How to generate random password with PHP?

Question

Or is there a software to auto generate random passwords?

Answer 1

Memorable password generator

function password($length)
  {
    $vowel = array(
        'a',
        'e',
        'i',
        'o',
        'u',
    );

    $consonant = array(
        'b',
        'c',
        'd',
        'f',
        'g',
        'h',
        'j',
        'k',
        'l',
        'm',
        'n',
        'p',
        'q',
        'r',
        's',
        't',
        'v',
        'w',
        'x',
        'y',
        'z',
    );

    $result = '';
    for ($i = 0; $i < $length; $i++) {
        if ($i % 2 == 0) {
            $result .= $consonant[rand(0, 15)];
        } else {
            $result .= $vowel[rand(0, 4)];
        }
    }

    return $result;
}

The result:

password(8);//kutekaku
password(11);//rahubabatul

Answer 2

I use st_split and implode function:

function genarateKey(){
    $limit= 8;
    $chars= 'abcdefghijklmnopqrstuvxwyz1234567890!@#$%^&*()_+=-[]{}\|ABCDEFGHIJKLMNOPQRSTUVXWYZ';
    $chararray= str_split($chars);
    $gen=array();
    for($i=0;$i<$limit;$i++){
        $index=rand(0,strlen($chars)-1);
        $gen[$i]= $chararray[$index];
    }
    return implode($gen); //converts array to string
}

Answer 3

Here's a simple solution. It will contain lowercase letters and numbers.

substr(str_shuffle(strtolower(sha1(rand() . time() . "my salt string"))),0, $PASSWORD_LENGTH);

Here's A stronger solution randomly generates the character codes in the desired character range for a random length within a desired range.

function generateRandomPassword() {
  //Initialize the random password
  $password = '';

  //Initialize a random desired length
  $desired_length = rand(8, 12);

  for($length = 0; $length < $desired_length; $length++) {
    //Append a random ASCII character (including symbols)
    $password .= chr(rand(32, 126));
  }

  return $password;
}

Answer 4

I want to play the game. The simplest way would be to do:

function rand_passwd( $length = 8, $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' ) {
    return substr( str_shuffle( $chars ), 0, $length );
}

This is pretty much just a modification of the first answer. Specify the characters you want in the second parameters and the length of the password in the first.

Answer 5

This is how I do it.

$pw = ""; 
for ($i = 0; $i < 13; $i++)
{
    $pw .= chr(rand(33, 126));
}

Answer 6

This function will generate more stronger password than most woted solution:

function generatePassword($size=8){
    $p = openssl_random_pseudo_bytes(ceil($size*0.67), $crypto_strong);
    $p = str_replace('=', '', base64_encode($p));
    $p = strtr($p, '+/', '^*');
    return substr($p, 0, $size);      
}

Each character of password will be [A-Z] or [a-z] or ^ or *