How to replace 13412343312 with 134****3312 in php

How to replace 13412343312 with 134**3312

in php

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How to replace 13412343312 with 134**3312

in php

<code><?php
echo substr_replace ('13412343312','****',3,4) ;
?></code>

To be honest, I just learned PHP on the first day. . . Don’t you mean to get the first 3 digits and last 4 digits of the mobile phone number?

substr_replace('13412343312 ','**',3,6);

Hide commonly used characters in order

<code>//字段文字内容隐藏处理方法
function hidecard($cardnum,$type=1,$default=""){
    if(empty($cardnum)) {
        return $default;
    }
    if($type==1){
        $cardnum = substr($cardnum,0,3).str_repeat("*",12).substr($cardnum,strlen($cardnum)-4);//身份证
    }elseif($type==2){
        $cardnum = substr($cardnum,0,3).str_repeat("*",5).substr($cardnum,strlen($cardnum)-4);//手机号
    }elseif($type==3){
        $cardnum = str_repeat("*",strlen($cardnum)-4).substr($cardnum,strlen($cardnum)-4);//银行卡
    }elseif($type==4){
        $cardnum = substr($cardnum,0,3).str_repeat("*",strlen($cardnum)-3);//用户名
    }elseif($type==5){
        $cardnum = substr($cardnum,0,3).str_repeat("*",3).substr($cardnum,strlen($cardnum)-3);//新用户名
    }
    return $cardnum;
}</code>

<code>13412343312
134****3312
echo substr_replace('13412343312', '****', 3, 4);
3表示从第几个字符开始替换(位置从0开始算起).
4表示替换多少个字符.</code>

<code><?php
echo substr_replace ('13412343312','*',3,7) ;
?></code>

One:substr_replace
Two:preg_replace

Just check the documentation separately

Isn’t this just a replacement? substr_replace

String replacement. . .