18.3. Creating a Temporary File
$temp_fh = tmpfile(); // write some data to the temp file fputs($temp_fh,"The current time is ".strftime('%c')); // the file goes away when the script ends exit(1);
$tempfilename = tempnam('/tmp','data-'); $temp_fh = fopen($tempfilename,'w') or die($php_errormsg); fputs($temp_fh,"The current time is ".strftime('%c')); fclose($temp_fh) or die($php_errormsg);
The function tmpfile( ) creates a file with a unique name and returns a file handle. The file is removed when fclose( ) is called on that file handle, or the script ends.
Alternatively, tempnam( ) generates a filename. It takes two arguments: the first is a directory, and the second is a prefix for the filename. If the directory doesn't exist or isn't writeable, tempnam( ) uses the system temporary directory — the TMPDIR environment variable in Unix or the TMP environment variable in Windows. For example:
$tempfilename = tempnam('/tmp','data-'); print "Temporary data will be stored in $tempfilename"; Temporary data will be stored in /tmp/data-GawVoL
Because of the way PHP generates temporary filenames, the filename tempnam( ) returns is actually created but left empty, even if your script never explicitly opens the file. This ensures another program won't create a file with the same name between the time that you call tempnam( ) and the time you call fopen( ) with the filename.
18.3.4. See Also
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