postings down about the function ArrayDepth() to find the maximum depth of a multidimensional array:
A number of functions for counting array dimensions have been posted. And I tried using them. Yet, if at all they only return the depth of the first branch of the array. They can not handle arrays where a later path holds a more dimension than the first.
My version will check all paths down the array and return the maximum depth. That's why I posted it.
ob at babcom dot biz
28-Aug-2006 09:56
28-Aug-2006 09:56
Here are two functions Array2String() and String2Array() based on functions posted below by daenders AT yahoo DOT com.
An improvement handling NULL values correctly was posted by designatevoid at gmail dot com.
My version also solves the NULL-value-problem plus keeps support of multidimensional arrays.
<?php
// convert a multidimensional array to url save and encoded string
// usage: string Array2String( array Array )
function Array2String($Array) {
$Return='';
$NullValue="^^^";
foreach ($Array as $Key => $Value) {
if(is_array($Value))
$ReturnValue='^^array^'.Array2String($Value);
else
$ReturnValue=(strlen($Value)>0)?$Value:$NullValue;
$Return.=urlencode(base64_encode($Key)) . '|' . urlencode(base64_encode($ReturnValue)).'||';
}
return urlencode(substr($Return,0,-2));
}
?>
<?php
// convert a string generated with Array2String() back to the original (multidimensional) array
// usage: array String2Array ( string String)
function String2Array($String) {
$Return=array();
$String=urldecode($String);
$TempArray=explode('||',$String);
$NullValue=urlencode(base64_encode("^^^"));
foreach ($TempArray as $TempValue) {
list($Key,$Value)=explode('|',$TempValue);
$DecodedKey=base64_decode(urldecode($Key));
if($Value!=$NullValue) {
$ReturnValue=base64_decode(urldecode($Value));
if(substr($ReturnValue,0,8)=='^^array^')
$ReturnValue=String2Array(substr($ReturnValue,8));
$Return[$DecodedKey]=$ReturnValue;
}
else
$Return[$DecodedKey]=NULL;
}
return $Return;
}
?>
ob at babcom dot biz
28-Aug-2006 08:23
28-Aug-2006 08:23
Here is a function to find out the maximum depth of a multidimensional array.
<?php
// return depth of given array
// if Array is a string ArrayDepth() will return 0
// usage: int ArrayDepth(array Array)
function ArrayDepth($Array,$DepthCount=-1,$DepthArray=array()) {
$DepthCount++;
if (is_array($Array))
foreach ($Array as $Key => $Value)
$DepthArray[]=ArrayDepth($Value,$DepthCount);
else
return $DepthCount;
foreach($DepthArray as $Value)
$Depth=$Value>$Depth?$Value:$Depth;
return $Depth;
}
?>
ob at babcom dot biz
28-Aug-2006 08:18
28-Aug-2006 08:18
Regarding the function of spam at madhermit dot net from January 9th 2006:
That function only preserves the deepest keys and values.
If you try to flatten an array with that function where the deepest instance of keys might be the same where as keys in the "key-path" are different, values will be overwritten.
So here is a function that preserves the whole key-path and the keys of the flattened array will be string keys consisting of the key-path separated by $Separator.
<?php
// flatten multidimensional array to one dimension
// preserves keys by generating a key for the flattened array which consists of the
// key-path of the multidimensional array separated by $Separator
// usage: array ArrayFlatten( array Array [, string Separator] )
function ArrayFlatten($Array,$Separator="_",$FlattenedKey='') {
$FlattenedArray=Array();
foreach($Array as $Key => $Value) {
if(is_Array($Value))
$FlattenedArray=Array_merge($FlattenedArray,
ArrayFlatten($Value,$Separator,
(strlen($FlattenedKey)>0
?$FlattenedKey.$Separator
:"").$Key)
);
else
$FlattenedArray[$FlattenedKey.$Separator.$Key]=$Value;
}
return $FlattenedArray;
}
?>
sergio at {NO_SPAM_PLEASE]inservibile dot org
16-Aug-2006 09:17
16-Aug-2006 09:17
In a pratical problem, I was involved in a system of queries giving the behaviour of all combinations of some parameters. How to write those queries?
