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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 |
---|---|
3415 | if ( !$q['suppress_filters'] ) { |
3416 | /** |
3417 | * Filter the completed SQL query before sending. |
3418 | * |
3419 | * @since 2.0.0 |
3420 | * |
3421 | * @param array $request The complete SQL query. |
3422 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
3423 | */ |
3424 | $this->request = apply_filters_ref_array( 'posts_request', array( $this->request, &$this ) ); |
3425 | } |
3426 |
|
3427 | if ( 'ids' == $q['fields'] ) { |
3428 | $this->posts = $wpdb->get_col( $this->request ); |
3429 | $this->posts = array_map( 'intval', $this->posts ); |
3430 | $this->post_count = count( $this->posts ); |
3431 | $this->set_found_posts( $q, $limits ); |
3432 |
|
3433 | return $this->posts; |