WP_List_Util::filter( array $args = array(), string $operator = 'AND' ): array

98	public function filter( $args = array(), $operator = 'AND' ) {99		if ( empty( $args ) ) {100			return $this->output;101		}102 103		$operator = strtoupper( $operator );104 105		if ( ! in_array( $operator, array( 'AND', 'OR', 'NOT' ), true ) ) {106			$this->output = array();107			return $this->output;108		}109 110		$count    = count( $args );111		$filtered = array();112 113		foreach ( $this->output as $key => $obj ) {114			$matched = 0;115 116			foreach ( $args as $m_key => $m_value ) {117				if ( is_array( $obj ) ) {118					// Treat object as an array.119					if ( array_key_exists( $m_key, $obj ) && ( $m_value == $obj[ $m_key ] ) ) {120						++$matched;121					}122				} elseif ( is_object( $obj ) ) {123					// Treat object as an object.124					if ( isset( $obj->{$m_key} ) && ( $m_value == $obj->{$m_key} ) ) {125						++$matched;126					}127				}128			}129 130			if ( ( 'AND' === $operator && $matched === $count )131				|| ( 'OR' === $operator && $matched > 0 )132				|| ( 'NOT' === $operator && 0 === $matched )133			) {134				$filtered[ $key ] = $obj;135			}136		}137 138		$this->output = $filtered;139 140		return $this->output;141	}