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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 636 | /** |
| 637 | * Filters the terms query SQL clauses. |
| 638 | * |
| 639 | * @since 3.1.0 |
| 640 | * |
| 641 | * @param array $pieces Terms query SQL clauses. |
| 642 | * @param array $taxonomies An array of taxonomies. |
| 643 | * @param array $args An array of terms query arguments. |
| 644 | */ |
| 645 | $clauses = apply_filters( 'terms_clauses', compact( 'fields', 'join', 'where', 'distinct', 'orderby', 'order', 'limits' ), $taxonomies, $args ); |
| 646 | |
| 647 | $fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : ''; |
| 648 | $join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : ''; |
| 649 | $where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : ''; |
| 650 | $distinct = isset( $clauses[ 'distinct' ] ) ? $clauses[ 'distinct' ] : ''; |
| 651 | $orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : ''; |
| 652 | $order = isset( $clauses[ 'order' ] ) ? $clauses[ 'order' ] : ''; |
| 653 | $limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : ''; |
| 654 | |