WAEncrypt method for PHP

  1. function WAEncrypt($src, $key){
      $pkey = $key;
      while (strlen($pkey)<16)
        $pkey .= '0';
      $chars = 'abdefhiknrstyzABDEFGHKNQRSTYZ23456789';
      $numChars = strlen($chars);
      $iv = '';
      for ($i = 0; $i < 16; $i++) {
        $iv .= substr($chars, rand(1, $numChars) - 1, 1);
      }
      $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, 'cbc');
      $pad = $block - (strlen($src) % $block);
      $src .= str_repeat(chr($pad), $pad);  
      $enc = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $pkey, $src, MCRYPT_MODE_CBC, $iv);
      return $iv.'|'.base64_encode($enc);
    }