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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 |
---|---|
2382 | if ( !$q['suppress_filters'] ) { |
2383 | /** |
2384 | * Filters the WHERE clause of the query. |
2385 | * |
2386 | * @since 1.5.0 |
2387 | * |
2388 | * @param string $where The WHERE clause of the query. |
2389 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
2390 | */ |
2391 | $where = apply_filters_ref_array( 'posts_where', array( $where, &$this ) ); |
2392 |
|
2393 | /** |
2394 | * Filters the JOIN clause of the query. |
2395 | * |
2396 | * @since 1.5.0 |
2397 | * |
2398 | * @param string $where The JOIN clause of the query. |
2399 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
2400 | */ |