tempnam
fseek() is important because if you forget about it you will upload empty file...
i had sth like that ^_^
tmpfile
(PHP 4, PHP 5)
tmpfile — Crée un fichier temporaire
Description
resource tmpfile
( void
)
Crée un fichier temporaire avec un nom unique, ouvert en écriture et lecture (w+), et retourne un pointeur de fichier.
Ce fichier sera automatiquement effacé lorsqu'il sera fermé (avec fclose()), ou lorsque le script sera terminé.
Pour plus de détails, consultez votre documentation système sur la fonction tmpfile(3), et sur stdio.h.
Valeurs de retour
Retourne un pointeur de fichier, identique à celui retourné
par la fonction fopen(), pour le nouveau
fichier ou FALSE si une erreur survient.
Exemples
Exemple #1 Exemple avec tmpfile()
<?php
$temp = tmpfile();
fwrite($temp, "Écriture dans le fichier temporaire");
fseek($temp, 0);
echo fread($temp, 1024);
fclose($temp); // ceci va effacer le fichier
?>
L'exemple ci-dessus va afficher :
writing to tempfile
Voir aussi
- tempnam() - Crée un fichier avec un nom unique
- sys_get_temp_dir() - Retourne le chemin du répertoire utilisé pour les fichiers temporaires
add a note
User Contributed Notes
tmpfile - [9 notes]
Anonymous ¶
6 years ago
ssandor ¶
6 months ago
Beware that PHP's tmpfile is not an equivalent of unix' tmpfile.
PHP (at least v. 5.3.17/linux I'm using now) creates a file in /tmp with prefix "php", and deletes that file on fclose or script termination.
So, if you want to be sure that you don't leave garbage even in case of a fatal error, or killed process, you shouldn't rely on this function.
Use the classical method of deleting the file after creation:
<?php
$fn = tempnam ('/tmp', 'some-prefix-');
if ($fn)
{
$f = fopen ($fn, 'w+');
unlink ($fn); // even if fopen failed, because tempnam created the file
if ($f)
{
do_something_with_file_handle ($f);
}
}
?>
kexianbin at diyism dot com ¶
11 months ago
If you want to specify the extension name of tmp file:
<?php
$tmp=array_search('uri', @array_flip(stream_get_meta_data($GLOBALS[mt_rand()]=tmpfile())));
rename($tmp, $tmp.='.png');
register_shutdown_function(create_function('', "unlink('{$tmp}');"));
?>
oremanj at gmail dot com ¶
6 years ago
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
kexianbin at diyism dot com ¶
1 year ago
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.
Anonymous ¶
6 years ago
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);
?>
chris [at] pureformsolutions [dot] com ¶
7 years ago
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.
zlynx at acm dot org ¶
6 years ago
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.