The problem was to generate automatically every possible combination of those parameters. I didn't find a function and I wrote it.
(Naturally, a different way could be to build a binary sequence, but I find this function more compact and useful).
So, consider an array of objects and suppose to need all possibile combinations of those objects. Here is the function, that could be useful for some folk.
Enjoy.
<?php
function combinations($elements) {
if (is_array($elements)) {
/*
I want to generate an array of combinations, i.e. an array whose elements are arrays
composed by the elements of the starting object, combined in all possible ways.
The empty array must be an element of the target array.
*/
$combinations=array(array()); # don't forget the empty arrangement!
/*
Built the target array, the algorithm is to repeat the operations below for each object of the starting array:
- take the object from the starting array;
- generate all arrays given by the target array elements merged with the current object;
- add every new combination to the target array (the array of arrays);
- add the current object (as a vector) to the target array, as a combination of one element.
*/
foreach ($elements as $element) {
$new_combinations=array(); # temporary array, see below
foreach ($combinations as $combination) {
$new_combination=array_merge($combination,(array)$element);
# I cannot merge directly with the main array ($combinations) because I'm in the foreach cycle
# I use a temporary array
array_push($new_combinations,$new_combination);
}
$combinations=array_merge($combinations,$new_combinations);
}
return $combinations;
} else {
return false;
}
}
?>
To test the function:
<?php
$elements=array('bitter','sour','salty','sweet');
print_r(combinations($elements));
?>
The exemple was suggested in 6th century BC.
See why on: http://en.wikipedia.org/wiki/Combinatorics#Overview_and_history
za at byza dot it
21-Jul-2006 12:52
21-Jul-2006 12:52
Updated functions for moving element between associative arrays using a numeric index.
Sample:
$a=array("04"=>"alpha",4=>"bravo","c"=>"charlie","d"=>"delta");
$b=array_move($a,4,2);
Move element "bravo" after "delta" keeping keys.
Old function probably goes wrong moving "alpha": caused by array_search that match numeric index 4 with "04" (string).
Follow:
<?php
// array functions - 20/07/2006 12.28
if(!defined("ARRAY_FUNCS")) {
// Swap 2 elements in array preserving keys.
function array_swap(&$array,$key1,$key2) {
$v1=$array[$key1];
$v2=$array[$key2];
$out=array();
foreach($array as $i=>$v) {
if($i===$key1) {
$i=$key2;
$v=$v2;
} else if($i===$key2) {
$i=$key1;
$v=$v1;
}
$out[$i]=$v;
}
return $out;
}
// Get a key position in array
function array_kpos(&$array,$key) {
$x=0;
foreach($array as $i=>$v) {
if($key===$i) return $x;
$x++;
}
return false;
}
// Return key by position
function array_kbypos(&$array,$pos) {
$x=0;
foreach($array as $i=>$v) {
if($pos==$x++) return $i;
}
return false;
}
// Move an element inside an array preserving keys
// $relpos should be like -1, +2...
function array_move(&$array,$key,$relpos) {
if(!$relpos) return false;
$from=array_kpos($array,$key);
if($from===false) return false;
$to=$from+$relpos+($relpos>0?1:0);
$len=count($array);
if($to>=$len) {
$val=$array[$key];
unset($array[$key]);
$array[$key]=$val;
} else {
if($to<0) $to=0;
$new=array();
$x=0;
foreach($array as $i=>$v) {
if($x++==$to) $new[$key]=$array[$key];
if($i!==$key) $new[$i]=$v;
}
$array=$new;
}
return $array;
}
define("ARRAY_FUNCS",true);
}
?>
g8z at yahoo dot com
20-Jul-2006 05:42
20-Jul-2006 05:42
<?php
/**
filter_by_occurrence scans an array, and depending on the $exclusive parameter, includes or excludes elements occuring at least $min_occurences times, and at most $max_occurances times.
