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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 |
|---|---|
| 28 | require_once ABSPATH . 'wp-admin/includes/meta-boxes.php'; |
| 29 | |
| 30 | add_meta_box( 'linksubmitdiv', __( 'Save' ), 'link_submit_meta_box', null, 'side', 'core' ); |
| 31 | add_meta_box( 'linkcategorydiv', __( 'Categories' ), 'link_categories_meta_box', null, 'normal', 'core' ); |
| 32 | add_meta_box( 'linktargetdiv', __( 'Target' ), 'link_target_meta_box', null, 'normal', 'core' ); |
| 33 | add_meta_box( 'linkxfndiv', __( 'Link Relationship (XFN)' ), 'link_xfn_meta_box', null, 'normal', 'core' ); |
| 34 | add_meta_box( 'linkadvanceddiv', __( 'Advanced' ), 'link_advanced_meta_box', null, 'normal', 'core' ); |
| 35 | |
| 36 | /** This action is documented in wp-admin/includes/meta-boxes.php */ |
| 37 | do_action( 'add_meta_boxes', 'link', $link ); |
| 38 | |
| 39 | /** |
| 40 | * Fires when link-specific meta boxes are added. |
| 41 | * |
| 42 | * @since 3.0.0 |
| 43 | * |
| 44 | * @param object $link Link object. |
| 45 | */ |
| 46 | do_action( 'add_meta_boxes_link', $link ); |