How to get link suffix in php

How to get the suffix (php) of the executed file my.order.php, 2 methods are listed for reference only:

First get it through parse_url Link information:

<?php
$link="http://www.xxx.com/testweb/my.order.php?abcd=111@qqq=222";
$parseUrl_link=parse_url($link);
print_r($parseUrl_link);

The running result is as follows:

Array
(
    [scheme] => http
    [host] => www.xxx.com
    [path] => /testweb/my.order.php
    [query] => abcd=111@qqq=222
)

Then get the file extension based on the obtained (path) information.

Method 1

Idea: Read the path information through pathinfo and the PATHINFO_EXTENSION parameter, and the output is the file extension.

echo pathinfo($parseUrl_link['path'],PATHINFO_EXTENSION );

Method 2

Idea: Get the information including the last "." and the following through strrchr, and then delete the "." on the left. , the output is the file extension.

echo ltrim(strrchr($parseUrl_link['path'],"."),".");

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