Passwords

simple password generator

Type:	code fragment
Added by:	halcyon_42
Entered:	18/05/2000
Last modified:	08/12/1999
Rating:	(16 votes)
Views:	10404

This simple function returns a randomly generated password ideal for websites which auto-generate their user's passwords. I have created it such that it excludes certain characters which may look ambiguous on a webpage i, I, 1, | etc. This you may customize.

<?

                            
 function return_password () {

                            
 // set password length
 $pw_length = 8;
 // set ASCII range for random character generation
 $lower_ascii_bound = 50;          // "2"
 $upper_ascii_bound = 122;       // "z"

                                       

                                    // Exclude special characters and some confusing alphanumerics

                                    // o,O,0,I,1,l etc

                                    $notuse = array (58,59,60,61,62,63,64,73,79,91,92,93,94,95,96,108,111);

                            

                                    while ($i < $pw_length) {

                                            mt_srand ((double)microtime() * 1000000);

                                            // random limits within ASCII table

                                            $randnum = mt_rand ($lower_ascii_bound, $upper_ascii_bound);

                                            if (!in_array ($randnum, $notuse)) {

                                                    $password = $password . chr($randnum);

                                                    $i++;

                                            }

                                    }

                            

                            return $password;

                            }

                            
 ?>

Usage Example

usage: $new_password = return_password();

                            

                            Sample generated passwords: 2X5bjj2z, ERgid62Y, p2sHtDPv

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