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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 |
---|---|
2510 | if ( ! $q['suppress_filters'] ) { |
2511 | /** |
2512 | * Filters the WHERE clause of the query. |
2513 | * |
2514 | * @since 1.5.0 |
2515 | * |
2516 | * @param string $where The WHERE clause of the query. |
2517 | * @param WP_Query $this The WP_Query instance (passed by reference). |
2518 | */ |
2519 | $where = apply_filters_ref_array( 'posts_where', array( $where, &$this ) ); |
2520 |
|
2521 | /** |
2522 | * Filters the JOIN clause of the query. |
2523 | * |
2524 | * @since 1.5.0 |
2525 | * |
2526 | * @param string $join The JOIN clause of the query. |
2527 | * @param WP_Query $this The WP_Query instance (passed by reference). |
2528 | */ |