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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 |
|---|---|
| 634 | } |
| 635 | |
| 636 | function set($query_var, $value) { |
| 637 | $this->query_vars[$query_var] = $value; |
| 638 | } |
| 639 | |
| 640 | function &get_posts() { |
| 641 | global $wpdb, $pagenow, $user_ID; |
| 642 | |
| 643 | do_action_ref_array('pre_get_posts', array(&$this)); |
| 644 | |
| 645 | // Shorthand. |
| 646 | $q = &$this->query_vars; |
| 647 | |
| 648 | $q = $this->fill_query_vars($q); |
| 649 | |
| 650 | // First let's clear some variables |
| 651 | $distinct = ''; |
| 652 | $whichcat = ''; |