Returns the extension by pathinfo

strtolower(pathinfo(abs.php,PATHINFO_EXTENSION));

Lowercase return extension through pathinfo

 

The pathinfo () function returns the file path information in the form of an array.

pathinfo (path, options) path: To check the specified path.

options: Optional. The provisions of the array elements to return. The default is all.

 

Possible values:

PATHINFO_DIRNAME - returns only the directory name dirname

PATHINFO_BASENAME - only to return to the basic name basename

PATHINFO_EXTENSION - return only extension extension