【DASCTF 2020】Ezunserialize 超详细题解，从一个题学习php反序列化字符串逃逸

<?php
show_source("index.php");
function write($data) {
   
   
    return str_replace(chr(0) . '*' . chr(0), '\0\0\0', $data);
}

function read($data) {
   
   
    return str_replace('\0\0\0', chr(0) . '*' . chr(0