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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 |
|---|---|
| 1716 | /** |
| 1717 | * Filter the ORDERBY clause of the terms query. |
| 1718 | * |
| 1719 | * @since 2.8.0 |
| 1720 | * |
| 1721 | * @param string $orderby ORDERBY clause of the terms query. |
| 1722 | * @param array $args An array of terms query arguments. |
| 1723 | * @param string|array $taxonomies A taxonomy or array of taxonomies. |
| 1724 | */ |
| 1725 | $orderby = apply_filters( 'get_terms_orderby', $orderby, $args, $taxonomies ); |
| 1726 | |
| 1727 | $order = strtoupper( $args['order'] ); |
| 1728 | if ( ! empty( $orderby ) ) { |
| 1729 | $orderby = "ORDER BY $orderby"; |
| 1730 | } else { |
| 1731 | $order = ''; |
| 1732 | } |
| 1733 | |
| 1734 | if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) ) { |