public function maybeUpgrade() {
		$taxonomy_version = get_option( 'pressbooks_taxonomy_version', 0 );
		if ( $taxonomy_version < self::VERSION ) {
			$this->upgrade( $taxonomy_version );
			update_option( 'pressbooks_taxonomy_version', self::VERSION );
		}
	}
public function maybeUpgrade() {
		$taxonomy_version = get_option( 'pressbooks_taxonomy_version', 0 );
		if ( $taxonomy_version < self::VERSION ) {
			$this->upgrade( $taxonomy_version );
			update_option( 'pressbooks_taxonomy_version', self::VERSION );
		}
	}
public function maybeUpgrade ( ) { $ taxonomy_version = get_option ( 'pressbooks_taxonomy_version' , 0 ) ; if ( $ taxonomy_version < self :: VERSION ) { $ this -> upgrade ( $ taxonomy_version ) ; update_option ( 'pressbooks_taxonomy_version' , self :: VERSION ) ; } }
Is it time to upgrade?
Is it time to upgrade?