How to hide the middle four digits of mobile phone number in php

php method to hide the middle four digits of the mobile phone number: 1. Hide the middle four digits of the mobile phone number through the "substr_replace($num,'****',3,4);" method; 2. By automatically Just define the "yc_phone" function to hide the middle four digits.

The operating environment of this article: Windows7 system, PHP7.1 version, DELL G3 computer

php method hides the middle four digits of the mobile phone number

$num = "13966778888"
$str = substr_replace($num,'****',3,4);

//自定义函数手机号隐藏中间四位
function yc_phone($str){
    $str=$str;
    $resstr=substr_replace($str,'****',3,4);
    return $resstr;
}

Usage in thinkphp template:

<span style="font-size:18px;"><volist name="zjd_list" id="vo">
 <p>恭喜用户{$vo.user_id|yc_phone=###}砸金蛋获得奖金{$vo.prize}元</p>
   </volist></span>

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