A place to store some useful snippets of code for working with WordPress. Just a personal reference. All these codes have been tested by me and they work as intended, unless otherwise noted.<\/p>\n
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if ( ! function_exists( 'myfirsttheme_setup' ) ) :\n\/**\n * Sets up theme defaults and registers support for various WordPress features.\n *\n * Note that this function is hooked into the after_setup_theme hook, which runs\n * before the init hook. The init hook is too late for some features, such as indicating\n * support post thumbnails.\n *\/\nfunction myfirsttheme_setup() {\n \n \/**\n * Make theme available for translation.\n * Translations can be placed in the \/languages\/ directory.\n *\/\n load_theme_textdomain( 'myfirsttheme', get_template_directory() . '\/languages' );\n \n \/**\n * Add default posts and comments RSS feed links to <head>.\n *\/\n add_theme_support( 'automatic-feed-links' );\n \n \/**\n * Enable support for post thumbnails and featured images.\n *\/\n add_theme_support( 'post-thumbnails' );\n \n \/**\n * Add support for two custom navigation menus.\n *\/\n register_nav_menus( array(\n 'primary' => __( 'Primary Menu', 'myfirsttheme' ),\n 'secondary' => __('Secondary Menu', 'myfirsttheme' )\n ) );\n \n \/**\n * Enable support for the following post formats:\n * aside, gallery, quote, image, and video\n *\/\n add_theme_support( 'post-formats', array ( 'aside', 'gallery', 'quote', 'image', 'video' ) );\n}\nendif; \/\/ myfirsttheme_setup\nadd_action( 'after_setup_theme', 'myfirsttheme_setup' );<\/pre>\n\/**\n * MyFirstTheme's functions and definitions\n *\n * @package MyFirstTheme\n * @since MyFirstTheme 1.0\n *\/\n \n\/**\n * First, let's set the maximum content width based on the theme's design and stylesheet.\n * This will limit the width of all uploaded images and embeds.\n *\/\nif ( ! isset( $content_width ) )\n $content_width = 800; \/* pixels *\/\n \nif ( ! function_exists( 'myfirsttheme_setup' ) ) :\n\/**\n * Sets up theme defaults and registers support for various WordPress features.\n *\n * Note that this function is hooked into the after_setup_theme hook, which runs\n * before the init hook. The init hook is too late for some features, such as indicating\n * support post thumbnails.\n *\/\nfunction myfirsttheme_setup() {\n \n \/**\n * Make theme available for translation.\n * Translations can be placed in the \/languages\/ directory.\n *\/\n load_theme_textdomain( 'myfirsttheme', get_template_directory() . '\/languages' );\n \n \/**\n * Add default posts and comments RSS feed links to <head>.\n *\/\n add_theme_support( 'automatic-feed-links' );\n \n \/**\n * Enable support for post thumbnails and featured images.\n *\/\n add_theme_support( 'post-thumbnails' );\n \n \/**\n * Add support for two custom navigation menus.\n *\/\n register_nav_menus( array(\n 'primary' => __( 'Primary Menu', 'myfirsttheme' ),\n 'secondary' => __('Secondary Menu', 'myfirsttheme' )\n ) );\n \n \/**\n * Enable support for the following post formats:\n * aside, gallery, quote, image, and video\n *\/\n add_theme_support( 'post-formats', array ( 'aside', 'gallery', 'quote', 'image', 'video' ) );\n}\nendif; \/\/ myfirsttheme_setup\nadd_action( 'after_setup_theme', 'myfirsttheme_setup' );\n\n<\/pre>\nLoop through a query twice with rewind_loop.<\/p>\n
\/\/ Start the main loop\n<?php\n if ( have_posts() ) : while ( have_posts() ) : the_post();\n the_title();\n endwhile;\n endif;\n \n \/\/ Use rewind_posts() to use the query a second time.\n rewind_posts();\n \n \/\/ Start a new loop\n while ( have_posts() ) : the_post();\n the_content();\n endwhile;\n?><\/pre>\ndisplaying a single post with a list of posts from the same category below the single post.<\/p>\n