parameters:
$data_set = the array to work on
$min_occurrences = the minimum number of occurrences
$max_occurrences = the maximum number of occurrences (zero for unlimited)
$exclusive = if true, will return only results that do not occur within the specified bounds
Courtesy of the $5 Script Achive: http://www.tufat.com
**/
function filter_by_occurrence ($data_set, $min_occurrences, $max_occurrences = 0, $exclusive = false) {
$results = array();
// iterate through unique elements
foreach (array_unique($data_set) as $value) {
// count how many times element is in the array
$count = 0;
foreach ($data_set as $element) {
if ($element == $value)
$count++;
}
// check if meets min_occurences
$is_in_range = false;
if ($count >= $min_occurrences) {
// check if meets max_occurrences (unless max_occurences is 0)
if ( $count <= $max_occurrences || $max_occurrences == 0)
$is_in_range = true;
}
// add item to array if appropriate
if ($is_in_range && !$exclusive)
array_push($results, $value);
if (!$is_in_range && $exclusive)
array_push($results, $value);
}
// return results
return $results;
}
// EXAMPLE:
$test_data = array('pizza', 'ham', 'pizza', 'pizza', 'ham', 'fish', 'fish', 'fish', 'fish', 'dinosaur');
foreach (filter_by_occurrence( $test_data, 3, 0, false ) as $value)
{
print $value . ' occurs at least 3 times. <br />';
}
?>
nick
11-Jul-2006 09:46
11-Jul-2006 09:46
This little function will move an array element up or down. Unlike the similar function in a previous comment this will work for associative arrays too.
Because it uses current to traverse the array it will fail if a value is false (or 0). It could probably be rewritten to use each() but I couldn't work it out.
<?php
function array_move_element($array, $value, $direction = 'up') {
$temp = array();
if(end($array) == $value && $direction == 'down') {
return $array;
}
if(reset($array) == $value && $direction == 'up') {
return $array;
}
while ($array_value = current($array)) {
$this_key = key($array);
if ($array_value == $value) {
if($direction == 'down') {
$next_value = next($array);
$temp[key($array)] = $next_value;
$temp[$this_key] = $array_value;
} else {
$prev_value = prev($array);
$prev_key = key($array);
unset($temp[$prev_key]);
$temp[$this_key] = $array_value;
$temp[$prev_key] = $prev_value;
next($array);
next($array);
}
continue;
} else {
$temp[$this_key] = $array_value;
}
next($array);
}
return $temp;
}
?>
kroczu at interia dot pl
06-Jul-2006 10:53
06-Jul-2006 10:53
<?
//A little function to convert array to simle xml:
function array_xml($array, $num_prefix = "num_")
{
if(!is_array($array)) // text
{
return $array;
}
else
{
foreach($array as $key=>$val) // subnode
{
$key = (is_numeric($key)? $num_prefix.$key : $key);
$return.="<".$key.">".array_xml($val, $num_prefix)."</".$key.">";
}
}
return $return;
}
//example:
$array[0][0] = 1;
$array[0]['test'] = "test";
$array['test1']['test2'] = "test";
$array['test'][0] = "test";
$array['test'][1]['test_x'] = $array;
print_r($array);
print"<xml>";
print array_xml($array);
print"</xml>";
/*
print_r($array) previev:
Array
(
[0] => Array
(
[0] => 1
[test] => test
)
[test1] => Array
(
[test2] => test
)
[test] => Array
(
[0] => test
[1] => Array
(
[test_x] => Array
(
[0] => Array
(
[0] => 1
[test] => test
)
[test1] => Array
(
[test2] => test
)
[test] => Array
(
[0] => test
)
)
)
)
)
result xml in firefox preview:
-<xml>
- <num_0>
<num_0>1</num_0>
<test>test</test>
</num_0>
- <test1>
<test2>test</test2>
</test1>
- <test>
<num_0>test</num_0>
- <num_1>
- <test_x>
- <num_0>
<num_0>1</num_0>
<test>test</test>
</num_0>
- <test1>
<test2>test</test2>
</test1>
- <test>
<num_0>test</num_0>
</test>
</test_x>
</num_1>
</test>
</xml>
*/
?>
vinaur at gmail dot com
07-Jun-2006 05:36
07-Jun-2006 05:36
Regarding the array to string (parse_line) and string to array (parse_array) functions posted below by Kevin Law.
