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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 |
|---|---|
| 724 | } |
| 725 | |
| 726 | function set($query_var, $value) { |
| 727 | $this->query_vars[$query_var] = $value; |
| 728 | } |
| 729 | |
| 730 | function &get_posts() { |
| 731 | global $wpdb, $pagenow, $user_ID; |
| 732 | |
| 733 | do_action_ref_array('pre_get_posts', array(&$this)); |
| 734 | |
| 735 | // Shorthand. |
| 736 | $q = &$this->query_vars; |
| 737 | |
| 738 | $q = $this->fill_query_vars($q); |
| 739 | |
| 740 | // First let's clear some variables |
| 741 | $distinct = ''; |
| 742 | $whichcat = ''; |