posts_clauses хук-фильтр . WP 3.1.0

Filters all query clauses at once, for convenience.

Covers the WHERE, GROUP BY, JOIN, ORDER BY, DISTINCT, fields (SELECT), and LIMITS clauses.

Использование

add_filter( 'posts_clauses', 'filter_function_name_2308', 10, 2 );
function filter_function_name_2308( $clauses, $this ){
	// filter...

	return $clauses;
}

$clauses(массив)

The list of clauses for the query.

$this(WP_Query)

The WP_Query instance (passed by reference).

Где используется хук

Код хука

...
			 * @param WP_Query $this   The WP_Query instance (passed by reference).
			 */
			$fields = apply_filters_ref_array( 'posts_fields', array( $fields, &$this ) );

			/**
			 * Filters all query clauses at once, for convenience.
			 *
			 * Covers the WHERE, GROUP BY, JOIN, ORDER BY, DISTINCT,
			 * fields (SELECT), and LIMITS clauses.
			 *
			 * @since 3.1.0
			 *
			 * @param array    $clauses The list of clauses for the query.
			 * @param WP_Query $this    The WP_Query instance (passed by reference).
			 */
			$clauses = (array) apply_filters_ref_array( 'posts_clauses', array( compact( $pieces ), &$this ) );

			$where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : '';
			$groupby = isset( $clauses[ 'groupby' ] ) ? $clauses[ 'groupby' ] : '';
			$join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : '';
			$orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : '';
			$distinct = isset( $clauses[ 'distinct' ] ) ? $clauses[ 'distinct' ] : '';
			$fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : '';
			$limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : '';
		}

		/**
		 * Fires to announce the query's current selection parameters.
		 *
		 * For use by caching plugins.
		 *
...