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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 |
---|---|
38 |
|
39 | if ( empty($header_callback) ) |
40 | $header_callback = '_admin_bar_bump_cb'; |
41 |
|
42 | add_action('wp_head', $header_callback); |
43 |
|
44 | wp_enqueue_script( 'admin-bar' ); |
45 | wp_enqueue_style( 'admin-bar' ); |
46 |
|
47 | do_action( 'admin_bar_init' ); |
48 | } |
49 |
|
50 | function add_menu( $args = array() ) { |
51 | $defaults = array( |
52 | 'title' => false, |
53 | 'href' => false, |
54 | 'parent' => false, // false for a root menu, pass the ID value for a submenu of that menu. |
55 | 'id' => false, // defaults to a sanitized title value. |
56 | 'meta' => false // array of any of the following options: array( 'html' => '', 'class' => '', 'onclick' => '', target => '', title => '' ); |