<?php
/**
* 隐藏手机号中间4位
* @param $phone
* @return mixed
*/
function hidetel($phone){
    $IsWhat&nbsp;=&nbsp;preg_match(&#39;/(0[0-9]{2,3}[-]?[2-9][0-9]{6,7}[-]?[0-9]?)/i&#39;,$phone); 
    if($IsWhat == 1){
        return preg_replace('/(0[0-9]{2,3}[-]?[2-9])[0-9]{3,4}([0-9]{3}[-]?[0-9]?)/i','$1****$2',$phone);
    }else{
        return  preg_replace('/(1[3587]{1}[0-9])[0-9]{4}([0-9]{4})/i','$1****$2',$phone);
    }
}
?>