The functions will not work correctly if the array being parsed contains values that include commas and possibly parentheses.
To solve this problem I added urlencode and urldecode functions and the result looks like this:
<?php
function parse_line($array){
$line = "";
foreach($array AS $key => $value){
if(is_array($value)){
$value = "(". parse_line($value) . ")";
}
else
{
$value = urlencode($value);
}
$line = $line . "," . urlencode($key) . ":" . $value . "";
}
$line = substr($line, 1);
return $line;
}
function parse_array($line){
$q_pos = strpos($line, ":");
$name = urldecode(substr($line,0,$q_pos));
$line = trim(substr($line,$q_pos+1));
$open_backet_pos = strpos($line, "(");
if($open_backet_pos===false || $open_backet_pos>0){
$comma_pos = strpos($line, ",");
if($comma_pos===false){
$result[$name] = urldecode($line);
$line = "";
}else{
$result[$name] = urldecode(substr($line,0,$comma_pos));
$result = array_merge($result, parse_array(substr($line,$comma_pos+1)));
$line = "";
}
}else if ($open_backet_pos==0){
$line = substr($line,1);
$num_backet = 1;
$line_char_array = str_split($line);
for($index = 0; count($line_char_array); $index++){
if($line_char_array[$index] == '('){
$num_backet++;
}else if ($line_char_array[$index] == ')'){
$num_backet--;
}
if($num_backet == 0){
break;
}
}
$sub_line = substr($line,0,$index);
$result[$name] = parse_array($sub_line);
$line = substr($line,$index+2);
}
if(strlen($line)!=0){
$result = array_merge($result, parse_array($line));
}
return $result;
}
?>
elkabong at samsalisbury dot co dot uk
25-Mar-2006 07:31
25-Mar-2006 07:31
Hello all! I've just been working on a system to automatically manage virtualhosts on an Apache box and I needed to duplicate some multidimensional arrays containing references to other multidimensional array some of which also contained references. These big arrays are defaults which need to be overwritten on a per-virtualhost basis, so copying references into the virtualhost arrays was not an option (as the defults would get corrupted).
After hours of banging me head on the wall, this is what I've come up with:
<?PHP # Tested on PHP Version 5.0.4
# Recursively set $copy[$x] to the actual values of $array[$x]
function array_deep_copy (&$array, &$copy) {
if(!is_array($copy)) $copy = array();
foreach($array as $k => $v) {
if(is_array($v)) {
array_deep_copy($v,$copy[$k]);
} else {
$copy[$k] = $v;
}
}
}
# To call it do this:
$my_lovely_reference_free_array = array();
array_deep_copy($my_array_full_of_references, $my_lovely_reference_free_array);
# Now you can modify all of $my_lovely_reference_free_array without
# worrying about $my_array_full_of_references!
?>
NOTE: Don't use this on self-referencing arrays! I haven't tried it yet but I'm guessing an infinate loop will occur...
I hope someone finds this useful, I'm only a beginner so if there's any fatal flaws or improvements please let me know!
alessandronunes at gmail dot com
19-Mar-2006 07:06
19-Mar-2006 07:06
The Ninmja sugestion plus multidiomensional array search (recursive):
function cleanArray($array) {
foreach ($array as $index => $value) {
if(is_array($array[$index])) $array[$index] = cleanArray($array[$index]);
if (empty($value)) unset($array[$index]);
}
return $array;
}
Atomo64
04-Jan-2006 10:14
04-Jan-2006 10:14
Here's a simple way to convert an array to a string and vice-versa.
