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 — Creates a temporary file
Description
resource tmpfile
( void
)
Creates a temporary file with a unique name in read-write (w+) mode and returns a file handle .
The file is automatically removed when closed (using fclose()), or when the script ends.
For details, consult your system documentation on the tmpfile(3) function, as well as the stdio.h header file.
Return Values
Returns a file handle, similar to the one returned by fopen(), for the new file, or FALSE on failure.
Examples
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
?>
The above example will output:
writing to tempfile
add a note
User Contributed Notestmpfile
o_O Tync
20-Apr-2007 07:26
20-Apr-2007 07:26
oremanj at gmail dot com
09-Apr-2007 08:46
09-Apr-2007 08:46
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
14-Mar-2007 02:02
14-Mar-2007 02:02
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 08:53
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 03:05
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 09:14
04-Oct-2005 09:14
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.