I don't know if this is a bug or a limitation, but I got in trouble using inside sprintf a call to a class method (being inside the class), like this:
<?php
class MyClass{
...
public function Render(){
...
$strToReturn = sprintf('<table><tr><td>%s</td></tr></table>',
$this->getControlHTML());
...
}
}
?>
The context was too complex to explain here and I didn't try to recreate the error in a simple context, but working with this code, I even got Apache crash (because sprintf did not return the right(expected) result).
All trouble was gone when I changed to:
<?php
class MyClass{
...
public function Render(){
...
$controlHTML = $this->getControlHTML();
$strToReturn = sprintf('<table><tr><td>%s</td></tr></table>',
$controlHTML );
...
}
}
?>
I didn't find any notes/comments here on this limitation, and no related bug.
(I use PHP 5.1.6 and Apache 2.2.3 on WinXP32)
sprintf
(PHP 4, PHP 5)
sprintf — フォーマットされた文字列を返す
説明
string sprintf ( string $format [, mixed $args [, mixed $...]] )フォーマット文字列 format に基づき生成された文字列を返します。
フォーマット文字列は 0 個以上のディレクティブ（指示子） により構成されます。ディレクティブには、そのまま結果にコピーされる (% を除く) 通常の文字と変換指定子 (conversion specifications) があり、 取り出される際はどちらもそれ自身がパラメータとなります。このことは sprintf() の場合だけでなく printf() の場合も同様です。
各変換指定子は、パーセント記号 (%) の後に これらの要素が一つ以上続いたものになります。
オプションの符号指定子。これは、 数値で符号 (- あるいは +) を使用するよう指定します。 デフォルトでは、数値が負の場合の - 符号のみが使用されます。 この指定子により、正の数にも強制的に + 符号をつけることができます。 これは PHP 4.3.0 で追加されました。
オプションのパディング指定子。これは、 文字列が正しい長さになるまでどんな文字で埋めるかということを 指定します。これは空白かまたは 0 (文字 '0') のいずれかです。デフォルトでは空白で埋められます。 これ以外のパディング文字を指定するには、その文字の前に 単一引用符 (') を置きます。 後述の例を参照ください。
- オプションのアラインメント指定子。これは、 結果を左寄せまたは右寄せにしたい場合に指定します。 デフォルトは右寄せです。ここで - 文字を指定すると左寄せとなります。
- オプションの数字。これは表示幅指定子です。 結果を（最低）何桁にするかを指定します。
- オプションの精度指定子。これは、 浮動小数点数に対して数字を何桁まで表示するかを指定します。 文字列に対して使用した場合は、これは切り捨て位置として働きます。 この文字数を超える文字を切り捨てられます。
型指定子。引数を何の型として扱うかを指定します。 指定できる型を以下に示します。
% - パーセント文字。引数は不要です。 b - 引数を整数として扱い、 バイナリの数値として表現します。 c - 引数を整数として扱い、その ASCII 値の文字として表現します。 d - 引数を整数として扱い、 10 進数として表現します。 e - 引数を科学記法として扱います (例 1.2e+2)。 精度の指定子は、PHP 5.2.1 以降では小数点以下の桁数を表します。 それより前のバージョンでは、有効数字の桁数 (ひとつ小さい値) を意味していました。 u - 引数を整数として扱い、符号無しの 10 進数として表現します。 f - 引数を double として扱い、 浮動小数点数として表現します。 F - 引数を float として扱い、 浮動小数点数として表現します (ロケールに依存しません)。 PHP 4.3.10 および PHP 5.0.3 以降で使用可能です。 o - 引数を整数として扱い、 8 進数として表現します。 s - 引数を文字列として扱い、表現します。 x - 引数を整数として扱い、16 進数として (小文字で)表現します。 X - 引数を整数として扱い、16 進数として (大文字で)表現します。
PHP 4.0.6 以降、フォーマット文字列における引数の 番号付け/交換 がサポートされました。以下に例を示します。
この出力は、"There are 5 monkeys in the tree" のようになります。 ここで、フォーマット文字列が別のファイルにある場合を考えてみましょう。 これは、出力を国際化したりする場合に行われる可能性があります。 たとえばフォーマット文字列が次のように書き換えられたとすると、
ここで、問題が発生します。フォーマット文字列における置換指示子の順番は、 コードにおける引数の順番と一致していません。 だからといってコードを変更するのではなく、 むしろ置換指示子が参照するフォーマット文字列のほうで指示を行う方が望ましいでしょう。 フォーマット文字列を次のように書き換えてみましょう。
例 2381. 引数の交換
<?php
$format = 'The %2$s contains %1$d monkeys';
printf($format, $num, $location);
?>
こうすることによるもうひとつの利点は、 同じ置換指示子を複数回使用する際にコードに引数を追加せずにすむことです。 例えば、次のようになります。
例 2382. 引数の交換
<?php
$format = 'The %2$s contains %1$d monkeys.
