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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 |
---|---|
403 | if ( 'category' == $taxonomy ) { |
404 | /** |
405 | * Fires before the Add Category form. |
406 | * |
407 | * @since 2.1.0 |
408 | * @deprecated 3.0.0 Use {$taxonomy}_pre_add_form instead. |
409 | * |
410 | * @param object $arg Optional arguments cast to an object. |
411 | */ |
412 | do_action( 'add_category_form_pre', (object) array( 'parent' => 0 ) ); |
413 | } elseif ( 'link_category' == $taxonomy ) { |
414 | /** |
415 | * Fires before the link category form. |
416 | * |
417 | * @since 2.3.0 |
418 | * @deprecated 3.0.0 Use {$taxonomy}_pre_add_form instead. |
419 | * |
420 | * @param object $arg Optional arguments cast to an object. |
421 | */ |