WP_Meta_Query::is_first_order_clause( array $query )

Determine whether a query clause is first-order.

Description

A first-order meta query clause is one that has either a ‘key’ or a ‘value’ array key.

(bool) Whether the query clause is a first-order clause.

	protected function is_first_order_clause( $query ) {
		return isset( $query['key'] ) || isset( $query['value'] );
	}

Used By
Used By	Description
wp-includes/class-wp-meta-query.php: WP_Meta_Query::sanitize_query()	Ensure the ‘meta_query’ argument passed to the class constructor is well-formed.
wp-includes/class-wp-meta-query.php: WP_Meta_Query::get_sql_for_query()	Generate SQL clauses for a single query array.
wp-includes/class-wp-meta-query.php: WP_Meta_Query::find_compatible_table_alias()	Identify an existing table alias that is compatible with the current query clause.

Changelog
Version	Description
WP-4.1.0	Introduced.