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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 |
|---|---|
| 24 | |
| 25 | require_once('./includes/meta-boxes.php'); |
| 26 | |
| 27 | add_meta_box('linksubmitdiv', __('Save'), 'link_submit_meta_box', 'link', 'side', 'core'); |
| 28 | add_meta_box('linkcategorydiv', __('Categories'), 'link_categories_meta_box', 'link', 'normal', 'core'); |
| 29 | add_meta_box('linktargetdiv', __('Target'), 'link_target_meta_box', 'link', 'normal', 'core'); |
| 30 | add_meta_box('linkxfndiv', __('Link Relationship (XFN)'), 'link_xfn_meta_box', 'link', 'normal', 'core'); |
| 31 | add_meta_box('linkadvanceddiv', __('Advanced'), 'link_advanced_meta_box', 'link', 'normal', 'core'); |
| 32 | |
| 33 | do_action('add_meta_boxes', 'link', $link); |
| 34 | do_action('add_meta_boxes_link', $link); |
| 35 | |
| 36 | do_action('do_meta_boxes', 'link', 'normal', $link); |
| 37 | do_action('do_meta_boxes', 'link', 'advanced', $link); |
| 38 | do_action('do_meta_boxes', 'link', 'side', $link); |
| 39 | |
| 40 | add_contextual_help($current_screen, |
| 41 | '<p>' . __( 'You can add or edit links on this screen by entering information in each of the boxes. Only the link’s web address and name (the text you want to display on your site as the link) are required fields.' ) . '</p>' . |
| 42 | '<p>' . __( 'The boxes for link name, web address, and description have fixed positions, while the others may be repositioned using drag and drop. You can also hide boxes you don’t use in the Screen Options tab, or minimize boxes by clicking on the title bar of the box.' ) . '</p>' . |