PHP 8.4.0 RC4 available for testing

tmpfile

(PHP 4, PHP 5, PHP 7, PHP 8)

tmpfileCrea un file temporaneo

Descrizione

tmpfile(): resource

Crea un file temporaneo con un nome univoco in modalità di lettura-scrittura (w+), restituendo un riferimento al file simile a quello tornato da fopen(). Il file viene automaticamente cancellato una volta chiuso (usando fclose()), o quando lo script termina.

Per dettagli, consulta la documentazione del tuo sistema sulla funzione tmpfile(3), così come il file haeader stdio.h.

Example #1 tmpfile() example

<?php
$temp
= tmpfile();
fwrite($temp, "writing to tempfile");
fseek($temp, 0);
echo
fread($temp, 1024);
fclose($temp); // this removes the file
?>

Il precedente esempio visualizzerà:

         writing toi tempfile
         

Vedere anche tempnam().

add a note

User Contributed Notes 6 notes

up
111
bishop
6 years ago
To get the underlying file path of a tmpfile file pointer:

<?php
$file
= tmpfile();
$path = stream_get_meta_data($file)['uri']; // eg: /tmp/phpFx0513a
up
25
chris [at] pureformsolutions [dot] com
19 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.
up
2
divinity76 at gmail dot com
4 years ago
at least on Windows 10 with php 7.3.7, and Debian Linux with php 7.4.2,

the mode is not (as the documentation states) 'w+' , it is 'w+b'

(an important distinction when working on Windows systems)
up
6
Anonymous
8 years ago
Since this function may not be working in some environments, here is a simple workaround:

function temporaryFile($name, $content)
{
$file = DIRECTORY_SEPARATOR .
trim(sys_get_temp_dir(), DIRECTORY_SEPARATOR) .
DIRECTORY_SEPARATOR .
ltrim($name, DIRECTORY_SEPARATOR);

file_put_contents($file, $content);

register_shutdown_function(function() use($file) {
unlink($file);
});

return $file;
}
up
-1
elm at gmail dot nospamplease dot com
5 years ago
To get tmpfile contents:
<?php
$tmpfile
= tmpfile();
$tmpfile_path = stream_get_meta_data($tmpfile)['uri'];
// ... write to tmpfile ...
$tmpfile_content = file_get_contents($tmpfile_path);
?>

Perhaps not the best way for production code, but good enough for logging or a quick var_dump() debug run.
up
-3
oremanj at gmail dot com
17 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
To Top