<?php
// 获取通过 POST 请求发送过来的数据
$datatemp = file_get_contents("js/data.dat");
$datatemp = json_decode($datatemp);
$select = $_POST['select'];
if ($select == 1) {
  foreach ($datatemp as $item) {
    $item->select = 1;
  }
} else {
  foreach ($datatemp as $item) {
    $item->select = 0;
  }
}
$datatemp = json_encode($datatemp);
file_put_contents("js/data.dat", $datatemp);