The keyword 'use' has two different applications, but the reserved word table links to here. It can apply to namespace constucts: file1: <?php namespace foo; class Cat { static function says() {echo 'meoow';} } ?> file2: <?php namespace bar; class Dog { static function says() {echo 'ruff';} } ?> file3: <?php namespace animate; class Animal { static function breathes() {echo 'air';} } ?> file4: <?p