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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 |
|---|---|
| 2145 | if ( ! isset($q['meta_compare']) || empty($q['meta_compare']) || ! in_array($q['meta_compare'], array('=', '!=', '>', '>=', '<', '<=')) ) |
| 2146 | $q['meta_compare'] = '='; |
| 2147 | |
| 2148 | $where .= $wpdb->prepare("AND $wpdb->postmeta.meta_value {$q['meta_compare']} %s ", $q['meta_value']); |
| 2149 | } |
| 2150 | |
| 2151 | // Apply filters on where and join prior to paging so that any |
| 2152 | // manipulations to them are reflected in the paging by day queries. |
| 2153 | if ( !$q['suppress_filters'] ) { |
| 2154 | $where = apply_filters('posts_where', $where); |
| 2155 | $join = apply_filters('posts_join', $join); |
| 2156 | } |
| 2157 | |
| 2158 | // Paging |
| 2159 | if ( empty($q['nopaging']) && !$this->is_singular ) { |
| 2160 | $page = absint($q['paged']); |
| 2161 | if (empty($page)) { |
| 2162 | $page = 1; |
| 2163 | } |