A collection of cool WordPress functions.
- Remove WordPress version from header
- Disable built-in post type
- Disable WordPress emoji
- Remove comments
- Add CPT to your main WP RSS feed
- Add CPT count action to WordPress dashboard
- Create custom WordPress dashboard widget
- Add breadcrumbs to your theme
- Add numeric pagination to your theme
- Fix custom post type tags pagination
- Remove default image sizes
- Add CPT to category and tag archives
- Add the support for your CPT in the widget activity of the admin dashboard
- Remove all dashboard widgets
- Remove welcome panel in dashboard
- Let WordPress manage the document title
- Switch default core markup to output valid HTML5
- Modify admin footer text
- Modify excerpt length
- Change more excerpt
- Create WordPress settings page For custom options
- Create related posts function
- Add Bootstrap 3 navigation style to WordPress menu manager
/* ----------------------------------------------------------------------------
* Remove WordPress version from header
* ------------------------------------------------------------------------- */
function simple_remove_version_info() {
return '';
}
add_filter( 'the_generator', 'simple_remove_version_info' );Use this to remove Posts if your theme dont use it at all.
/* ----------------------------------------------------------------------------
* Disable built-in post type
* ------------------------------------------------------------------------- */
add_action( 'init', 'simple_remove_default_post_type', 1 );
function simple_remove_default_post_type() {
register_post_type( 'post', array(
'capability_type' => 'post',
'capabilities' => array(
'edit_post' => 'do_not_allow', // false < WP 4.5
'publish_posts' => 'do_not_allow', // false < WP 4.5
'create_posts' => 'do_not_allow', // false < WP 4.5
'edit_posts' => 'do_not_allow', // false < WP 4.5
),
'map_meta_cap' => false
) );
}/* ----------------------------------------------------------------------------
* Disable WordPress emoji
* ------------------------------------------------------------------------- */
function disable_wp_emojicons() {
remove_action( 'admin_print_styles', 'print_emoji_styles' );
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
remove_action( 'wp_print_styles', 'print_emoji_styles' );
remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );
add_filter( 'tiny_mce_plugins', 'disable_emojicons_tinymce' );
add_filter( 'emoji_svg_url', '__return_false' );
}
add_action( 'init', 'disable_wp_emojicons' );
function disable_emojicons_tinymce( $plugins ) {
if ( is_array( $plugins ) ) {
return array_diff( $plugins, array( 'wpemoji' ) );
} else {
return array();
}
}/* ----------------------------------------------------------------------------
* Remove comments
* ------------------------------------------------------------------------- */
// Removes from admin menu
add_action( 'admin_menu', 'my_remove_admin_menus' );
function my_remove_admin_menus() {
remove_menu_page( 'edit-comments.php' );
}
// Removes from post and pages
add_action( 'init', 'remove_comment_support', 100 );
function remove_comment_support() {
remove_post_type_support( 'post', 'comments' );
remove_post_type_support( 'page', 'comments' );
}
// Removes from admin bar
function mytheme_admin_bar_render() {
global $wp_admin_bar;
$wp_admin_bar->remove_menu( 'comments' );
}
add_action( 'wp_before_admin_bar_render', 'mytheme_admin_bar_render' );/* ----------------------------------------------------------------------------
* Add CPT to your main WordPress RSS feed
* ------------------------------------------------------------------------- */
function simple_feed_request( $rss ) {
if ( isset( $rss[ 'feed' ] ) && !isset( $rss['post_type'] ) ) {
// Return all post types
$rss['post_type'] = 'any';
// Return posts of post types of your choice like 'post' and 'news'
//$rss['post_type'] = array( 'post', 'news' );
}
return $rss;
}/* ----------------------------------------------------------------------------
* Add CPT count action to WordPress dashboard
* ------------------------------------------------------------------------- */
add_action( 'dashboard_glance_items', 'simple_glance_items' );
// Showing all custom posts count
function simple_glance_items() {
$glances = array();
$args = array(
'public' => true, // Showing public post types only
'_builtin' => false // Except the build-in wp post types (page, post, attachments)
