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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 |
|---|---|
| 1229 | else if ( 'term_group' == $_orderby ) |
| 1230 | $orderby = 't.term_group'; |
| 1231 | else if ( 'none' == $_orderby ) |
| 1232 | $orderby = ''; |
| 1233 | elseif ( empty($_orderby) || 'id' == $_orderby ) |
| 1234 | $orderby = 't.term_id'; |
| 1235 | else |
| 1236 | $orderby = 't.name'; |
| 1237 | |
| 1238 | $orderby = apply_filters( 'get_terms_orderby', $orderby, $args ); |
| 1239 | |
| 1240 | if ( !empty($orderby) ) |
| 1241 | $orderby = "ORDER BY $orderby"; |
| 1242 | else |
| 1243 | $order = ''; |
| 1244 | |
| 1245 | $order = strtoupper( $order ); |
| 1246 | if ( '' !== $order && !in_array( $order, array( 'ASC', 'DESC' ) ) ) |
| 1247 | $order = 'ASC'; |