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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 |
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482 | * @type string $name Value of the name attribute to use for the drop-down select element. |
483 | * Default 'parent'. |
484 | * @type string $orderby The field to order by. Default 'name'. |
485 | * @type bool $hierarchical Whether the taxonomy is hierarchical. Default true. |
486 | * @type string $show_option_none Label to display if there are no terms. Default 'None'. |
487 | * } |
488 | * @param string $taxonomy The taxonomy slug. |
489 | * @param string $context Filter context. Accepts 'new' or 'edit'. |
490 | */ |
491 | $dropdown_args = apply_filters( 'taxonomy_parent_dropdown_args', $dropdown_args, $taxonomy, 'new' ); |
492 |
|
493 | wp_dropdown_categories( $dropdown_args ); |
494 | ?> |
495 | <?php if ( 'category' === $taxonomy ) : ?> |
496 | <p><?php _e( 'Categories, unlike tags, can have a hierarchy. You might have a Jazz category, and under that have children categories for Bebop and Big Band. Totally optional.' ); ?></p> |
497 | <?php else : ?> |
498 | <p><?php _e( 'Assign a parent term to create a hierarchy. The term Jazz, for example, would be the parent of Bebop and Big Band.' ); ?></p> |
499 | <?php endif; ?> |
500 | </div> |