tempnam
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 — Crea un archivo temporal
Descripción
resource tmpfile
( void
)
Crea un archivo temporal con un nombre único en modo de lectura-escritura (w+) y devuelve un gestor de archivo.
El archivo es eliminado automáticamente cuando sea cerrado (usando fclose()), o cuando el script finalice.
Para más detalles, consulte la documentación de su sistema sobre la función tmpfile(3), así como el archivo de cabecera stdio.h.
Valores retornados
Devuelve un gestor de archivo, similar al que es devuelto por fopen(), para el nuevo archivo, o FALSE en caso de fallo.
Ejemplos
Example #1 Ejemplo de tmpfile()
<?php
$temp = tmpfile();
fwrite($temp, "escribiendo sobre el archivo temporal");
fseek($temp, 0);
echo fread($temp, 1024);
fclose($temp); // esto elimina el archivo
?>
El resultado del ejemplo seria:
escribiendo sobre el archivo temporal
add a note
User Contributed Notestmpfile
o_O Tync
20-Apr-2007 02:26
20-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
13-Mar-2007 10:02
13-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.
05-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
04-Oct-2005 04:14
04-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.