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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 |
|---|---|
| 60 | |
| 61 | get_current_screen()->set_help_sidebar( |
| 62 | '<p><strong>' . __( 'For more information:' ) . '</strong></p>' . |
| 63 | '<p>' . __( '<a href="https://codex.wordpress.org/Network_Admin_Settings_Screen">Documentation on Network Settings</a>' ) . '</p>' . |
| 64 | '<p>' . __( '<a href="https://wordpress.org/support/">Support Forums</a>' ) . '</p>' |
| 65 | ); |
| 66 | |
| 67 | if ( $_POST ) { |
| 68 | /** This action is documented in wp-admin/network/edit.php */ |
| 69 | do_action( 'wpmuadminedit' ); |
| 70 | |
| 71 | check_admin_referer( 'siteoptions' ); |
| 72 | |
| 73 | $checked_options = array( |
| 74 | 'menu_items' => array(), |
| 75 | 'registrationnotification' => 'no', |
| 76 | 'upload_space_check_disabled' => 1, |
| 77 | 'add_new_users' => 0, |
| 78 | ); |