What are the several ways to get the url extension in php

Obtaining method: 1. Use the "substr(strrchr($url,"."),1)" statement; 2. Use "substr($url,strrpos($url,'.') 1) " statement; 3. Use "pathinfo($url,PATHINFO_EXTENSION)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php gets url extension Name method

Method 1:

Method 2:

 http://localhost/user [basename] => order.php [extension] => php [filename] => order )
	return $p['extension'];
}
echo get_ext2($url);
?>

Method 3:

Method 4:

Method 5:

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