echo "php gets the current url
";
$url = "http://".$_SERVER ['HTTP_HOST'].$_SERVER['PHP_SELF'];
echo $url;
?>
The following code is: php gets the website root directory
$PHP_SELF=$_SERVER['PHP_SELF'];
$url='http://'.$_SERVER['HTTP_HOST'].substr($PHP_SELF,0,strrpos($PHP_SELF,'/')+1);
echo $url;
?>
-->
php gets visitor information
print_r($_SERVER['CERT_SERIALNUMBER']);
print_r($_SERVER);
?>
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
