PHP tempnam() Function
 Complete PHP Filesystem Reference
Definition and Usage
The tempnam() function creates a temporary file with a unique filename in the specified directory.
This function returns the new temporary filename, or FALSE on failure.
Syntax
tempnam(dir,prefix)
| Parameter | Description | 
|---|---|
| dir | Required. Specifies the directory of where to create the temp file | 
| prefix | Required. Specifies the start of the filename | 
Tips and Notes
Note: If the specified directory does not exist, tempnam() may generate a file in the system's temporary directory.
Tip: See also tmpfile()
Example
<?php
echo tempnam("C:\inetpub\testweb","TMP0");
?> 
The output of the code above could be:
C:\inetpub\testweb\TMP1.tmp
 Complete PHP Filesystem Reference

