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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 |
|---|---|
| 1338 | break; |
| 1339 | case 'count': |
| 1340 | $orderby = ''; |
| 1341 | $order = ''; |
| 1342 | $selects = array('COUNT(*)'); |
| 1343 | } |
| 1344 | |
| 1345 | $_fields = $fields; |
| 1346 | |
| 1347 | $fields = implode(', ', apply_filters( 'get_terms_fields', $selects, $args )); |
| 1348 | |
| 1349 | $join = "INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id"; |
| 1350 | |
| 1351 | $pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits' ); |
| 1352 | $clauses = apply_filters( 'terms_clauses', compact( $pieces ), $taxonomies, $args ); |
| 1353 | foreach ( $pieces as $piece ) |
| 1354 | $$piece = isset( $clauses[ $piece ] ) ? $clauses[ $piece ] : ''; |
| 1355 | |
| 1356 | $query = "SELECT $fields FROM $wpdb->terms AS t $join WHERE $where $orderby $order $limits"; |