);
// Getting your custom post types
$post_types = get_post_types( $args, 'object', 'and' );
foreach ( $post_types as $post_type ) {
// Counting each post
$num_posts = wp_count_posts( $post_type->name );
// Number format
$num = number_format_i18n( $num_posts->publish );
// Text format
$text = _n( $post_type->labels->singular_name, $post_type->labels->name, intval( $num_posts->publish ) );
// If use capable to edit the post type
if ( current_user_can( 'edit_posts' ) ) {
// Show with link
$glance = '<a class="'.$post_type->name.'-count" href="'.admin_url( 'edit.php?post_type='.$post_type->name ).'">'.$num.' '.$text.'</a>';
} else {
// Show without link
$glance = '<span class="'.$post_type->name.'-count">'.$num.' '.$text.'</span>';
}
// Save in array
$glances[] = $glance;
}
// return them
return $glances;
}/* ----------------------------------------------------------------------------
* Create custom WordPress dashboard widget
* ------------------------------------------------------------------------- */
function dashboard_widget_function() {
echo '
<h2>Custom Dashboard Widget</h2>
<p>Custom content here</p>
';
}
function add_dashboard_widgets() {
wp_add_dashboard_widget( 'custom_dashboard_widget', 'Custom Dashoard Widget', 'dashboard_widget_function' );
}
add_action( 'wp_dashboard_setup', 'add_dashboard_widgets' );/* ----------------------------------------------------------------------------
* Add breadcrumbs to your theme
* ------------------------------------------------------------------------- */
function simple_breadcrumbs() {
/* === OPTIONS === */
$text['home'] = 'Home'; // text for the 'Home' link
$text['category'] = 'Archive by Category "%s"'; // text for a category page
$text['search'] = 'Search Results for "%s" Query'; // text for a search results page
$text['tag'] = 'Posts Tagged "%s"'; // text for a tag page
$text['author'] = 'Articles Posted by %s'; // text for an author page
$text['404'] = 'Error 404'; // text for the 404 page
$show_current = 1; // 1 - show current post/page/category title in breadcrumbs, 0 - don't show
$show_on_home = 0; // 1 - show breadcrumbs on the homepage, 0 - don't show
$show_home_link = 1; // 1 - show the 'Home' link, 0 - don't show
$show_title = 1; // 1 - show the title for the links, 0 - don't show
$delimiter = ' > '; // delimiter between crumbs
$before = '<span class="current">'; // tag before the current crumb
$after = '</span>'; // tag after the current crumb
/* === END OF OPTIONS === */
global $post;
$home_link = home_url('/');
$link_before = '<span typeof="v:Breadcrumb">';
$link_after = '</span>';
$link_attr = ' rel="v:url" property="v:title"';
$link = $link_before . '<a' . $link_attr . ' href="%1$s">%2$s</a>' . $link_after;
$parent_id = $parent_id_2 = $post->post_parent;
$frontpage_id = get_option('page_on_front');
if (is_home() || is_front_page()) {
if ($show_on_home == 1) echo '<div class="breadcrumbs"><a href="' . $home_link . '">' . $text['home'] . '</a></div>';
} else {
echo '<div class="breadcrumbs" xmlns:v="http://rdf.data-vocabulary.org/#">';
if ($show_home_link == 1) {
echo '<a href="' . $home_link . '" rel="v:url" property="v:title">' . $text['home'] . '</a>';
if ($frontpage_id == 0 || $parent_id != $frontpage_id) echo $delimiter;
}
if ( is_category() ) {
$this_cat = get_category(get_query_var('cat'), false);
if ($this_cat->parent != 0) {
$cats = get_category_parents($this_cat->parent, TRUE, $delimiter);
if ($show_current == 0) $cats = preg_replace("#^(.+)$delimiter$#", "$1", $cats);
$cats = str_replace('<a', $link_before . '<a' . $link_attr, $cats);
$cats = str_replace('</a>', '</a>' . $link_after, $cats);
if ($show_title == 0) $cats = preg_replace('/ title="(.*?)"/', '', $cats);
echo $cats;
}
if ($show_current == 1) echo $before . sprintf($text['category'], single_cat_title('', false)) . $after;
} elseif ( is_search() ) {
echo $before . sprintf($text['search'], get_search_query()) . $after;
} elseif ( is_day() ) {
echo sprintf($link, get_year_link(get_the_time('Y')), get_the_time('Y')) . $delimiter;
echo sprintf($link, get_month_link(get_the_time('Y'),get_the_time('m')), get_the_time('F')) . $delimiter;
echo $before . get_the_time('d') . $after;
} elseif ( is_month() ) {
echo sprintf($link, get_year_link(get_the_time('Y')), get_the_time('Y')) . $delimiter;
echo $before . get_the_time('F') . $after;
} elseif ( is_year() ) {
