Create Add action
/**
* Create Add_action
*/
add_action( $hook, $function_to_add, $priority, $accepted_args );
Create Add_action_google_font
/**
* Create Add_action_google_font
*/
function add_google_font() {
wp_enqueue_style( 'google_font', 'http://fonts.googleapis.com/css?family=Pacifico' );
}
add_action( 'wp_enqueue_scripts', 'add_google_font' );
Create Add Filter
/**
* Create Add_filter
*/
add_filter( $tag, $function_to_add, $priority, $accepted_args );
Create Add_admin_menu
/**
* Create Add_admin_menu
*/
add_action( 'admin_menu' , 'my_plugin_page' );
function my_plugin_page() {
add_options_page( 'My Page', 'My Page', 'manage_options', 'my_plugin', 'my_plugin_page' );
}
add_action( 'admin_menu', 'register_my_custom_menu_page' );
function register_my_custom_menu_page() {
add_menu_page( 'custom menu title', 'custom menu', 'manage_options', 'myplugin/myplugin-admin.php', '', 'dashicons-admin-site', 6 );
}
Create Add_apply_filters
/**
* Create Add_apply_filters
*/
// First create a function and hook it into new example hook
function example_callback( $string ) {
$new_value = $string . " NEW!";
return $new_value;
}
add_filter( 'example_filter', 'example_callback' );
// Then use apply_filters in your code when you want the filter to run
echo $value = apply_filters( 'example_filter', 'Default value' );
// From http://wpseek.com/function/apply_filters/
Create Add_body_class
/**
* Create Add_body_class
*/
function custom_body_classes( $classes ) {
if ( 'post' == get_post_type() ) {
$classes[] = "custom-class";
}
return $classes;
}
add_filter( 'body_class', 'custom_body_classes' );
Create Add_init
/**
* Create Add_body_class
*/
function my_init_function() {
echo current_filter(); // 'init'
}
add_action( 'init', 'my_init_function' );
Create Add_do_action
/**
* Create Add_do_action
*/
do_action( $tag, $arg );
do_action( $tag, $arg_a, $arg_b, $etc );
do_action_ref_array( $tag, $args );
Create Add_do_action_hooks
/**
* Create Add_do_action_hooks
*/
function custom_footer() {
do_action('my_footer');
}
function custom_footer_text() {
echo "Custom footer text";
}
add_action( 'my_footer', 'custom_footer_text' );
Define Your Own WordPress Action Hooks
Create add_filter_excerpt_length
/**
* Create add_filter_excerpt_length
*/
add_filter( 'excerpt_length', 'excerpt_length_example' );
function excerpt_length_example( $words ) {
return 15;
}
Create has_action
/**
* Create has_action
*/
if ( has_action( 'init', 'custom_plugin_code' ) ) {
remove_action( 'init', 'custom_plugin_code' );
add_action( 'init', 'my_content_code' );
}
Create has_filter
/**
* Create has_filter
*/
if ( has_filter( 'custom_plugin_filter' ) ) {
add_filter( 'custom_plugin_filter', 'my_custom_code' );
}
if ( has_filter( 'the_content', 'custom_plugin_function' ) ) {
remove_filter( 'the_content', 'custom_plugin_function' );
add_filter( 'the_content', 'my_content_code' );
}
Create hook_debugging_functions
/**
* Create has_filter
*/
function list_hooks( $filter = false ){
global $wp_filter;
$hooks = $wp_filter;
ksort( $hooks );
foreach( $hooks as $tag => $hook )
if ( false === $filter || false !== strpos( $tag, $filter ) )
dump_hook($tag, $hook);
}
function list_live_hooks( $hook = false ) {
if ( false === $hook )
$hook = 'all';
add_action( $hook, 'list_hook_details', -1 );
}
function list_hook_details( $input = NULL ) {
global $wp_filter;
$tag = current_filter();
if( isset( $wp_filter[$tag] ) )
dump_hook( $tag, $wp_filter[$tag] );
return $input;
}
function dump_hook( $tag, $hook ) {
ksort($hook);
echo "<pre>>>>>>\t<strong>$tag</strong><br />";
foreach( $hook as $priority => $functions ) {
echo $priority;
foreach( $functions as $function )
if( $function['function'] != 'list_hook_details' ) {
echo "\t";
if( is_string( $function['function'] ) )
echo $function['function'];
elseif( is_string( $function['function'][0] ) )
echo $function['function'][0] . ' -> ' . $function['function'][1];
elseif( is_object( $function['function'][0] ) )