<?php\n \/\/ The main query.\n if ( have_posts() ) : while ( have_posts() ) : the_post();\n the_title(); \n the_content(); \n endwhile; \n else : \n \/\/ When no posts are found, output this text. \n _e( 'Sorry, no posts matched your criteria.' ); \n endif; \n wp_reset_postdata(); \n \n \/* \n * The secondary query. Note that you can use any category name here. In our example,\n * we use \"example-category\". \n *\/ \n $secondary_query = new WP_Query( 'category_name=example-category' ); \n \n \/\/ The second loop. if ( $secondary_query->have_posts() ) \n echo '<ul>';\n while ( $secondary_query->have_posts() ) :\n $secondary_query->the_post();\n echo '<li>' . get_the_title() . '<\/li>';\n endwhile;\n echo '<\/ul>';\n endif;\nwp_reset_postdata();\n?><\/pre>\nfunction wpb_rand_posts() { \n \n$args = array(\n 'post_type' => 'post',\n 'orderby' => 'rand',\n 'posts_per_page' => 5, \n );\n \n$the_query = new WP_Query( $args );\n \nif ( $the_query->have_posts() ) {\n \n$string .= '<ul>';\n while ( $the_query->have_posts() ) {\n $the_query->the_post();\n $string .= '<li><a href=\"'. get_permalink() .'\">'. get_the_title() .'<\/a><\/li>';\n }\n $string .= '<\/ul>';\n \/* Restore original Post Data *\/\n wp_reset_postdata();\n} else {\n \n$string .= 'no posts found';\n}\n \nreturn $string; \n} \n \nadd_shortcode('wpb-random-posts','wpb_rand_posts');\nadd_filter('widget_text', 'do_shortcode');<\/pre>\nNow you can display random posts inside a WordPress post, page, or text widget using the shortcode [wpb-random-posts].<\/p>\n
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Custom Taxonomies<\/h3>\n\/\/hook into the init action and call create_book_taxonomies when it fires\nadd_action( 'init', 'create_topics_hierarchical_taxonomy', 0 );\n \n\/\/create a custom taxonomy name it topics for your posts\n \nfunction create_topics_hierarchical_taxonomy() {\n \n\/\/ Add new taxonomy, make it hierarchical like categories\n\/\/first do the translations part for GUI\n \n $labels = array(\n 'name' => _x( 'Topics', 'taxonomy general name' ),\n 'singular_name' => _x( 'Topic', 'taxonomy singular name' ),\n 'search_items' => __( 'Search Topics' ),\n 'all_items' => __( 'All Topics' ),\n 'parent_item' => __( 'Parent Topic' ),\n 'parent_item_colon' => __( 'Parent Topic:' ),\n 'edit_item' => __( 'Edit Topic' ), \n 'update_item' => __( 'Update Topic' ),\n 'add_new_item' => __( 'Add New Topic' ),\n 'new_item_name' => __( 'New Topic Name' ),\n 'menu_name' => __( 'Topics' ),\n ); \n \n\/\/ Now register the taxonomy\n \n register_taxonomy('topics',array('post'), array(\n 'hierarchical' => true,\n 'labels' => $labels,\n 'show_ui' => true,\n 'show_admin_column' => true,\n 'query_var' => true,\n 'rewrite' => array( 'slug' => 'topic' ),\n ));\n \n}<\/pre>\n
\n\/\/hook into the init action and call create_topics_nonhierarchical_taxonomy when it fires\n \nadd_action( 'init', 'create_topics_nonhierarchical_taxonomy', 0 );\n \nfunction create_topics_nonhierarchical_taxonomy() {\n \n\/\/ Labels part for the GUI\n \n $labels = array(\n 'name' => _x( 'Topics', 'taxonomy general name' ),\n 'singular_name' => _x( 'Topic', 'taxonomy singular name' ),\n 'search_items' => __( 'Search Topics' ),\n 'popular_items' => __( 'Popular Topics' ),\n 'all_items' => __( 'All Topics' ),\n 'parent_item' => null,\n 'parent_item_colon' => null,\n 'edit_item' => __( 'Edit Topic' ), \n 'update_item' => __( 'Update Topic' ),\n 'add_new_item' => __( 'Add New Topic' ),\n 'new_item_name' => __( 'New Topic Name' ),\n 'separate_items_with_commas' => __( 'Separate topics with commas' ),\n 'add_or_remove_items' => __( 'Add or remove topics' ),\n 'choose_from_most_used' => __( 'Choose from the most used topics' ),\n 'menu_name' => __( 'Topics' ),\n ); \n \n\/\/ Now register the non-hierarchical taxonomy like tag\n \n register_taxonomy('topics','post',array(\n 'hierarchical' => false,\n 'labels' => $labels,\n 'show_ui' => true,\n 'show_admin_column' => true,\n 'update_count_callback' => '_update_post_term_count',\n 'query_var' => true,\n 'rewrite' => array( 'slug' => 'topic' ),\n ));\n}<\/pre>\nDisplay Custom Taxonomy<\/p>\n
\t\n<?php the_terms( $post->ID, 'topics', 'Topics: ', ', ', ' ' ); ?><\/pre>\n\u2260==========<\/p>\n
