' . __( 'Uncheck this if you want the selected page to be accessible.', '404page' ) . '
';
if ( function_exists( 'wpsupercache_activate' ) ) {
echo '
' . __( 'WP Super Cache Plugin detected', '404page' ) . '. ' . __ ( 'If the page you selected as 404 error page is in cache, always a HTTP code 200 is sent. To avoid this and send a HTTP code 404 you have to exlcude this page from caching', '404page' ) . ' (' . __( 'Click here', '404page' ) . '). (' . __( 'Read more', '404page' ) . ')
' . __( 'Standard Mode uses the WordPress Template System and should work in most cases. If the 404page plugin does not work properly, probably you are using a theme or plugin that modifies the WordPress Template System. In this case the Compatibility Mode maybe can fix the problem, although it cannot be guaranteed that every possible configuration can be handled by Compatibility Mode. Standard Mode is the recommended method, only switch to Compatibility Mode if you have any problems.', '404page' ) . '
';
}
}
// this function hides the selected page from the list of pages
function exclude_404page( $query ) {
global $pagenow;
if( 'edit.php' == $pagenow && ( get_query_var( 'post_type' ) && 'page' == get_query_var( 'post_type' ) ) && !current_user_can( 'create_users' ) ) {
$query->set( 'post__not_in', array( $this->settings['404page_page_id'] ) );
}
return $query;
}
// adds the options page to admin menu
function admin_menu() {
$page_handle = add_theme_page ( __( '404 Error Page', "404page" ), __( '404 Error Page', '404page' ), 'manage_options', '404pagesettings', array( $this, 'admin_page' ) );
add_action( 'admin_print_scripts', array( $this, 'admin_js' ) );
}
// adds javascript to the 404page settings page
function admin_js() {
wp_enqueue_script( '404pagejs', plugins_url( '/404page.js', __FILE__ ), 'jquery', $this->version, true );
}
// creates the options page
function admin_page() {
if ( !current_user_can( 'manage_options' ) ) {
wp_die( __( 'You do not have sufficient permissions to access this page.' ) );
}
?>
404page Plugin: ';
if ( defined( 'CUSTOMIZR_VER' ) ) {
// Customizr Theme
_e( 'Customizr Theme detected. The 404page Plugin works in Customizr Compatibility Mode.', '404page' );
} elseif ( defined( 'ICL_SITEPRESS_VERSION' ) ) {
// WPML
_e( 'WPML Plugin detected. Operating Method is set to Compatibility Mode automatically to make the 404page Plugin work with WPML.', '404page' );
} elseif ( defined( 'POLYLANG_VERSION' ) ) {
// Polylang
_e( 'Polylang Plugin detected. Operating Method is set to Compatibility Mode automatically to make the 404page Plugin work with Polylang.', '404page' );
} elseif ( defined( 'SITEORIGIN_PANELS_VERSION' ) ) {
// Page Builder by SiteOrigin
_e( 'Page Builder by SiteOrigin Plugin detected. Operating Method is set to Compatibility Mode automatically to make the 404page Plugin work with Page Builder by SiteOrigin.', '404page' );
} elseif ( class_exists( 'bbPress' ) ) {
// bbPress
_e( 'bbPress Plugin detected. Operating Method is set to Compatibility Mode automatically to make the 404page Plugin work with bbPress.', '404page' );
} elseif ( function_exists( 'wpsupercache_activate' ) ) {
// WP Super Cache
_e( 'WP Super Cache Plugin detected. Please check Settings!', '404page' );
} else {
_e( 'Please check Operating Method.', '404page' );
}
echo ' ' . __( 'Settings', '404page' ) . '';
echo '
';
}
}
// dismiss the notice (AJAX)
function dismiss_admin_notice() {
update_option( '404page_notice_dismissed', 'DISMISSED' );
}
// Reset dismiss state for notice on plugin activation
function init_admin_notice( $network_wide ) {
global $wpdb;
if ( is_multisite() && $network_wide ) {
$current_blog = $wpdb->blogid;
$blog_ids = $wpdb->get_col( "SELECT blog_id FROM $wpdb->blogs" );
foreach ( $blog_ids as $blog_id ) {
switch_to_blog( $blog_id );
delete_option( '404page_notice_dismissed' );
}
switch_to_blog( $current_blog );
} else {
delete_option( '404page_notice_dismissed' );
}
}
// returns the id of the 404 page if one is defined, returns 0 if none is defined, returns -1 if the defined page id does not exist
private function get_404page_id() {
$pageid = get_option( '404page_page_id', 0 );
if ( $pageid != 0 ) {
$page = get_post( $pageid );
if ( !$page || $page->post_status != 'publish' ) {
$pageid = -1;
}
}
return $pageid;
}
// returns the selected method
private function get_404page_method() {
if ( defined( 'ICL_SITEPRESS_VERSION' ) || defined( 'POLYLANG_VERSION' ) || defined( 'SITEORIGIN_PANELS_VERSION' ) || class_exists( 'bbPress' ) ) {
// WPML or bbPress is active
return 'CMP';
} else {
return get_option( '404page_method', 'STD' );
}
}
// should we hide the selected 404 page from the page list?
private function get_404page_hide() {
return (bool)get_option( '404page_hide', false );
}
// should we fire an 404 error if the selected page is accessed directly?
private function get_404page_fire_error() {
return (bool)get_option( '404page_fire_error', true );
}
// make plugin expandable
function do_404page_action() {
do_action( '404page_after_404' );
}
// show meta boxes
function show_meta_boxes() {
?>
' . __( 'Settings', '404page' ) . '') );
}
// uninstall plugin
function uninstall() {
if( is_multisite() ) {
$this->uninstall_network();
} else {
$this->uninstall_single();
}
}
// uninstall network wide
function uninstall_network() {
global $wpdb;
$activeblog = $wpdb->blogid;
$blogids = $wpdb->get_col( esc_sql( 'SELECT blog_id FROM ' . $wpdb->blogs ) );
foreach ($blogids as $blogid) {
switch_to_blog( $blogid );
$this->uninstall_single();
}
switch_to_blog( $activeblog );
}
// uninstall single blog
function uninstall_single() {
foreach ( $this->settings as $key => $value) {
delete_option( $key );
}
}
}
$smart404page = new Smart404Page();
?>