That\'s a nice %2$s full of %1$d monkeys.';
printf($format, $num, $location);
?>
printf(), sscanf(), fscanf(), vsprintf(), number_format() も参照ください。
例
例 2383. printf() のさまざまな例
<?php
$n = 43951789;
$u = -43951789;
$c = 65; // ASCII コードの 65 は 'A' です
// %% に注目しましょう。これは、リテラル '%' を文字として出力します
printf("%%b = '%b'\n", $n); // 2 進表現
printf("%%c = '%c'\n", $c); // ascii 文字を表示します。chr() 関数と同じです
printf("%%d = '%d'\n", $n); // 標準の整数表現
printf("%%e = '%e'\n", $n); // 科学記法
printf("%%u = '%u'\n", $n); // 正の整数の、符号なし整数表現
printf("%%u = '%u'\n", $u); // 負の整数の、符号なし整数表現
printf("%%f = '%f'\n", $n); // 浮動小数点表現
printf("%%o = '%o'\n", $n); // 8 進表現
printf("%%s = '%s'\n", $n); // 文字列表現
printf("%%x = '%x'\n", $n); // 16 進表現 (小文字)
printf("%%X = '%X'\n", $n); // 16 進表現 (大文字)
printf("%%+d = '%+d'\n", $n); // 正の整数に符号指定子を使用
printf("%%+d = '%+d'\n", $u); // 負の整数に符号指定子を使用
?>
このプログラムの出力内容は次のようになります。
%b = '10100111101010011010101101'
%c = 'A'
%d = '43951789'
%e = '4.39518e+7'
%u = '43951789'
%u = '4251015507'
%f = '43951789.000000'
%o = '247523255'
%s = '43951789'
%x = '29ea6ad'
%X = '29EA6AD'
%+d = '+43951789'
%+d = '-43951789'
例 2384. printf() の文字列指定子
<?php
$s = 'monkey';
$t = 'many monkeys';
printf("[%s]\n", $s); // 標準の文字列出力
printf("[%10s]\n", $s); // 空白を使用して右詰め
printf("[%-10s]\n", $s); // 空白を使用して左詰め
printf("[%010s]\n", $s); // ゼロ埋めは文字列でも可能です
printf("[%'#10s]\n", $s); // ゼロの代わりに独自の文字 '#' で埋めます
printf("[%10.10s]\n", $t); // 左詰めを行い、10 文字以上は切り捨てます
?>
このプログラムの出力内容は次のようになります。
[monkey]
[ monkey]
[monkey ]
[0000monkey]
[####monkey]
[many monke]
例 2386. sprintf: 通貨をフォーマットする例
<?php
$money1 = 68.75;
$money2 = 54.35;
$money = $money1 + $money2;
// echo $money は "123.1" を出力します。
$formatted = sprintf ("%01.2f", $money);
// echo $formatted は "123.10"を出力します
?>
例 2387. sprintf(): 科学記法
<?php
$number = 362525200;
echo sprintf("%.3e", $number); // 3.625e+8 を出力します
?>
sprintf
Igor Butuc
11-Jun-2007 02:08
11-Jun-2007 02:08
Thomas Breuss
11-May-2007 04:03
11-May-2007 04:03
Note:
If you want to use % in sprintf, you have to "quote" it like %%.
Example:
echo sprintf("Green => %d%%'", 50);
Output:
Green => 50%
eagle at electric-force dot net
28-Mar-2007 04:25
28-Mar-2007 04:25
Display an binary string like an Hex Editor.
<?php
function BinToHexView($binstr) {
$HexView = "";
$binpos = 0;
$binsize = strlen($binstr);
$binr = ( ($binsize-$binpos-16) > 16 ? 16 : $binsize-$binpos-16 );
while ($binr > 0) {
$hline = "";
$dline = "";
$HexView .= sprintf("%04x", $binpos);
for ($c=0;$c<$binr;$c++) {
$hline .= sprintf("%02x",ord($binstr[$binpos+$c]))." ";
}
for ($c=0;$c<$binr;$c++) {
$ord = ord($binstr[$binpos+$c]);
$dline .= ( $ord<32 || $ord>126 ? "." : $binstr[$binpos+$c] );
}
$HexView .= sprintf(" %-48s %-16s\n", $hline, $dline);
$binpos += $binr;
$binr = ( ($binsize-$binpos-16) > 16 ? 16 : $binsize-$binpos-16 );
}
return $HexView;
}
?>
30-Jan-2007 03:15
In response to juan at ecogomera dot com:
I think what you want is:
$x = 3327
$y=decbin($x);
echo $y."<br>";
$z = sprintf("%012d", $x);
echo $z;
3327
110011111111
000000003327
Right? You were double-converting the number. First to binary, then again to decimal. You should be converting the source number directly into the required base.
