WP_Translation_File_PHP::parse_file()

	protected function parse_file() {
		$this->parsed = true;

		$result = include $this->file;
		if ( ! $result || ! is_array( $result ) ) {
			$this->error = 'Invalid data';
			return;
		}

		if ( isset( $result['messages'] ) && is_array( $result['messages'] ) ) {
			foreach ( $result['messages'] as $original => $translation ) {
				$this->entries[ (string) $original ] = $translation;
			}
			unset( $result['messages'] );
		}

		$this->headers = array_change_key_case( $result );
	}