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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 |
---|---|
12 |
|
13 | if ( empty($tag_ID) ) { ?> |
14 | <div id="message" class="updated"><p><strong><?php _e( 'You did not select an item for editing.' ); ?></strong></p></div> |
15 | <?php |
16 | return; |
17 | } |
18 |
|
19 | // Back compat hooks |
20 | if ( 'category' == $taxonomy ) { |
21 | do_action( 'edit_category_form_pre', $tag ); |
22 | } elseif ( 'link_category' == $taxonomy ) { |
23 | do_action( 'edit_link_category_form_pre', $tag ); |
24 | } else { |
25 | do_action( 'edit_tag_form_pre', $tag ); |
26 | } |
27 | do_action( "{$taxonomy}_pre_edit_form", $tag, $taxonomy ); ?> |
28 |
|
29 | <div class="wrap"> |
30 | <h2><?php echo $tax->labels->edit_item; ?></h2> |