Note that it does NOT support string keys,
for more information take a look at what it does:
<?php
class OptionAsArray
{
function make_the_arr($value)
{
$newValue=array();
$vals=explode('&',$value);
foreach($vals as $v)
{
if($v{0}=='@')
$newValue[]=$this->make_the_arr(
urldecode(substr($v,1)));
else
$newValue[]=urldecode($v);
}
if(empty($newValue))
return false;
else
return $newValue;
}
function make_the_value($arr)
{
$newValue=array();
foreach($arr as $value)
{
if(is_array($value))
$newValue[]='@'.urlencode(
implode('&',$this->make_the_value($value)));
else
$newValue[]=urlencode($value);
}
if(empty($newValue))
return false;
else
return $newValue;
}
}
?>
jonathan at sharpmedia dot net
05-Dec-2005 11:37
05-Dec-2005 11:37
/**
* Flattens a multimentional array.
*
* Takes a multi-dimentional array as input and returns a flattened
* array as output. Implemented using a non-recursive algorithm.
* Example:
* <code>
* $in = array('John', 'Jim', array('Jane', 'Jasmine'), 'Jake');
* $out = array_flatten($in);
* // $out = array('John', 'Jim', 'Jane', 'Jasmine', 'Jake');
* </code>
*
* @author Jonathan Sharp <jonathan@sharpmedia.net>
* @var array
* @returns array
*/
function array_flatten($array)
{
while (($v = array_shift($array)) !== null) {
if (is_array($v)) {
$array = array_merge($v, $array);
} else {
$tmp[] = $v;
}
}
return $tmp;
}
stalker at ruun dot de
20-Nov-2005 06:15
20-Nov-2005 06:15
I had some problems while selecting sub-arrays from multi-dimensional arrays (like the SQL-WHERE clause), so i wrote the following function:
<?php
function selectMultiArray($__multiarray,$__key,$__value) {
foreach($__multiarray as $multipart) {
if($multipart[$__key] == $__value) {
$__return[] = $multipart;
}
}
if(empty($__return)) {
return FALSE;
}
return $__return;
}
?>
hope someones finding this helpful. If you have better was for getting to this, please answer.
greets,
St4Lk3R
msajko at gmail dot com
19-Oct-2005 05:25
19-Oct-2005 05:25
array_to_string and sister function string_to_array with multi dimensional array support.
// Converts an array to a string that is safe to pass via a URL
function array_to_string($array) {
$retval = '';
$null_value = "^^^";
foreach ($array as $index => $val) {
if(gettype($val)=='array') $value='^^array^'.array_to_string($val); else $value=$val;
if (!$value)
$value = $null_value;
$retval .= urlencode(base64_encode($index)) . '|' . urlencode(base64_encode($value)) . '||';
}
return urlencode(substr($retval, 0, -2));
}
// Converts a string created by array_to_string() back into an array.
function string_to_array($string) {
$retval = array();
$string = urldecode($string);
$tmp_array = explode('||', $string);
$null_value = urlencode(base64_encode("^^^"));
foreach ($tmp_array as $tmp_val) {
list($index, $value) = explode('|', $tmp_val);
$decoded_index = base64_decode(urldecode($index));
if($value != $null_value){
$val= base64_decode(urldecode($value));
if(substr($val,0,8)=='^^array^') $val=string_to_array(substr($val,8));
$retval[$decoded_index]=$val;
}
else
$retval[$decoded_index] = NULL;
}
return $retval;
}
phpnet_spam at erif dot org
18-Oct-2005 10:36
18-Oct-2005 10:36
Thought this might save someone a few hours. :) Feedback welcome, of course! Public domain, yadda yadda.
function assocSort(&$array,$key) {
if (!is_array($array) || count($array) == 0) return true;
$assocSortCompare = '$a = $a["'.$key.'"]; $b = $b["'.$key.'"];';
if (is_numeric($array[0][$key])) {
$assocSortCompare.= ' return ($a == $b) ? 0 : (($a < $b) ? -1 : 1);';
} else {
$assocSortCompare.= ' return strcmp($a,$b);';
}
$assocSortCompare = create_function('$a,$b',$assocSortCompare);
return usort($array,$assocSortCompare);
}
designatevoid at gmail dot com
14-Oct-2005 10:40
14-Oct-2005 10:40
Here's an improvement to the array_to_string and string_to_array functions posted by daenders AT yahoo DOT com above.
