<?php

if ( !function_exists('sys_get_temp_dir') )
{
    // Based on http://www.phpit.net/
    // article/creating-zip-tar-archives-dynamically-php/2/
    function sys_get_temp_dir()
    {
        // Try to get from environment variable
        if ( !empty($_ENV['TMP']) )
        {
            return realpath( $_ENV['TMP'] );
        }
        else if ( !empty($_ENV['TMPDIR']) )
        {
            return realpath( $_ENV['TMPDIR'] );
        }
        else if ( !empty($_ENV['TEMP']) )
        {
            return realpath( $_ENV['TEMP'] );
        }

        // Detect by creating a temporary file
        else
        {
            // Try to use system's temporary directory
            // as random name shouldn't exist
            $temp_file = tempnam( md5(uniqid(rand(), TRUE)), '' );
            if ( $temp_file )
            {
                $temp_dir = realpath( dirname($temp_file) );
                unlink( $temp_file );
                return $temp_dir;
            }
            else
            {
                return FALSE;
            }
        }
    }
}

?>