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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 |
|---|---|
| 2602 | $orderby = 'ORDER BY ' . $orderby; |
| 2603 | |
| 2604 | $found_rows = ''; |
| 2605 | if ( !$q['no_found_rows'] && !empty($limits) ) |
| 2606 | $found_rows = 'SQL_CALC_FOUND_ROWS'; |
| 2607 | |
| 2608 | $this->request = $old_request = "SELECT $found_rows $distinct $fields FROM $wpdb->posts $join WHERE 1=1 $where $groupby $orderby $limits"; |
| 2609 | |
| 2610 | if ( !$q['suppress_filters'] ) { |
| 2611 | $this->request = apply_filters_ref_array( 'posts_request', array( $this->request, &$this ) ); |
| 2612 | } |
| 2613 | |
| 2614 | if ( 'ids' == $q['fields'] ) { |
| 2615 | $this->posts = $wpdb->get_col($this->request); |
| 2616 | |
| 2617 | return $this->posts; |
| 2618 | } |
| 2619 | |
| 2620 | if ( 'id=>parent' == $q['fields'] ) { |