Friendsnippets

 1 <?php
 2 
 3 /**
 4  * Generate random password
 5  * 
 6  * @param integer $length Length of the generated password
 7  * @param boolean $allow_uppercase
 8  * @param boolean $allow_lowercase
 9  * @param boolean $allow_numbers
10  * @param boolean $allow_special
11  * @param boolean $fix_similar  If true, check if string contains mistakeable chars, add if accepted
12  * @param string $valid_charset
13  * @return string
14  */
15 function rpassword($length = 8, $allow_uppercase = 1, $allow_lowercase = 1, $allow_numbers = 1, $allow_special = 0, $fix_similar = 0, $valid_charset = "") {
16 	// Create a list of usable chars based upon the parameters
17 	if (!$valid_charset) {
18 		if ($allow_uppercase) $valid_charset .= 'ABCDEFGHIJKLMNOPQRSTUVXYZ';
19 		if ($allow_lowercase) $valid_charset .= 'abcdefghijklmnopqrstuvxyz';
20 		if ($allow_numbers) $valid_charset .= '0123456789';
21 		if ($allow_special) $valid_charset .= '!#$%&()*+-./;<=>@\_';
22 	}
23 	// Find the charset length
24 	$charset_length = strlen($valid_charset);
25 	// If no chars is allowed, return false
26 	if ($charset_length == 0) return false;
27 	// Initialize the password and loop till we have all
28 	$password = "";
29 	while(strlen($password) < $length) {
30 		// Pull out a random char
31 		$char = $valid_charset[mt_rand(0, ($charset_length-1))];
32 		
33 		if (($fix_similar && !strpos('O01lI5S', $char)) || !$fix_similar) $password .= $char;
34 	}
35 
36 	return $password;
37 }