echo "(object) " . get_class( $function['function'][0] ) . ' -> ' . $function['function'][1];
else
print_r($function);
echo ' (' . $function['accepted_args'] . ') <br />';
}
}
echo '</pre>';
}
Create add_filter_the_content
/**
* Create add_filter_the_content
*/
function only_run_in_main_loop( $content ) {
if ( is_main_query() ) {
}
}
add_filter( 'the_content', 'only_run_in_main_loop' );
Create list_hooked_functions
/**
* Create list_hooked_functions
*/
list_hooked_functions();
function list_hooked_functions($tag=false){
global $wp_filter;
if ($tag) {
$hook[$tag]=$wp_filter[$tag];
if (!is_array($hook[$tag])) {
trigger_error("Nothing found for '$tag' hook", E_USER_WARNING);
return;
}
}
else {
$hook=$wp_filter;
ksort($hook);
}
echo '<pre>';
foreach($hook as $tag => $priority){
echo "<br />>>>>>\t<strong>$tag</strong><br />";
ksort($priority);
foreach($priority as $priority => $function){
echo $priority;
foreach($function as $name => $properties) echo "\t$name<br />";
}
}
echo '</pre>';
return;
}
Create manage_posts_columns
/**
* Create manage_posts_columns
*/
function manage_posts_columns_example( $columns ) {
unset( $columns['author'] );
unset( $columns['categories'] );
unset( $columns['tags'] );
unset( $columns['comments'] );
return $columns;
}
add_filter( 'manage_posts_columns', 'manage_posts_columns_example' );
Create register_menu
/**
* Create register_menu
*/
function register_my_menus() {
register_nav_menus(
array(
'footer_menu' => __( 'Footer Menu', 'mytheme' )
)
);
}
add_action( 'init', 'register_my_menus' );
Create remove_action
/**
* Create remove_action
*/
remove_action( $tag, $function_to_remove, $priority );
Create remove_action
/**
* Create remove_action
*/
remove_action( 'wp_enqueue_scripts', 'add_google_font' );
Create add_filter_bulk_actions-edit-post
/**
* Create add_filter_bulk_actions-edit-post
*/
function my_custom_bulk_actions($actions){
var_export( $actions );
unset( $actions['delete'] );
return $actions;
}
add_filter('bulk_actions-edit-post','__return_empty_array');
Create remove_filter
/**
* Create remove_filter
*/
remove_filter( $tag, $function_to_remove, $priority );
Create widgets_init
/**
* Create widgets_init
*/
function create_my_widget() {
register_sidebar(array(
'name' => __( 'My Sidebar', 'mytheme' ),
'id' => 'my_sidebar',
'description' => __( 'The one and only', 'mytheme' ),
));
}
add_action( 'widgets_init', 'create_my_widget' );
Create wp_enqueue_scripts and wp_enqueue_style
/**
* Create wp_enqueue_scripts and wp_enqueue_style
*/
function theme_styles() {
wp_enqueue_style( 'bootstrap_css', get_template_directory_uri() . '/css/bootstrap.min.css' );
wp_enqueue_style( 'main_css', get_template_directory_uri() . '/style.css' );
}
add_action( 'wp_enqueue_scripts', 'theme_styles' );
function theme_js() {
wp_enqueue_script( 'bootstrap_js', get_template_directory_uri() . '/js/bootstrap.min.js', array('jquery'), '', true );
wp_enqueue_script( 'theme_js', get_template_directory_uri() . '/js/theme.js', array('jquery', 'bootstrap_js'), '', true );
}
add_action( 'wp_enqueue_scripts', 'theme_js' );
Create add_filter_login_redirect
/**
* Create add_filter_login_redirect
*/
add_filter( 'login_redirect', 'login_redirect_example', 10, 3 );
function login_redirect_example( $redirect_to, $request, $user ) {
global $user;
if ( isset( $user->roles ) && is_array( $user->roles ) ) {
if ( in_array( 'subscriber', $user->roles ) ) {
return home_url();
} else {
return $redirect_to;
}
}
return;
}
Create add_filter_wp_title
/**
* Create add_filter_wp_title
*/
function custom_wp_title( $title, $sep ) {
global $page;
// Add the site name.
$title .= get_bloginfo( 'name' );
// Add the site description for the home/front page.
$site_description = get_bloginfo( 'description', 'display' );
if ( $site_description && ( is_home() || is_front_page() ) ) {
$title = "$title $sep $site_description";
}
return $title;
}
add_filter( 'wp_title', 'custom_wp_title', 20, 2 );
Top comments (0)