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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 |
---|---|
27 | $category->slug = ''; |
28 |
|
29 | if ( ! isset( $category->parent ) ) |
30 | $category->parent = ''; |
31 |
|
32 | if ( ! isset( $category->description ) ) |
33 | $category->description = ''; |
34 | } |
35 |
|
36 | do_action('edit_category_form_pre', $category); |
37 |
|
38 | _fill_empty_category($category); |
39 | ?> |
40 |
|
41 | <div class="wrap"> |
42 | <?php screen_icon(); ?> |
43 | <h2><?php _e('Edit Category'); ?></h2> |
44 | <div id="ajax-response"></div> |
45 | <form name="editcat" id="editcat" method="post" action="categories.php" class="validate"> |