WP_Tax_Query::is_first_order_clause( array $query ): bool
- Since
- 4.1.0
- Source
wp-includes/class-wp-tax-query.php:229
Determines whether a clause is first-order.
Description
A "first-order" clause is one that contains any of the first-order clause keys ('terms', 'taxonomy', 'include_children', 'field', 'operator'). An empty clause also counts as a first-order clause, for backward compatibility. Any clause that doesn't meet this is determined, by process of elimination, to be a higher-order query.
Parameters
$queryarray- Tax query arguments.
Return
bool- Whether the query clause is a first-order clause.
Used by · 3
- WP_Tax_Query::find_compatible_table_alias()Identifies an existing table alias that is compatible with the current query clause.
- WP_Tax_Query::get_sql_for_query()Generates SQL clauses for a single query array.
- WP_Tax_Query::sanitize_query()Ensures the 'tax_query' argument passed to the class constructor is well-formed.
Source
protected static function is_first_order_clause( $query ) { return is_array( $query ) && ( empty( $query ) || array_key_exists( 'terms', $query ) || array_key_exists( 'taxonomy', $query ) || array_key_exists( 'include_children', $query ) || array_key_exists( 'field', $query ) || array_key_exists( 'operator', $query ) ); }History
Introduced in 4.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
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