PHP以星号隐藏用户名手机和邮箱

 <?php
 class Hidesatr{
     function hide_star_do($str) { //用户名、邮箱、手机账号中间字符串以*隐藏
         if (strpos($str, '@')){
             $email_array = explode("@", $str);
             $prevfix = (strlen($email_array[0]) < 4) ? "" : substr($str, 0, 3); //邮箱前缀
             $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', $str); // substr_replace($name,'****',3,4);
             } else {
                 $rs = substr($str, 0, 3) . "***" . substr($str, -1);
             }
         }
         return $rs;
     }
 }
 $account = "http://www.baidu.com";
 $email = "3093851785@qq.com";
 $phone = "13590381724";
 $hide_str=new Hidesatr();
 echo $hide_str->hide_star_do($account).PHP_EOL;
 echo $hide_str->hide_star_do($email).PHP_EOL;
 echo $hide_str->hide_star_do($phone).PHP_EOL;
 ?>