SWestrup
10-Nov-2006 04:46
10-Nov-2006 04:46
In response to Anonymous, who claimed that:
printf("[%s]\n", str_pad('Hello', 20));
and
printf("[%-20s]\n", 'Hello');
are the same thing: you've missed the point.
They're only the same when the amount of padding is a known constant. When its a variable (or an expression), its often much more convenient to be able to write:
printf("[%-*s]\n", 3*$n+2, "Hello");
than what you have to go through now, which is either:
$t = 3*$n+2;
printf("[%-{$t}s]\n","Hello");
or
printf("[%s]\n", str_pad('Hello', 3*$n+2));
Anonymous
17-Oct-2006 08:04
17-Oct-2006 08:04
In response to Fredrik Rambris in the com top domain:
<?php
//Your code:
printf("[%s]\n", str_pad('Hello', 20));
//Is the same as:
printf("[%-20s]\n", 'Hello');
?>
Fredrik Rambris in the com top domain
28-Sep-2006 06:48
28-Sep-2006 06:48
The C implementation of printf (alteast in glibc) can handle field length as arguments like this:
printf("[%-*s]\n", (int)20, "Hello");
To have the same result in PHP you need to run
printf("[%s]\n, str_pad("Hello", 20) );
It would be nice if one could use the field length directly like in C.
Moore (at) Hs-Furtwangen (dot) De
13-Aug-2006 03:54
13-Aug-2006 03:54
Here a litle function that might come handy one time:
It gives back a String and adds a <BR> (you can change it to <br />) to every line end. And it adds $num blanks to the front of the next line.
<?php
function nl2brnl($text, $num)
{
return preg_replace("/\\r\\n|\\n|\\r/", sprintf("% -".(5+$num)."s","<BR>\\n"), $text);
}
$a = " one\\n two\\r\\n three";
$b = nl2brnl($a, 2);
var_dump($b);
/* output will be:
string(30) " one<BR>
two<BR>
three"
*/
echo " <P>\\n ";
echo $b
/* output will be:
<P>
one<BR>
two<BR>
three
*/
?>
Is helpfull for avouding code_soup.
bknakkerNO at SPAMgmail dot com
11-Aug-2006 06:54
11-Aug-2006 06:54
Note that in PHP5 (.1.4 for me) sprintf will not use the __toString function of an object.
<?php
class pr{
private $l;
public function __construct($l)
{
$this->l=$l;
}
public function __toString()
{
return $this->l;
}
}
echo new pr('This works!!'); //This will display 'This works!!'
echo sprintf(new pr('This doesnt')); // will display 'Object'
?>
Be careful with that!
Ulf Wostner
07-Aug-2006 02:35
07-Aug-2006 02:35
<?php
#-----------------------------------------------------
# Viewing Two's Complement using sprintf formatting.
#-----------------------------------------------------
# Systems using Two's Complements have exactly one number that equals its own Two's Complement.
# On a 32-bit system look at 1000 0000 0000 0000 for -2147483648
# Take the one's complement, to get 0111 1111 1111 1111, add 1
# to get the Two's Complement: 1000 0000 0000 0000
# We are back to the original number, the so-called Weird Number for 32-bits.
# For a 64-bit system, format that number as binary, width 64, padded with 0's.
printf("%064b\n", -2147483648);
# Output with added spaces:
# 11111111 11111111 11111111 11111111 10000000 00000000 00000000 00000000
# And here is the Two's Complement on a 64-bit system.
printf("%064b\n", +2147483648);
# Output with added spaces:
# 00000000 00000000 00000000 00000000 10000000 00000000 00000000 00000000
# They share those last 32 bits, accounting for the 32-bit Weird Number.
#----------------------------------------------------------
# Is PHP running 32-bit or 64-bit?
#----------------------------------------------------------
# Sure, we can look at the max int, but The Weird Number also tells if we are in 32-bit, 64-bit, or ...
function getBitCount() {
$how_many_bits = 1; $n = 2;
while(True) {
$how_many_bits += 1; $n *= 2; # powers of 2
# matches its own two's complement?
if( sprintf("%b", $n) == sprintf("%b", -$n) )
return 1 + $how_many_bits;
}
return;
}
?>
egingell at sisna dot com
26-Apr-2006 05:51
26-Apr-2006 05:51
<?
