```php <?php $filename = "index.php";//原版入口文件 $filename1 = "ifintrusion.php";//入口文件模板 $md5file = md5_file($filename); $md5file1 = md5_file($filename1); if ($md5file === $md5file1){ }else{ $myfile = fopen($filename1, "r") or die; $srt= fread($myfile,filesize($filename1)); //echo $srt;die; fclose($myfile); // 写入文件 $myfile1 = fopen($filename, "w") or die; fwrite($myfile1, $srt); fclose($myfile1); // 通知客户邮箱 $seoHtml .= '<script>var xmlhttp; if (window.XMLHttpRequest) { // IE7+, Firefox, Chrome, Opera, Safari 浏览器执行代码 xmlhttp=new XMLHttpRequest(); } else { // IE6, IE5 浏览器执行代码 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById("myDiv").innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","/api/Mailer/index",true); xmlhttp.send(); </script>'; echo $seoHtml; } ```