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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 |
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650 |
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651 | /** |
652 | * Filters the site query clauses. |
653 | * |
654 | * @since 4.6.0 |
655 | * |
656 | * @param string[] $clauses An associative array of site query clauses. |
657 | * @param WP_Site_Query $query Current instance of WP_Site_Query (passed by reference). |
658 | */ |
659 | $clauses = apply_filters_ref_array( 'sites_clauses', array( compact( $clauses ), &$this ) ); |
660 |
|
661 | $fields = isset( $clauses['fields'] ) ? $clauses['fields'] : ''; |
662 | $join = isset( $clauses['join'] ) ? $clauses['join'] : ''; |
663 | $where = isset( $clauses['where'] ) ? $clauses['where'] : ''; |
664 | $orderby = isset( $clauses['orderby'] ) ? $clauses['orderby'] : ''; |
665 | $limits = isset( $clauses['limits'] ) ? $clauses['limits'] : ''; |
666 | $groupby = isset( $clauses['groupby'] ) ? $clauses['groupby'] : ''; |
667 |
|
668 | if ( $where ) { |