/**
* [string or int] vprint ( string $format [, mixed $ary [, bool $return]] )
*
* Closely mimics the functionality of sprintf(), printf(), vprintf(), and vsprintf().
*
* Replaces %[bcdeufFosxX] with each element of $ary
* See http://us3.php.net/manual/en/function.sprintf.php for details on replacement types.
*
* If there are not enough elements in $ary (or it is left out) to satisfy $format,
* it will be padded to the correct length.
*
* Since v*printf() doesn't mind having too many elements in the array, $format will be left alone.
*
* If $ary is a string, it will be recast into an array.
*
* If $return is set to a value considered to be false (0, '', null, false, and array()),
* then the output will be sent to STDOUT and the strlen() of the output string will be returned;
* otherwise, the output string will be returned.
*
* It's buggy when using the argument swapping functionality, unless you do it propperly.
*
* May break when using modifiers (%.4e, %02s, etc), unless you do it propperly.
**/
function vprint($format, $ary = array(), $return = true) {
// Sanity?!
if (!is_array($ary)) $ary = array($ary);
// Find %n$n.
preg_match_all('#\\%[\\d]*\\$[bcdeufFosxX]#', $format, $matches);
// Weed out the dupes and count how many there are.
$counts = count(array_unique($matches[0]));
// Count the number of %n's and add it to the number of %n$n's.
$countf = preg_match_all('#\\%[bcdeufFosxX]#', $format, $matches) + $counts;
// Count the number of replacements.
$counta = count($ary);
if ($countf > $counta) {
// Pad $ary if there's not enough elements.
$ary = array_pad($ary, $countf, " ");
}
if ($return) {
return vsprintf($format, $ary);
} else {
return vprintf($format, $ary);
}
}
?>
mauf at franzoni dot info
17-Feb-2006 12:21
17-Feb-2006 12:21
The format of floating values has been previously reporting as depending on platform (linux / windows) yet I see it changes within two linux systems depending on the version:
In V4.2.2 "%3.2" displays 3 integers and two decimals (i.e. the first digit represents just the number of integer digits), on V4.4.1 the same displays (and justifies the string to) a three character string (i.e. the first digit is the total lenght of the number, including the decimal dot).
Maybe someone may better specify which version this happens from.
darkfalconIV at hotmail dot com
19-Dec-2005 05:57
19-Dec-2005 05:57
henke dot andersson
You can accomplish feeding it array if you use call_user_func_array. Not exactly a `clean' option, but it does work.
jonybd
14-Nov-2005 11:02
14-Nov-2005 11:02
Time ? Format
<?php
$v_Dur = "66";
$v_Dur = floor($v_Dur/60) . ":" . number_format( fmod(($v_Dur/60)*60,60) ) ;
echo "HH:MM========" . $v_Dur;
echo "<br>";
$v_Dur = "66";
$v_Dur = floor($v_Dur/60) . ":" . sprintf("%02s",number_format( fmod(($v_Dur/60)*60,60) ) );
echo "HH:MM========" . $v_Dur;
?>
tim dot brouckaert dot NOSPAM at gmail dot com
12-Oct-2005 09:35
12-Oct-2005 09:35
If you want to center align some text using the printf or sprintf functions, you can just use the following:
function center_text($word){
$tot_width = 30;
$symbol = "-";
$middle = round($tot_width/2);
$length_word = strlen($word);
$middle_word = round($length_word / 2);
$last_position = $middle + $middle_word;
$number_of_spaces = $middle - $middle_word;
$result = sprintf("%'{$symbol}{$last_position}s", $word);
for ($i = 0; $i < $number_of_spaces; $i++){
$result .= "$symbol";
}
return $result;
}
$string = "This is some text";
print center_text($string);
off course you can modify the function to use more arguments.
webmaster at cafe-clope dot net
15-Aug-2005 01:47
15-Aug-2005 01:47
trying to fix the multibyte non-compliance of sprintf, I came to that :
<?php
function mb_sprintf($format) {
$argv = func_get_args() ;
array_shift($argv) ;
return mb_vsprintf($format, $argv) ;
}
function mb_vsprintf($format, $argv) {
$newargv = array() ;
preg_match_all("`\%('.+|[0 ]|)([1-9][0-9]*|)s`U", $format, $results, PREG_SET_ORDER) ;
foreach($results as $result) {
list($string_format, $filler, $size) = $result ;
if(strlen($filler)>1)
$filler = substr($filler, 1) ;
while(!is_string($arg = array_shift($argv)))
$newargv[] = $arg ;
$pos = strpos($format, $string_format) ;
$format = substr($format, 0, $pos)
. ($size ? str_repeat($filler, $size-strlen($arg)) : '')
. str_replace('%', '%%', $arg)
. substr($format, $pos+strlen($string_format))
;
}
return vsprintf($format, $newargv) ;
}
?>
handle with care :
1. that function was designed mostly for utf-8. i guess it won't work with any static mb encoding.
