/** * [hideStar 用戶名、郵箱、手機賬號中間字符串以*隱藏] * @param  [string] $str [傳過來字符串] * @return [string]      [返回帶*字符串] */function hide($str) {     if (strpos($str, '@')) {         $email_array = explode("@", $str);         $PRevfix = (strlen($email_array[0]) < 4) ? "" : substr($str, 0, 3);        $count = 0;         $str = preg_replace('/([/d/w+_-]{0,100})@/', '***@', $str, -1, $count);         $rs = $prevfix . $str;     } else {         $pattern = '/(1[3458]{1}[0-9])[0-9]{4}([0-9]{4})/i';         if (preg_match($pattern, $str)) {             $rs = preg_replace($pattern, '$1****$2', $str);         } else {             $rs = substr($str, 0, 3) . "***" . substr($str, -1);         }     }     return $rs; } $account = "http://blog.csdn.net/u011816231"; $email = "47777777@QQ.com"; $phone = "14045452525";echo hide($account);