Not really, but you can define your own. All meta boxes are stored in the global variable $wp_meta_boxes which is a multi-dimensional array. function get_meta_boxes( $screen = null, $context=”advanced” ) { global $wp_meta_boxes; if ( empty( $screen ) ) $screen = get_current_screen(); elseif ( is_string( $screen ) ) $screen = convert_to_screen( $screen ); $page = … Read more
Have a look at: The Complete Guide To The WordPress Settings API (Part 8: Validation, Sanitisation, and Input II): add_settings_field( ‘Checkbox Element’, ‘Checkbox Element’, ‘sandbox_checkbox_element_callback’, ‘sandbox_theme_input_examples’, ‘input_examples_section’ ); function sandbox_checkbox_element_callback() { $options = get_option( ‘sandbox_theme_input_examples’ ); $html=”<input type=”checkbox” id=”checkbox_example” name=”sandbox_theme_input_examples[checkbox_example]” value=”1″” . checked( 1, $options[‘checkbox_example’], false ) . ‘/>’; $html .= ‘<label for=”checkbox_example”>This is an … Read more
To accomplish user activation process you need to do following steps: after create new user add a custom user field which indicates that this user has to activate his account send an email with activation code, provide a link in this email to a page where user will be activated implement activation page when user … Read more
You’re on the right track. I test the fields in the save_post callback, and then use admin notices to display errors to the user when a field fails validation. They show up just in a highlighted box at the top of the page, just like any errors/messages that WordPress itself generates. Here’s a simple example … Read more
The answer is — you can’t because WordPress can’t. There is no dependency management concept in WP and it was the same case before Composer had even existed. The rise of autoload (Composer or otherwise) slightly helps with it, since you might just be getting different copy loaded (hopefully close enough) rather than outright fatal … Read more
Just pass an array when updating your option. It will be serialized automatically.
Set the parent_slug property to null, example; add_submenu_page( null // -> Set to null – will hide menu link , ‘Page Title’ // -> Page Title , ‘Menu Title’ // -> Title that would otherwise appear in the menu , ‘administrator’ // -> Capability level , ‘menu_handle’ // -> Still accessible via admin.php?page=menu_handle , ‘page_callback’ … Read more
get_posts passes the heavy lifting off to WP_Query and if you look at the source of that class you can see that there are only a limited number of options with that fields argument. There are only three options in that switch— ids, id=>parent, and the default case, everything. You can use the posts_fields filter … Read more
The answers here are overthought and too complex. Why deactivating the plugin instead of preventing activation? Something as simple as calling die(‘your error message here) upon activation will do the job. function activate($networkwide) { if (is_multisite() && $networkwide) die(‘This plugin can\’t be activated networkwide’); } register_activation_hook(‘your-plugin/index.php’,’activate’); Then when you try to activate in the panel, … Read more
admin_url() gets you the correct administration page URL (and network_admin_url() to get a network administration page URL) Optionally, you can use add_query_arg() to append arguments to an URL, using an associative array: $page=”edit_record_page”; $rec_id = 1; $record_url = add_query_arg(compact(‘page’, ‘rec_id’), admin_url(‘admin.php’));