2. my configuration sets the mbstring.func_overload configuration directive to 7, so you may wish to replace substr, strlen, etc. with mb_* equivalents.
3. since preg_* doesn't complies with mb strings, I used a '.+' in the regexp to symbolize an escaped filler character. That means, %'xy5s pattern will match, unfortunately. It is recomended to remove the '+', unless you are intending to use an mb char as filler.
4. the filler fills at left, and only at left.
5. I couldn't succeed with a preg_replace thing : the problem was to use the differents lengths of the string arguements in the same replacement, string or callback. That's why the code is much longuer than I expected.
6. The pattern wil not match any %1\$s thing... just was too complicated for me.
7. Although it has been tested, and works fine within the limits above, this is much more a draft than a end-user function. I would enjoy any improvment.
The test code below shows possibilities, and explains the problem that occures with an mb string argument in sprintf.
<?php
header("content-type:text/plain; charset=UTF-8") ;
$mb_string = "x�x�x" ;
echo sprintf("%010s", $mb_string), " [octet-size: ", str_sizeof($mb_string) , " ; count: ", strlen(sprintf("%010s", $mb_string)), " characters]\n" ;
echo mb_sprintf("%010s", $mb_string), " [octet-size: ", str_sizeof($mb_string) , " ; count: ", strlen(mb_sprintf("%010s", $mb_string)), " characters]\n" ;
echo "\n" ;
echo mb_sprintf("%''10s\n%'010s\n%'�10s\n%10d\n%'x10s\n%010s\n% 10s\n%010s\n%'1s\n", "zero", "one", "two", 3, "four", "��ve", "%s%i%x", "��ve�", "eight") ;
?>
david at rayninfo dot co dot uk
17-Jun-2005 03:33
17-Jun-2005 03:33
Using sprintf to force leading leading zeros
foreach (range(1, 10) as $v) {echo "<br>tag_".sprintf("%02d",$v);}
displays
tag_01
tag_02
tag_03
.. etc
ian dot w dot davis at gmail dot com
30-May-2005 11:03
30-May-2005 11:03
Just to elaborate on downright's point about different meanings for %f, it appears the behavior changed significantly as of 4.3.7, rather than just being different on different platforms. Previously, the width specifier gave the number of characters allowed BEFORE the decimal. Now, the width specifier gives the TOTAL number of characters. (This is in line with the semantics of printf() in other languages.) See bugs #28633 and #29286 for more details.
Pacogliss
02-May-2005 04:08
02-May-2005 04:08
Just a reminder for beginners : example 6 'printf("[%10s]\n", $s);' only works (that is, shows out the spaces) if you put the html '<pre></pre>' tags ( head-scraping time saver ;-).
christian at wenz dot org
18-Apr-2005 04:20
18-Apr-2005 04:20
@ henke dot andersson at comhem dot se: Use vprintf()/vsprintf() for that.
henke dot andersson at comhem dot se
16-Apr-2005 12:07
16-Apr-2005 12:07
Mind that it doesn't allow you to use a array as multiple arguments like this:
<?php
printf('%s %s',array('a','b')) ?>
downright at comcast dot net
01-Feb-2005 07:03
01-Feb-2005 07:03
Just thought I'd give a heads up for anyone doing cross platform applications.
sprintf spacing is different numerically with Windows and Linux.
Linux aligned correctly:
$ol = sprintf ("%-6s|%11.2f|%11.2f|%11.2f|%11.2f|%11.2f|%11.2f|%11.2f|%11.2f\n",
Windows aligned correctly:
$ol = sprintf ("%-6s|%14.2f|%14.2f|%14.2f|%14.2f|%14.2f|%14.2f|%14.2f|%14.2f\n",
As you can see the strings are fine for spacing, however, the numbers need a difference of 3 in order to have the same amount of spaces.