echo $before . get_the_time('Y') . $after;
} elseif ( is_single() && !is_attachment() ) {
if ( get_post_type() != 'post' ) {
$post_type = get_post_type_object(get_post_type());
$slug = $post_type->rewrite;
printf($link, $home_link . $slug['slug'] . '/', $post_type->labels->name);
if ($show_current == 1) echo $delimiter . $before . get_the_title() . $after;
} else {
$cat = get_the_category(); $cat = $cat[0];
$cats = get_category_parents($cat, TRUE, $delimiter);
if ($show_current == 0) $cats = preg_replace("#^(.+)$delimiter$#", "$1", $cats);
$cats = str_replace('<a', $link_before . '<a' . $link_attr, $cats);
$cats = str_replace('</a>', '</a>' . $link_after, $cats);
if ($show_title == 0) $cats = preg_replace('/ title="(.*?)"/', '', $cats);
echo $cats;
if ($show_current == 1) echo $before . get_the_title() . $after;
}
} elseif ( !is_single() && !is_page() && get_post_type() != 'post' && !is_404() ) {
$post_type = get_post_type_object(get_post_type());
//echo $before . $post_type->labels->name . $after;
echo $before . post_type_archive_title() . $after;
} elseif ( is_attachment() ) {
$parent = get_post($parent_id);
$cat = get_the_category($parent->ID); $cat = $cat[0];
$cats = get_category_parents($cat, TRUE, $delimiter);
$cats = str_replace('<a', $link_before . '<a' . $link_attr, $cats);
$cats = str_replace('</a>', '</a>' . $link_after, $cats);
if ($show_title == 0) $cats = preg_replace('/ title="(.*?)"/', '', $cats);
echo $cats;
printf($link, get_permalink($parent), $parent->post_title);
if ($show_current == 1) echo $delimiter . $before . get_the_title() . $after;
} elseif ( is_page() && !$parent_id ) {
if ($show_current == 1) echo $before . get_the_title() . $after;
} elseif ( is_page() && $parent_id ) {
if ($parent_id != $frontpage_id) {
$breadcrumbs = array();
while ($parent_id) {
$page = get_page($parent_id);
if ($parent_id != $frontpage_id) {
$breadcrumbs[] = sprintf($link, get_permalink($page->ID), get_the_title($page->ID));
}
$parent_id = $page->post_parent;
}
$breadcrumbs = array_reverse($breadcrumbs);
for ($i = 0; $i < count($breadcrumbs); $i++) {
echo $breadcrumbs[$i];
if ($i != count($breadcrumbs)-1) echo $delimiter;
}
}
if ($show_current == 1) {
if ($show_home_link == 1 || ($parent_id_2 != 0 && $parent_id_2 != $frontpage_id)) echo $delimiter;
echo $before . get_the_title() . $after;
}
} elseif ( is_tag() ) {
echo $before . sprintf($text['tag'], single_tag_title('', false)) . $after;
} elseif ( is_author() ) {
global $author;
$userdata = get_userdata($author);
echo $before . sprintf($text['author'], $userdata->display_name) . $after;
} elseif ( is_404() ) {
echo $before . $text['404'] . $after;
}
if ( get_query_var('paged') ) {
if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() || is_archive() || is_page() ) echo ' (';
echo __('Page') . ' ' . get_query_var('paged');
if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() || is_archive() || is_page() ) echo ')';
}
echo '</div><!-- .breadcrumbs -->';
}
} // end simple_breadcrumbs()Insert this where you want it to appear in your template:
<?php if (function_exists('simple_breadcrumbs')) simple_breadcrumbs(); ?>/* ----------------------------------------------------------------------------
* Add numeric pagination to your theme
* ------------------------------------------------------------------------- */
function numeric_posts_nav() {
if( is_singular() )
return;
global $wp_query;
/** Stop execution if there's only 1 page */
if( $wp_query->max_num_pages <= 1 )
return;
$paged = get_query_var( 'paged' ) ? absint( get_query_var( 'paged' ) ) : 1;
$max = intval( $wp_query->max_num_pages );
/** Add current page to the array */
if ( $paged >= 1 )
$links[] = $paged;
/** Add the pages around the current page to the array */
if ( $paged >= 3 ) {
$links[] = $paged - 1;
$links[] = $paged - 2;
}
if ( ( $paged + 2 ) <= $max ) {
$links[] = $paged + 2;
$links[] = $paged + 1;
}
echo '<div class="navigation"><ul>' . "\n";
/** Previous Post Link */
if ( get_previous_posts_link() )
printf( '<li class="arrow">%s</li>' . "\n", get_previous_posts_link('<i class="my-left-arrow"></i>') );
/** Link to first page, plus ellipses if necessary */
if ( ! in_array( 1, $links ) ) {
$class = 1 == $paged ? ' class="active"' : '';
printf( '<li%s><a href="%s">%s</a></li>' . "\n", $class, esc_url( get_pagenum_link( 1 ) ), '1' );
if ( ! in_array( 2, $links ) )
echo '<li class="points">…</li>';
