$key = '1234567890123456';
  

  $content = 'T7UT2NQ1AFvR9unjA0wKWA==';
  

  $desStr = decryptString($content,$key);
  

  echo($desStr);
  

  

  function decryptString($str,$key) {
  

  $str = base64_decode($str);
  

  $str = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $str, MCRYPT_MODE_ECB);
  

  $block = mcrypt_get_block_size('rijndael_128', 'ecb');
  

  $pad = ord($str[($len = strlen($str)) - 1]);
  

  $len = strlen($str);
  

  $pad = ord($str[$len-1]);
  

  return substr($str, 0, strlen($str) - $pad);
  

  }