I noticed this after using sprintf to format a header for a web app I was working on. On windows it fit, however, when it came to linux it was MUCH larger than the header.
jrpozo at conclase dot net
22-Jan-2005 12:13
22-Jan-2005 12:13
Be careful if you use the %f modifier to round decimal numbers as it (starting from 4.3.10) will no longer produce a float number if you set certain locales, so you can't accumulate the result. For example:
setlocale(LC_ALL, 'es_ES');
echo(sprintf("%.2f", 13.332) + sprintf("%.2f", 14.446))
gives 27 instead of 27.78, so use %F instead.
timo at frenay dot net
11-Jan-2005 03:58
11-Jan-2005 03:58
Note that the documentation is unclear about the details of the sign specifier. First of all, the character for this is "+".
Also note that the following does NOT print "+00.00" as you might expect:
<?php
printf('%+02.2f', 0);
?>
The sign is included in the width. This can't be solved by increasing the width:
<?php
printf('%+03.2f', 0);
?>
This will put the padding 0 before the sign.
Here is a possible solution:
<?php
$value = 0;
printf('%s%02.2f', ($value < 0) ? '-' : '+', abs($value));
?>
Gkeeper80
12-Aug-2004 07:58
12-Aug-2004 07:58
When using sprintf with padding, it's important to note that specifying the length of your padding does not restrict the length of your output.
For example:
$var = 'test';
$output sprintf("%03s", $var);
print $output;
Produces:
test
NOT:
est
This may seem intuitive for working with numbers, but not neccesarily when working with strings.
rex
16-Jun-2004 06:47
16-Jun-2004 06:47
Note, if you are just looking for something to pad out a string consider str_pad.
From testing, it seems faster and was more intuitive to use (for example, making it pad the begining or end of a string... with sprintf you would have to use negative indexes)
php at sharpdreams dot com
09-May-2004 06:13
09-May-2004 06:13
Note that when using the argument swapping, you MUST number every argument, otherwise sprintf gets confused. This only happens if you use number arguments first, then switch to a non-numbered, and then back to a numbered one.
<?php
$sql = sprintf( "select * from %1\$s left join %2\$s on( %1\$s.id = %2\$s.midpoint ) where %1\$s.name like '%%%s%%' and %2\$s.tagname is not null", "table1", "table2", "bob" );
// Wont work:
// Sprintf will complain about not enough arguments.
$sql = sprintf( "select * from %1\$s left join %2\$s on( %1\$s.id = %2\$s.midpoint ) where %1\$s.name like '%%%3\$s%%' and %2\$s.tagname is not null", "table1", "table2", "bob" );
// Will work: note the %3\$s
?>
tobias at silverxnet dot de
17-Apr-2004 11:09
17-Apr-2004 11:09
Regarding the previous posting:
I just wanted to give an explanation. This should be because the float to string / integer to string conversion (you are using a string, multiplying it with a float value what php automatically causes to convert the string to a float value). This is a general "problem" (or not), but not that hard to explain.
Where an integer or float starts with 0, in a string it does obviously with 1. So if you are using a string your value will increase by one (You started with a string, so it does not increase but contain the real result. If you start using a float value by not using '' around the value, you have to output the float value as well. This is just the PHP conversion.)
Try putting
$x = strval( $x );
after
$x = $x * 100;
and using your example again. You will see that the output will change to 13664 = 13664 because of the general string conversion. It seems that PHP is converting a float to a string by inceasing by one. By doing the same with intval instead of strval the output changes to 13663 = 13663.
! sprintf seems to behave wrong when using the conversation to an integer value and NOT doing the conversation at all. So use intval to convert to an integer value or strval to convert to a string value BEFORE using sprintf. This should be solving the problems.
kekec at kukac dot hu
30-Mar-2004 02:16
30-Mar-2004 02:16
A really working one:
<?php
function cutzero($value) {
return preg_replace("/(\.?)0+$/", "", $value);
}
?>
06-Mar-2004 03:54
both of your cut-zero functions are just way too complicated. if it's a string where only the zeros at the end should be truncated, why not use a syntax as simple as rtrim("4.7000","0") ?
martin at schwedes dot com
10-Jul-2003 07:45
10-Jul-2003 07:45
decision within sprintf:
$a = "today";
$b = sprintf('This is %s', $a=='today' ? 'today':'not today');
echo $b;
// result: This is today
Rene dot Leonhardt at agritec24 dot com
17-May-2003 02:02
17-May-2003 02:02
Your cutzero function could be faster ;-)
return (double)$value;
But if you must have a function:
return preg_replace('/0+$/', '', $value);
kouber at php dot net
08-May-2003 06:55
08-May-2003 06:55
If you want to cut all the zeros off the end of a float, but not losing any sensitive information, use this:
<?
function cutzero($value) {
return preg_replace("/(\.\d+?)0+$/", "$1", $value)*1;
}
?>
Some examples:
<?
cutzero("4.7600"); // returns 4.76
cutzero("4.7604") // returns 4.7604
cutzero("4.7000"); // returns 4.7
cutzero("4.0000"); // returns 4
?>
info at nospam dot webtip dot dk
18-Feb-2003 10:06
18-Feb-2003 10:06
If you want to format a phonenumber with spaces, use chunk_split() which splits a string into smaller chunks. It's much simpler than using sprintf.
