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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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556 |
|
557 | /** |
558 | * Filters the date query WHERE clause. |
559 | * |
560 | * @since 3.7.0 |
561 | * |
562 | * @param string $where WHERE clause of the date query. |
563 | * @param WP_Date_Query $query The WP_Date_Query instance. |
564 | */ |
565 | return apply_filters( 'get_date_sql', $where, $this ); |
566 | } |
567 |
|
568 | /** |
569 | * Generates SQL clauses to be appended to a main query. |
570 | * |
571 | * Called by the public WP_Date_Query::get_sql(), this method is abstracted |
572 | * out to maintain parity with the other Query classes. |
573 | * |
574 | * @since 4.1.0 |