Remember, that open_basedir affects this function. You will get an error:
Warning: tmpfile() [function.tmpfile]: open_basedir restriction in effect. File(/var/tmp) is not within the allowed path(s): ....blablabla =)
tmpfile
(PHP 4, PHP 5)
tmpfile — テンポラリファイルを作成する
説明
resource tmpfile
( void
)
書き込み可のモード (w+) でユニークな名前を有するテンポラリファイルを作成し、 ファイルハンドルを返します。
ファイルが (fclose() を用いて) クローズされた時、 またはスクリプトが終了された際に自動的にファイルが削除されます。
詳細については、関数 tmpfile(3) のシステムドキュメント、およびヘッダファイル stdio.h を参照ください。
返り値
ファイルのハンドルを返します。 これは、 fopen() により返されるハンドルと同じものです。 失敗した場合には FALSE を返します。
例
Example#1 tmpfile() の例
<?php
$temp = tmpfile();
fwrite($temp, "writing to tempfile");
fseek($temp, 0);
echo fread($temp, 1024);
fclose($temp); // ファイルを削除します
?>
上の例の出力は以下となります。
writing to tempfile
tmpfile
o_O Tync
21-Apr-2007 02:26
21-Apr-2007 02:26
oremanj at gmail dot com
09-Apr-2007 03:46
09-Apr-2007 03:46
No, the fseek() is necessary - after writing to the file, the file pointer (I'll use "file pointer" to refer to the current position in the file, the thing you change with fseek()) is at the end of the file, and reading at the end of the file gives you EOF right away, which manifests itself as an empty upload.
Where you might be getting confused is in some systems' requirement that one seek or flush between reading and writing the same file. fflush() satisfies that prerequisite, but it doesn't do anything about the file pointer, and in this case the file pointer needs moving.
-- Josh
zlynx at acm dot org
14-Mar-2007 10:02
14-Mar-2007 10:02
I am fairly sure that the seek just flushes the data from the memory buffers to the file. fflush() should give you the same effect.
06-Sep-2006 03:53
By the way, this function is really useful for libcurl's CURLOPT_PUT feature if what you're trying to PUT is a string. For example:
/* Create a cURL handle. */
$ch = curl_init();
/* Prepare the data for HTTP PUT. */
$putString = "Hello, world!";
$putData = tmpfile();
fwrite($putData, $putString);
fseek($putData, 0);
/* Set cURL options. */
curl_setopt($ch, CURLOPT_URL, "http://www.example.com");
curl_setopt($ch, CURLOPT_PUT, true);
curl_setopt($ch, CURLOPT_INFILE, $putData);
curl_setopt($ch, CURLOPT_INFILESIZE, strlen($putString));
/* ... (other curl options) ... */
/* Execute the PUT and clean up */
$result = curl_exec($ch);
fclose($putData);
curl_close($ch);
03-Aug-2006 10:05
fseek() is important because if you forget about it you will upload empty file...
i had sth like that ^_^
chris [at] pureformsolutions [dot] com
05-Oct-2005 04:14
05-Oct-2005 04:14
I found this function useful when uploading a file through FTP. One of the files I was uploading was input from a textarea on the previous page, so really there was no "file" to upload, this solved the problem nicely:
<?php
# Upload setup.inc
$fSetup = tmpfile();
fwrite($fSetup,$setup);
fseek($fSetup,0);
if (!ftp_fput($ftp,"inc/setup.inc",$fSetup,FTP_ASCII)) {
echo "<br /><i>Setup file NOT inserted</i><br /><br />";
}
fclose($fSetup);
?>
The $setup variable is the contents of the textarea.
And I'm not sure if you need the fseek($temp,0); in there either, just leave it unless you know it doesn't effect it.