$phone = "12345678";
chunk_split ($phone, 2);
will return 12 34 56 78
moritz dot geselle at invision-team dot de
03-Dec-2002 07:52
03-Dec-2002 07:52
a little note to the argument swapping examples which took me a while to get:
if you use single quotes for the format string (like you should do, since there aren't any variable conversions to do as long as you don't need any special chars), the given examples won't work because of the backslash before the $ (needs to be escaped in double quoted strings - but not in single quoted!)
so this:
$format = "The %2\$s contains %1\$d monkeys";
printf($format,$num,$location);
with a single quoted format string would look like this:
$format = 'The %2$s contains %1$d monkeys';
printf($format,$num,$location);
(no escapes)
I hope that helps to avoid confusion ;)
no dot email dot address at example dot com
16-Sep-2002 10:29
16-Sep-2002 10:29
Using argument swapping in sprintf() with gettext: Let's say you've written the following script:
<?php
$var = sprintf(gettext("The %2\$s contains %1\$d monkeys"), 2, "cage");
?>
Now you run xgettext in order to generate a .po file. The .po file will then look like this:
#: file.php:9
#, ycp-format
msgid "The %2\\$s contains %1\\$d monkeys"
msgstr ""
Notice how an extra backslash has been added by xgettext.
Once you've translated the string, you must remove all backslashes from the ID string as well as the translation, so the po file will look like this:
#: file.php:9
#, ycp-format
msgid "The %2$s contains %1$d monkeys"
msgstr "Der er %1$d aber i %2$s"
Now run msgfmt to generate the .mo file, restart Apache to remove the gettext cache if necessary, and you're off.
abiltcliffe at bigfoot.com
11-Sep-2002 03:01
11-Sep-2002 03:01
To jrust at rustyparts.com, note that if you're using a double-quoted string and *don't* escape the dollar sign with a backslash, $s and $d will be interpreted as variable references. The backslash isn't part of the format specifier itself but you do need to include it when you write the format string (unless you use single quotes).
Andrew dot Wright at spamsux dot atnf dot csiro dot au
03-Jul-2002 06:22
03-Jul-2002 06:22
An error in my last example:
$b = sprintf("%30.s", $a);
will only add enough spaces before $a to pad the spaces + strlen($a) to 30 places.
My method of centering fixed text in a 72 character width space is:
$a = "Some string here";
$lwidth = 36; // 72/2
$b = sprintf("%".($lwidth + round(strlen($a)/2)).".s", $a);
eden_zero_x at hotmail dot com
27-Jun-2002 06:05
27-Jun-2002 06:05
Well I came up with this one, extremely simple. instead of writing <span class="class">hello</a>
you can write: print class('class','hello'); using sprintf
-----------------------------
function class_ ($class, $text=false)
{
return sprintf ("<span class=\"%s\">%s</span>",
$class,
($text ? $text : $class)
);
}
-----------------------------
shgyn at binabakti dot or dot id
01-Jun-2002 11:57
01-Jun-2002 11:57
Previously submitted sci() function to get scientific representation of a number is not working with 0 and negative numbers. So, here is the modified version:
function sci($x, $d=-1) {
$min=($x<0)?"-":"";
$x=abs($x);
$e=floor(($x!=0)?log10($x):0);
$x*=pow(10,-$e);
$fmt=($d>=0)?".".$d:"";
$e=($e>=0)?"+".sprintf("%02d",$e):"-".sprintf("%02d",-$e);
return sprintf("$min%".$fmt."fe%s",$x,$e);
}
fuchschr at surfeu dot at
21-Feb-2002 01:54
21-Feb-2002 01:54
To have a string with leading zeros use this:
$string_i = sprintf("%04s",$value)
Gives you an output with leading zeros and 4 digits.
i.e.
0001
0002
...
0010
an so on
cv at corbach dot de
11-Feb-2002 12:36
11-Feb-2002 12:36
To make radu.rendec@ines.ro's excellent function work on signed numbers you must change the first line to:
$e = floor(log10(abs($x)));
radu dot rendec at ines dot ro
09-Jan-2002 11:49
09-Jan-2002 11:49
The 'e' format specifier is not documented. However, it seems to work, but without showing the exponential part of the number.
