list of some daily uses WordPress hooks with example
-
wp_head Action Hook:
- Description: Used to inject code into the <head> section of the HTML document.
- Example:
function custom_code_in_head() { echo '<meta name="description" content="Custom description">'; } add_action('wp_head', 'custom_code_in_head');
-
wp_footer Action Hook:
- Description: Allows insertion of code just before the closing </body> tag.
- Example:
function custom_code_in_footer(){ echo '<script>alert("Hello, World!");</script>'; }add_action('wp_footer', 'custom_code_in_footer');
-
init Action Hook:
- Description: Used for initializing code or actions.
- Example:
function custom_init_function() { // Your initialization code here } add_action('init', 'custom_init_function');
2. Filter Hooks:
the_content Filter Hook:
-
- Description: Allows modification of the content before it is displayed.
- Example:
function custom_content_filter($content) { return $content . '<p>Custom content added.</p>'; }add_filter('the_content', 'custom_content_filter');
-
the_title Filter Hook:
- Description: Used to modify the post/page title before it is displayed.
- Example:
function custom_title_filter($title){ return 'Custom Prefix: ' . $title; }add_filter('the_title', 'custom_title_filter');
-
excerpt_length Filter Hook:
- Description: Adjusts the length of the excerpt.
- Example:
function custom_excerpt_length($length){ return 20; // Set the desired length }add_filter('excerpt_length', 'custom_excerpt_length');
admin_menu Action Hook:
- Description: Used to add menu items to the WordPress admin menu.
- Example:
function add_custom_menu(){ add_menu_page('Custom Page', 'Custom Menu', 'manage_options', 'custom-page', 'custom_page_callback'); }add_action('admin_menu', 'add_custom_menu'); function custom_page_callback() { // Content for the custom admin page }widgets_init Action Hook:
- Description: Enables the registration of custom widgets.
- Example:
function register_custom_widget() { register_widget('Custom_Widget_Class'); }add_action('widgets_init', 'register_custom_widget'); class Custom_Widget_Class extends WP_Widget{ // Custom widget implementation }
the_excerpt Filter Hook:
- Description: Modifies the excerpt content before it is displayed.
- Example:
function custom_excerpt_filter($excerpt){return $excerpt . ' <a href="' . get_permalink() . '">Read more</a>';}add_filter('the_excerpt', 'custom_excerpt_filter');
login_headerurl Filter Hook:Description: Modifies the login page header URL.Example:function custom_login_url() {return home_url('/');}add_filter('login_headerurl', 'custom_login_url');
wp_nav_menu_itemsFilter Hook:Description: Adds custom items to the navigation menu.Example:function add_custom_menu_item($items, $args) {if ($args->theme_location == 'primary') {$items .= '<li><a href="#">Custom Link</a></li>';}return $items;}add_filter('wp_nav_menu_items', 'add_custom_menu_item', 10, 2);-
save_post Action Hook:Description: Triggered after a post or page is saved in the database.Example:function custom_save_post_callback($post_id, $post, $update) {// Custom logic to be executed after post/page is saved}add_action('save_post', 'custom_save_post_callback', 10, 3);
wp_enqueue_scripts Action Hook:Description: Used to enqueue scripts and styles on the front end.Example:function enqueue_custom_scripts() {wp_enqueue_script('custom-script', get_template_directory_uri() . '/js/custom-script.js', array('jquery'), '1.0', true);}add_action('wp_enqueue_scripts', 'enqueue_custom_scripts');-
the_title Filter Hook:Description: Modifies the post or page title before it is displayed.Example:function custom_title_filter($title) {return 'Custom Prefix: ' . $title;}add_filter('the_title', 'custom_title_filter');
excerpt_length Filter Hook:Description: Modifies the number of words in the excerpt.Example:function custom_excerpt_length($length){ return 20; // Set the custom excerpt length }add_filter('excerpt_length', 'custom_excerpt_length');
body_class Filter Hook:Description: Adds custom classes to the body element.Example:function add_custom_body_class($classes) {$classes[] = 'custom-class';return $classes;}add_filter('body_class', 'add_custom_body_class');
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