PHP Token

Keyword

Token akses function generateRandomString randomString dev random fclose fread trigger_error guidv4 str_split openssl_random_pseudo_bytes random_bytes

<?php
 function get_token($panjang){
  $token = array(
   range(1,9),
   range('a','z'),
   range('A','Z')
  );

  $karakter = array();
  foreach($token as $key=>$val){
   foreach($val as $k=>$v){
    $karakter[] = $v;
   }
  }

  $token = null;
  for($i=1; $i<=$panjang; $i++){
   // mengambil array secara acak
   $token .= $karakter[rand($i, count($karakter) - 1)];
  }

  return $token;
 }

 // panjang 15 karakter
 echo get_token(15);

echo '<hr />';

 // panjang 50 karakter
 echo get_token(50);

function generateRandomString($length = 10) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $charactersLength = strlen($characters);
    $randomString = '';
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[rand(0, $charactersLength - 1)];
    }
    return $randomString;
}

function generateRandomString($len)
{
    $fp = @fopen('/dev/random','rb');
    $result = '';
    if ($fp !== FALSE) {
        $result .= @fread($fp, $len);
        @fclose($fp);
    }
    else
    {
        trigger_error('Can not open /dev/urandom.');
    }
    // convert from binary to string
    $result = base64_encode($result);
    // remove none url chars
    $result = strtr($result, '+/', '-_');
    // Remove = from the end
    $result = str_replace('=', ' ', $result);
    return $result;
}

function guidv4()
{
    if (function_exists('com_create_guid') === true)
        return trim(com_create_guid(), '{}');

    $data = openssl_random_pseudo_bytes(16);
    $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0100
    $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10
    return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
}

<?php
$bytes = random_bytes(5);
$str = bin2hex($bytes);
var_dump($str);
// string(10) "385e33f741" 
?>

<?php
$r = unpack('v*', fread(fopen('/dev/random', 'r'),16));
$uuid = sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
    $r[1], $r[2], $r[3], $r[4] & 0x0fff | 0x4000, 
    $r[5] & 0x3fff | 0x8000, $r[6], $r[7], $r[8]);
?>

Sumber: Cah Biyen