Think of this pseudo code if sky == blue set a = 5 if grass == green set a = 7 What value will a have? Not 12. This is the exact same situation. You are setting a specific parameter to a specific value. In the second call, you are overwriting your previous value. To … Read more
A simple solution could be to check when you click the “empty all cache” Button with $_GET Like this: function wpse_16722_purge_varnish() { // Is the button submitted, Get the value $purge = isset( $_GET[‘w3tc_note’] ) ? trim( $_GET[‘w3tc_note’] ) : ”; // Security-check, user can edit settings // And the button “Empty all cache” is … Read more
One problem is that you’re hooking in too early. Reference the Hooks API Action Reference. Template conditionals such as is_page() are only available after the query has been set up and parsed. The earliest action that you can usually safely rely on query conditionals is pre_get_posts. You’re hooking into init, which fires much earlier: muplugins_loaded … Read more
The hook is described on this page in Action reference section.
TL;DR: No, you can use save_post. Unless you consider programmatic modification of only metadata “modifying a post”. There (theoretically) is a way of modifying a post without triggering the save_post action hook: Direct modification of the database. But for one no plugin or theme author in his right mind would go that route and for … Read more
Looking at the sources (core files, wp-includes/option.php) you can always find your target hook tags: add_action(‘added_option’, ‘wpse230212_callback_add’, 10, 2); add_action(‘updated_option’, ‘wpse230212_callback_update’, 10, 3); function wpse230212_callback_add( $option_name, $option_value ) { // do stuff on add_option } function wpse230212_callback_update( $option_name, $old_value, $option_value ) { // do stuff on update_option } Hope that helps.
You need to match the $priority you used to hook the action: remove_action( ‘save_post’, array( $this, ‘save_box’ ), 20 /* Same as add_action call */ ); http://codex.wordpress.org/Function_Reference/remove_action Make sure you take the $post_id argument in your save_box method too: function save_box( $post_id ) { … }
plugins_loaded fires once activated plugins have loaded. This fires on both admin and public screens. admin_init fires as an admin screen or script is being initialized. This fires only on admin screens. The typical order for firing of hooks on the admin screen is: muplugins_loaded – this is the first hook available to must-use plugins … Read more
Here is the simplest implementation I know of since there is no real API: //add the needed scripts and styles add_action(‘admin_enqueue_scripts’, ‘wpse_46028_enqueue_admin_scripts’); function wpse_46028_enqueue_admin_scripts() { wp_enqueue_style(‘wp-pointer’); wp_enqueue_script(‘wp-pointer’); //hook the pointer add_action(‘admin_print_footer_scripts’, ‘wpse_46028_print_footer_scripts’ ); } function wpse_46028_print_footer_scripts() { $pointer_content=”<h3>WordPress Answers</h3>”; $pointer_content .= ‘<p>This is your pointer content</p>’; ?> <script type=”text/javascript”> //<![CDATA[ jQuery(document).ready( function($) { //jQuery selector … Read more
You can use the allowed_block_types hook: <?php function wpse_allowed_block_types($allowed_block_types, $post) { // Limit blocks in ‘post’ post type if($post->post_type == ‘post’) { // Return an array containing the allowed block types return array( ‘core/paragraph’, ‘core/heading’ ); } // Limit blocks in ‘page’ post type elseif($post->post_type == ‘page’) { return array( ‘core/list’ ); } // Allow … Read more