Session ID

<?
	//----------------------------------------------------
	// Function GetSID()
	//
	// Parameters : $nSize number of caracters, default 24
	// Return value : 24 caracters string
	//
	// Description : This function returns a random string
	// of 24 caracters that can be used to identify users
	// on your web site in a more secure way. You can also 
	// use this function to generate passwords.
	//----------------------------------------------------
	function GetSID ($nSize=24) {
		
		// Randomize
		mt_srand ((double) microtime() * 1000000);
		for ($i=1; $i<=$nSize; $i++) {
			
			// if you wish to add numbers in your string, 
			// uncomment the two lines that are commented
			// in the if statement
			$nRandom = mt_rand(1,30);
			if ($nRandom <= 10) {
				// Uppercase letters
				$sessionID .= chr(mt_rand(65,90));
		//	} elseif ($nRandom <= 20) {
		//		$sessionID .= mt_rand(0,9);
			} else {
				// Lowercase letters
				$sessionID .= chr(mt_rand(97,122));
			}
			
		}		
		return $sessionID;
	}
	// Test the function 
	echo GetSID(16);
?>

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