Automatic Password Generation in PHP

Sometimes you need to generate passwords for customers automatically when a new account is created. This code allows you choose the desired length and strength for the password and it is very flexible.

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<?php
function GeneratePassword($length=8, $strength=0){
$vowels = 'aeuy';
$consonants = 'bdghjmnpqrstvz';
if($strength >= 1) $consonants .= 'BDGHJLMNPQRSTVWXZ';
if($strength >= 2) $vowels .= 'AEUY';
if($strength >= 3) $consonants .= '12345';
if($strength >= 4) $consonants .= '67890';
if($strength >= 5) $vowels .= '@#$%';
$password = '';
$alt = time() % 2;
for($i = 0; $i < $length; $i++){
if($alt == 1){
$password .= $consonants[(rand() % strlen($consonants))];
$alt = 0;
}else{
$password .= $vowels[(rand() % strlen($vowels))];
$alt = 1;
}
}
return $password;
}
?>

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Automatic Password Generation in PHP