PHP filetype() Function

Return the file type for "test.txt":

<?php
echo filetype("test.txt");
?>

Definition and Usage

The filetype() function returns the file type of a file.

Possible return values:

Note: The result of this function is cached. Use clearstatcache() to clear the cache.

filetype(filename)

Parameter	Description
filename	Required. Specifies the file to check

Return Value:	One of the file types on success, FALSE on failure
PHP Version:	4.0+

Return the file type for /images/:

<?php
echo filetype("/images/");
?>