They now handle NULL values correctly.
<?php
// Converts an array to a string that is safe to pass via a URL
function array_to_string($array) {
$retval = '';
$null_value = "^^^";
foreach ($array as $index => $value) {
if (!$value)
$value = $null_value;
$retval .= urlencode(base64_encode($index)) . '|' . urlencode(base64_encode($value)) . '||';
}
return urlencode(substr($retval, 0, -2));
}
// Converts a string created by array_to_string() back into an array.
function string_to_array($string) {
$retval = array();
$string = urldecode($string);
$tmp_array = explode('||', $string);
$null_value = urlencode(base64_encode("^^^"));
foreach ($tmp_array as $tmp_val) {
list($index, $value) = explode('|', $tmp_val);
$decoded_index = base64_decode(urldecode($index));
if($value != $null_value)
$retval[$decoded_index] = base64_decode(urldecode($value));
else
$retval[$decoded_index] = NULL;
}
return $retval;
}
?>
aidan at php dot net
09-Oct-2005 05:32
09-Oct-2005 05:32
To convert an array to a HTML table, see:
http://aidanlister.com/repos/v/function.array2table.php
PEAR also provides a simular package with many more features,
http://pear.php.net/package/Var_Dump
za at lombardiacom dot it
28-Sep-2005 12:01
28-Sep-2005 12:01
<?php
// Swap 2 elements in array preserving keys.
function array_swap(&$array,$key1,$key2) {
$v1=$array[$key1];
$v2=$array[$key2];
$out=array();
foreach($array as $i=>$v) {
if($i==$key1) {
$i=$key2;
$v=$v2;
} else if($i==$key2) {
$i=$key1;
$v=$v1;
}
$out[$i]=$v;
}
return $out;
}
// Move an element inside an array preserving keys.
function array_move(&$array,$key,$position) {
$from=array_search($key,array_keys($array));
$to=$from+$position;
$tot=count($array);
if($position>0) $to++;
if($to<0) $to=0;
else if($to>=$tot) $to=$tot-1;
$n=0;
$out=array();
foreach($array as $i=>$v) {
if($n==$to) $out[$key]=$array[$key];
if($n++==$from) continue;
$out[$i]=$v;
}
return $out;
}
?>
Domenic Denicola
16-Aug-2005 03:49
16-Aug-2005 03:49
Another JavaScript conversion, this time to objects instead of arrays. They can be accessed the same way, but are declared much shorter, so it saves some download time for your users:
<?
function PhpArrayToJsObject($array, $objName)
{
return 'var ' . $objName . ' = ' . PhpArrayToJsObject_Recurse($array) . ";\n";
}
function PhpArrayToJsObject_Recurse($array)
{
// Base case of recursion: when the passed value is not a PHP array, just output it (in quotes).
if(! is_array($array) )
{
// Handle null specially: otherwise it becomes "".
if ($array === null)
{
return 'null';
}
return '"' . $array . '"';
}
// Open this JS object.
$retVal = "{";
// Output all key/value pairs as "$key" : $value
// * Output a JS object (using recursion), if $value is a PHP array.
// * Output the value in quotes, if $value is not an array (see above).
$first = true;
foreach($array as $key => $value)
{
// Add a comma before all but the first pair.
if (! $first )
{
$retVal .= ', ';
}
$first = false;
// Quote $key if it's a string.
if (is_string($key) )
{
$key = '"' . $key . '"';
}
$retVal .= $key . ' : ' . PhpArrayToJsObject_Recurse($value);
}
// Close and return the JS object.
return $retVal . "}";
}
?>
Difference from previous function: null values are no longer "" in the object, they are JavaScript null.
So for example:
<?
$theArray = array("A" => array("a", "b", "c" => array("x")), "B" => "y");
echo PhpArrayToJsObject($theArray, "myArray");
?>
Gives:
var myArray = {"A" : {0 : "a", 1 : "b", "c" : {0 : "x"}}, "B" : "y"};
You can still access them just like arrays, with myArray["A"][0] or myArray["A"]["c"][0] or whatever. Just shrinks your pages.
dieter peeters
11-Aug-2005 08:35
11-Aug-2005 08:35
in response to: Domenic Denicola
I reworked your function a bit and thought i just as well could post it.
