print (get) file extension in PHP

Here, we're going to discuss the PHP pathinfo() function which is useful in getting information about a path. This function returns useful information about a file path including file name, extension, directory, and file base name. The below example explains the usage of pathinfo().

<?php
	$file_data = pathinfo('/path/to/dir/mynewfile.php');
	echo $file_data['basename'], "\n";
	echo $file_data['dirname'], "\n";
	echo $file_data['filename'], "\n";
	//returns the current file extension
	echo $file_data['extension'];
?>

Output

mynewfile.php
/path/to/dir
mynewfile
php