tempnam
A clean method to use temporary file:
<?php
$tmp=array_search('uri', @array_flip(stream_get_meta_data($GLOBALS[mt_rand()]=tmpfile())));
file_put_contents($tmp, 'hello');
echo file_get_contents($tmp);
?>
without need to fclose the tmp file, it will be deleted while the php ends.
tmpfile
(PHP 4, PHP 5)
tmpfile — Erstellt eine temporäre Datei
Beschreibung
resource tmpfile
( void
)
Erstellt eine temporäre Datei mit einem eindeutigen Dateinamen im Lese-Schreib-Modus (w+) und gibt einen Dateizeiger zurück.
Die Datei wird automatisch gelöscht, wenn sie geschlossen wird (mit fclose()), oder wenn das Skript beendet wird.
Für Details lesen Sie bitte die Dokumentation zur tmpfile(3)-Funktion und die stdio.h-Header-Datei.
Rückgabewerte
Gibt einen Dateizeiger für die neue Datei zurück, der ähnlich zu dem
Zeiger ist, den fopen() zurückgibt.
Im Fehlerfall wird FALSE zurückgegeben..
Beispiele
Beispiel #1 tmpfile()-Beispiel
<?php
$temp = tmpfile();
fwrite($temp, "schreiben in Temporärdatei");
fseek($temp, 0);
echo fread($temp, 1024);
fclose($temp); // dies entfernt die Datei
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
schreiben in Temporärdatei
Siehe auch
- tempnam() - Erzeugt eine Datei mit eindeutigem Dateinamen
- sys_get_temp_dir() - Returns directory path used for temporary files
add a note
User Contributed Notes
tmpfile
kexianbin at diyism dot com
22-Nov-2011 08:24
o_O Tync
20-Apr-2007 12:26
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 =)
oremanj at gmail dot com
09-Apr-2007 01:46
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
13-Mar-2007 06:02
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.
05-Sep-2006 01:53
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:
<?php
/* 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 08:05
fseek() is important because if you forget about it you will upload empty file...
i had sth like that ^_^
chris [at] pureformsolutions [dot] com
04-Oct-2005 02:14
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.