add_action( 'init', 'create_athlete_taxonomy' );\n\nfunction create_athlete_taxonomy() {\n\t$labels = array(\n\t\t'name' => 'Athletes',\n\t\t'singular_name' => 'Athlete',\n\t\t'search_items' => 'Search Athletes',\n\t\t'all_items' => 'All Athletes',\n\t\t'edit_item' => 'Edit Athlete',\n\t\t'update_item' => 'Update Athlete',\n\t\t'add_new_item' => 'Add New Athlete',\n\t\t'new_item_name' => 'New Athlete Name',\n\t\t'menu_name' => 'Athlete',\n\t\t'view_item' => 'View Athlete',\n\t\t'popular_items' => 'Popular Athlete',\n\t\t'separate_items_with_commas' => 'Separate athletes with commas',\n\t\t'add_or_remove_items' => 'Add or remove athletes',\n\t\t'choose_from_most_used' => 'Choose from the most used athletes',\n\t\t'not_found' => 'No athletes found'\n\t);\n\n\tregister_taxonomy(\n\t\t'athlete',\n\t\t'post',\n\t\tarray(\n\t\t\t'label' => __( 'Athlete' ),\n\t\t\t'hierarchical' => false,\n\t\t\t'labels' => $labels,\n\t\t\t'public' => true,\n\t\t\t'show_in_nav_menus' => false,\n\t\t\t'show_tagcloud' => false,\n\t\t\t'show_admin_column' => true,\n\t\t\t'rewrite' => array(\n\t\t\t\t'slug' => 'athletes'\n\t\t\t)\n\t\t)\n\t);\n}<\/pre>\nWidgets<\/h3>\n\/\/ Register and load the widget\nfunction wpb_load_widget() {\n register_widget( 'wpb_widget' );\n}\nadd_action( 'widgets_init', 'wpb_load_widget' );\n \n\/\/ Creating the widget \nclass wpb_widget extends WP_Widget {\n \nfunction __construct() {\nparent::__construct(\n \n\/\/ Base ID of your widget\n'wpb_widget', \n \n\/\/ Widget name will appear in UI\n__('WPBeginner Widget', 'wpb_widget_domain'), \n \n\/\/ Widget description\narray( 'description' => __( 'Sample widget based on WPBeginner Tutorial', 'wpb_widget_domain' ), ) \n);\n}\n \n\/\/ Creating widget front-end\n \npublic function widget( $args, $instance ) {\n$title = apply_filters( 'widget_title', $instance['title'] );\n \n\/\/ before and after widget arguments are defined by themes\necho $args['before_widget'];\nif ( ! empty( $title ) )\necho $args['before_title'] . $title . $args['after_title'];\n \n\/\/ This is where you run the code and display the output\necho __( 'Hello, World!', 'wpb_widget_domain' );\necho $args['after_widget'];\n}\n \n\/\/ Widget Backend \npublic function form( $instance ) {\nif ( isset( $instance[ 'title' ] ) ) {\n$title = $instance[ 'title' ];\n}\nelse {\n$title = __( 'New title', 'wpb_widget_domain' );\n}\n\/\/ Widget admin form\n?>\n<p>\n<label for=\"<?php echo $this->get_field_id( 'title' ); ?>\"><?php _e( 'Title:' ); ?><\/label> \n<input class=\"widefat\" id=\"<?php echo $this->get_field_id( 'title' ); ?>\" name=\"<?php echo $this->get_field_name( 'title' ); ?>\" type=\"text\" value=\"<?php echo esc_attr( $title ); ?>\" \/>\n<\/p>\n<?php \n}\n \n\/\/ Updating widget replacing old instances with new\npublic function update( $new_instance, $old_instance ) {\n$instance = array();\n$instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';\nreturn $instance;\n}\n} \/\/ Class wpb_widget ends here<\/pre>\n","protected":false},"excerpt":{"rendered":"A place to store some useful snippets of code for working with WordPress. Just a personal reference. All these codes have been tested by me and they work as intended, unless otherwise noted.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[19],"tags":[],"class_list":["post-644","post","type-post","status-publish","format-standard","hentry","category-wordpress"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/posts\/644","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/comments?post=644"}],"version-history":[{"count":1,"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/posts\/644\/revisions"}],"predecessor-version":[{"id":1237,"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/posts\/644\/revisions\/1237"}],"wp:attachment":[{"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/media?parent=644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/categories?post=644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/frowningbear.com\/codebase\/wp-json\/wp\/v2\/tags?post=644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}