Below is the cleaner version, just cut and paste ;) The third parameter is of little use to the coder, unless javascript declaration of variables changes at some point in the future - who knows.
Only minor point is the added parameter which probably gets copied every recursive call with an empty value, though i don't know the exact ways how php handles recursion internally. Most of the time php is pretty smart when optimizing code and an empty string shouldn't take much memory anyway :)
<?php
function phpArrayToJsArray($name,$array,$prePend='var ')
{
if (is_array($array)) { // Array recursion
$result = $name.' = new Array();'."\n";
foreach ($array as $key => $value) {
$result .= phpArrayToJsArray($name.'["'.$key.'"]',$value,'');
}
} else { // Base case of recursion
$result = $name.' = "'.$array.'";'."\n";
}
return $prePend.$result;
}
?>
michael at imreo com
21-Jul-2005 09:20
21-Jul-2005 09:20
Reply to array_cartesian_product of skopek at mediatac dot com, 13-Oct-2004 12:44:
Your function does not work in my configuration (WinXP, apache 2.0, php 4.3.11).
This part of code:
...
} else { //if next returns false, then reset and go on with previuos array...
reset($arrays[$j]);
}
...
cause infinite loop.
Replacing to
...
} elseif (isset($arrays[$j])) {
reset($arrays[$j]);
}
...
works good.
My complete working function (additionaly strings as keys are allowed):
<?php
function array_cartesian_product($arrays)
{
$result = array();
$arrays = array_values($arrays);
$sizeIn = sizeof($arrays);
$size = $sizeIn > 0 ? 1 : 0;
foreach ($arrays as $array)
$size = $size * sizeof($array);
for ($i = 0; $i < $size; $i ++)
{
$result[$i] = array();
for ($j = 0; $j < $sizeIn; $j ++)
array_push($result[$i], current($arrays[$j]));
for ($j = ($sizeIn -1); $j >= 0; $j --)
{
if (next($arrays[$j]))
break;
elseif (isset ($arrays[$j]))
reset($arrays[$j]);
}
}
return $result;
}
?>
daenders AT yahoo DOT com
09-Jul-2005 05:49
09-Jul-2005 05:49
Several people here have posted functions for converting arrays to strings, but nobody posted a sister function that would convert it back. Also, their data is not URL safe. These functions are URL safe, hide the data by MIME encoding it, and are much shorter. Enjoy. :-)
<?php
// Converts an array to a string that is safe to pass via a URL
function array_to_string($array) {
$retval = '';
foreach ($array as $index => $value) {
$retval .= urlencode(base64_encode($index)) . '|' . urlencode(base64_encode($value)) . '||';
}
return urlencode(substr($retval, 0, -2));
}
// Converts a string created by array_to_string() back into an array.
function string_to_array($string) {
$retval = array();
$string = urldecode($string);
$tmp_array = explode('||', $string);
foreach ($tmp_array as $tmp_val) {
list($index, $value) = explode('|', $tmp_val);
$retval[base64_decode(urldecode($index))] = base64_decode(urldecode($value));
}
return $retval;
}
// Example:
$array1 = array('index1' => 'val1', 'index2' => 'val2', 'index3' => 'val3');
echo '<pre>'; print_r($array1); echo '</pre>';
$string = array_to_string($array1);
echo '$string: '.$string.'<br />';
$array2 = string_to_array($string);
echo '<pre>'; print_r($array2); echo '</pre>';
?>
m227(a)poczta.onet.pl
21-Jan-2005 01:18
21-Jan-2005 01:18
How to count dimensions in multi-array? (corrected)
previous version didn't work when called more than one time.
($dimcount was preserved from previous call)
This is the way I corrected this:
function countdim($array)
{
if (is_array(reset($array)))
$return = countdim(reset($array)) + 1;
else
$return = 1;
return $return;
}
This function will return int number of array dimensions.