tmpfile

(PHP 4, PHP 5)

tmpfile — Създава временен файл

Описание

resource tmpfile ( void )

Създава времен файл с уникално име в режим за писане и четене (w+) и връща файлов манипулатор.

Файлът автоматично се изтрива, когато се затвори с fclose() или когато скрипта приключи своята работа.

За повече информация консултирайте се с документацията на вашата система за функцията tmpfile(3), а също и stdio.h.

Връщани стойности

Връща файлов манипулатор (подобно на fopen()) или FALSE при грешка.

Примери

Example #1 tmpfile() пример


<?php
$temp = tmpfile();
fwrite($temp, "записваме в файла");
fseek($temp, 0);
echo fread($temp, 1024);
fclose($temp); // това изтрива файла
?>

Примерът по-горе ще изведе:

writing to tempfile

Вж. също

tempnam() - Създава файл с уникално файлово име
sys_get_temp_dir() - Returns directory path used for temporary files

touch

tempnam

[edit] Last updated: Fri, 18 Sep 2009

add a note User Contributed Notes tmpfile

kexianbin at diyism dot com 22-Nov-2011 12:24


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.

o_O Tync 20-Apr-2007 04:26


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 08-Apr-2007 05:46


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 11:02


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 05:53


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 12:05


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 06:14


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.

add a note