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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 |
|---|---|
| 57 | |
| 58 | get_current_screen()->set_help_sidebar( |
| 59 | '<p><strong>' . __('For more information:') . '</strong></p>' . |
| 60 | '<p>' . __('<a href="https://codex.wordpress.org/Network_Admin_Settings_Screen">Documentation on Network Settings</a>') . '</p>' . |
| 61 | '<p>' . __('<a href="https://wordpress.org/support/">Support Forums</a>') . '</p>' |
| 62 | ); |
| 63 | |
| 64 | if ( $_POST ) { |
| 65 | /** This action is documented in wp-admin/network/edit.php */ |
| 66 | do_action( 'wpmuadminedit' ); |
| 67 | |
| 68 | check_admin_referer( 'siteoptions' ); |
| 69 | |
| 70 | $checked_options = array( 'menu_items' => array(), 'registrationnotification' => 'no', 'upload_space_check_disabled' => 1, 'add_new_users' => 0 ); |
| 71 | foreach ( $checked_options as $option_name => $option_unchecked_value ) { |
| 72 | if ( ! isset( $_POST[$option_name] ) ) |
| 73 | $_POST[$option_name] = $option_unchecked_value; |
| 74 | } |
| 75 | |