Generate a random Password

genPassword.php

<?php
function generatePassword ($length = 8) {
	$password = "";
	$possible = "2346789bcdfghjkmnpqrtvwxyzBCDFGHJKLMNPQRTVWXYZ";

	$maxlength = strlen($possible);

	// check for length overflow and truncate if necessary
	if ($length > $maxlength) {
		$length = $maxlength;
	}

	// set up a counter for how many characters are in the password so far
	$i = 0;

	// add random characters to $password until $length is reached
	while ($i < $length) {

		// pick a random character from the possible ones
		$char = substr($possible, mt_rand(0, $maxlength-1), 1);

		// have we already used this character in $password?
		if (!strstr($password, $char)) {
			// no, so it's OK to add it onto the end of whatever we've already got...
			$password .= $char;
			// ... and increase the counter by one
			$i++;
		}

	}

	// done!
	return $password;

}
?>