This is a function to get the scientific representation of a number:
function sci($x, $d=-1) {
$e=floor(log10($x));
$x*=pow(10,-$e);
$fmt=($d>=0)?".".$d:"";
$e=($e>=0)?"+".sprintf("%02d",$e):"-".sprintf("%02d",-$e);
return sprintf("%".$fmt."fe%s",$x,$e);
}
It takes the number as the first parameter and the precision as the second. The precision is optional. The default precision for the 'f' format specifier is used if no precision is specified.
anqmb(at)yahoo.co.jp
05-Dec-2001 09:51
05-Dec-2001 09:51
Watch out the mysterious rounding rule.
<?php
$a = 4.5;
$b = sprintf("%d",$a);
$c = 4.5;
$d = sprintf("%.0f",$c);
$e = 0.45;
$f = sprintf("%.1f",$e);
print ("$b,$d,$f\n");
?>
The code above prints "4,5,0.5".
(Perl version prints "4,4,0.5".)
keeper at odi dot com dot br
27-Nov-2001 02:26
27-Nov-2001 02:26
Took me a while to find this out.
hope will save someones time.
IT ADD A CARACRER TO THE END OF A STRING
$x = sprintf("%'x-10s", "a");
echo $x;
target_rex at hotmail dot com
15-Apr-2001 11:20
15-Apr-2001 11:20
$a = 5;
// $a is a int
echo $5;
// Outputs:"5";
// If you would like to print $a as a bin,(101) like: 00000101 (8 digits)
sprintf("%8b", $a) // Witch returns exatly 00000101 (8 digits)
// My function looked like:
//////////////////////////////////////////
// By DrRex - www.DrRex.dk - 15/04-2001 //
// string bin(int dec) //
//////////////////////////////////////////
function bin($dec){
$bin = sprintf("%8b", $dec);
return $bin;
}
//////////////////////////////////////////
// Very short exampels how to use bin()
echo "\n1. 128(10) == ".bin(128)."(2)";
$hits = 100;
echo "\n2. Loaded ".bin($hits)."(2) times! Bib!";
// Not very usefull, nobody understands the number, exept if small counters like this one. If it wasn't 8(2) but FFFFFF(16) digits. I would give up...
// This would output:
1. 128(10) == 10000000(2)
2. Loaded 01100100(2) times! Bib!
-------------------------------------------------
Greetings from Christiania, Copenhagen, Denmark!
All code by DrRex
www.DrRex.dk
tjchamberlain.hotmail@com
26-Mar-2001 04:16
26-Mar-2001 04:16
It is worth noting that "%5.2f" will result in a string 8 characters long (5 then the '.' then 2), not 5 characters as you might expect.
prolixmp3 at navigators dot lv
24-Mar-2001 03:55
24-Mar-2001 03:55
If you are going to create a counter which uses _symbols_ before actual digits (see, f.e., SpyLog.com counters - they are filling space with "." before, so the count like 12345 looks like "........12345"), you can use the following:
$txt = "Abracadabra"; // actual string
$fit = 16; // how many digits to use
$fill = "."; // what to fill
$digits = sprintf ("%'{$fill}{$fit}s", $txt);
Paul (a.k.a. Mr.Prolix)
voudras at nospam dot swiftslayer dot org
17-Nov-2000 11:58
17-Nov-2000 11:58
Little note about sprintf and its ilk.
if you attempt something like
$string = "dingy%sflem%dwombat";
$nbr = 5;
$name = "voudras";
$msg = sprintf("%d $string %s", $nbr, $name);
sprintf will complain about a lack in the number of arguments, this would be because of the %'s in the actual string. This can be a great benifit, but is also rather confusing if you dont realize this feature, and are passing questionable variables to sprintf (for, say perhaps logging). One way around this is using
ereg_replace("%","%%", $string); before
sending it off to sprintf. This is actually how i came across this as a problem - i had realized some time ago that i would have to test my $string for
%'s, but when running the %->%% replacement on a very large serialized object, my application timed out.
My solution was to use
sprintf("%d %s %s", $nbr, $string, $name);
but, there was a reason i originally had done this the other way - i suppose i'll find out soon enough
paolini at kahuna dot sdsu dot edu
14-Apr-1999 05:12
14-Apr-1999 05:12
Hey folks, don't forget to prefix a precision specifier with a period '.'!
Thus, to print a floating point number,
say $x, with two digits after the decimal point you would write:
printf( "%.2f", $x );