PHP解析错误：语法错误，意外＆＃39;内容＆＃39; （T_STRING），期待＆＃39;，＆＃39;或＆＃39;;＆＃39;在/ MYFILE /第16行
我的代码
<?php
session_start();
global $module, $id;
require_once '../includes/connection.php';
include('xcrud/xcrud.php');
$module = $_GET["module"];
$id = $_GET["id"];
include "xcrud/modules/$module.php";
if((!isset ($_SESSION['user']) == true) and (!isset ($_SESSION['password']) == true)){
unset($_SESSION['user']);
unset($_SESSION['password']);
header('location:index.php');
} else {
echo "<!DOCTYPE html>
<html lang='en'>
<head>";
include 'theme/head.html';
echo "</head>
<body>";
include 'theme/bodya.html';
include "modules/$module.php";
include 'theme/bodyb.html';
echo "</body>
</html>";
}
?>