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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 |
---|---|
32 | /* Instantiate the admin bar */ |
33 |
|
34 | /** |
35 | * Filters the admin bar class to instantiate. |
36 | * |
37 | * @since 3.1.0 |
38 | * |
39 | * @param string $wp_admin_bar_class Admin bar class to use. Default 'WP_Admin_Bar'. |
40 | */ |
41 | $admin_bar_class = apply_filters( 'wp_admin_bar_class', 'WP_Admin_Bar' ); |
42 | if ( class_exists( $admin_bar_class ) ) |
43 | $wp_admin_bar = new $admin_bar_class; |
44 | else |
45 | return false; |
46 |
|
47 | $wp_admin_bar->initialize(); |
48 | $wp_admin_bar->add_menus(); |
49 |
|
50 | return true; |