You need a file to temporarily hold some data.
Use tmpfile( ) , as in Example 23-10, if the file needs to last only the duration of the running script.
Creating a temporary file with tmpfile( )
If the file needs to last longer, generate a filename with tempnam( ), and then use fopen( ), as in Example 23-11.
Creating a temporary file with tempnam( )
The tmpfile( ) function creates a file with a unique name and returns a filehandle. 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 writable, tempnam( ) uses the system temporary directory'the TMPDIR environment variable in Unix or the TMP environment variable in Windows. Example 7-27 shows what tempnam( ) generates.
Generating a filename with tempnam( )
Example 7-27 prints:
Temporary data will be stored in /tmp/data-GawVoL
Because of the way PHP generates temporary filenames, a file with the filename that 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.
23.2.4. See Also
Documentation on tmpfile( ) at http://www.php.net/tmpfile and on tempnam( ) at http://www.php.net/tempnam.