}
/** Link to current page, plus 2 pages in either direction if necessary */
sort( $links );
foreach ( (array) $links as $link ) {
$class = $paged == $link ? ' class="active"' : '';
printf( '<li%s><a href="%s">%s</a></li>' . "\n", $class, esc_url( get_pagenum_link( $link ) ), $link );
}
/** Link to last page, plus ellipses if necessary */
if ( ! in_array( $max, $links ) ) {
if ( ! in_array( $max - 1, $links ) )
echo '<li class="points">…</li>' . "\n";
$class = $paged == $max ? ' class="active"' : '';
printf( '<li%s><a href="%s">%s</a></li>' . "\n", $class, esc_url( get_pagenum_link( $max ) ), $max );
}
/** Next Post Link */
if ( get_next_posts_link() )
printf( '<li class="arrow"/>%s</li>' . "\n", get_next_posts_link('<i class="my-right-arrow"></i>') );
echo '</ul></div>' . "\n";
}Insert this where you want it to appear in your template:
<?php if ( function_exists( 'numeric_posts_nav' ) ) { numeric_posts_nav(); } ?>If you have cpt with tags and use numeric_posts_nav function add this to fix the pagination.
/* ----------------------------------------------------------------------------
* Fix custom post type tags pagination
* ------------------------------------------------------------------------- */
function tagfix_add_custom_types( $query ) {
if( is_tag() && $query->is_main_query() ) {
$query->set( 'post_type', 'any' );
}
}
add_filter( 'pre_get_posts', 'tagfix_add_custom_types' );/* ----------------------------------------------------------------------------
* Remove default image sizes
* ------------------------------------------------------------------------- */
function remove_default_image_sizes( $sizes ) {
/* Default WordPress */
unset( $sizes['thumbnail'] ); // Remove Thumbnail (150 x 150 hard cropped)
unset( $sizes['medium'] ); // Remove Medium resolution (300 x 300 max height 300px)
unset( $sizes['medium_large'] ); // Remove Medium Large (added in WP 4.4) resolution (768 x 0 infinite height)
unset( $sizes['large'] ); // Remove Large resolution (1024 x 1024 max height 1024px)
/* With WooCommerce */
unset( $sizes[ 'shop_thumbnail' ]); // Remove Shop thumbnail (180 x 180 hard cropped)
unset( $sizes[ 'shop_catalog' ]); // Remove Shop catalog (300 x 300 hard cropped)
unset( $sizes[ 'shop_single' ]); // Shop single (600 x 600 hard cropped)
return $sizes;
}
add_filter( 'intermediate_image_sizes_advanced', 'remove_default_image_sizes' );/* ----------------------------------------------------------------------------
* Add CPT to category and tag archives
* ------------------------------------------------------------------------- */
function simple_add_custom_types( $query ) {
if( is_category() || is_tag() && empty( $query->query_vars['suppress_filters'] ) ) {
$query->set( 'post_type', 'any' );
return $query;
}
}
add_filter( 'pre_get_posts', 'simple_add_custom_types');/* ----------------------------------------------------------------------------
* Add the support for your CPT in the widget activity of the admin dashboard
* ------------------------------------------------------------------------- */
if ( is_admin() ) {
add_filter( 'dashboard_recent_posts_query_args', 'add_page_to_dashboard_activity' );
function add_page_to_dashboard_activity( $query_args ) {
// Return all post types
$query_args['post_type'] = 'any';
// Or return post types of your choice
// query_args['post_type'] = array( 'post', 'foo', 'bar' );
if ( $query_args['post_status'] == 'publish' ) {
$query_args['posts_per_page'] = 5;
}
return $query_args;
}
}/* ----------------------------------------------------------------------------
* Remove all dashboard widgets
* ------------------------------------------------------------------------- */
function remove_dashboard_widgets() {
global $wp_meta_boxes;
unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press'] );
unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links'] );
unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now'] );
unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins'] );
unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_drafts'] );
unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments'] );
unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_primary'] );
unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary'] );
remove_meta_box( 'dashboard_activity', 'dashboard', 'normal' );
}
add_action( 'wp_dashboard_setup', 'remove_dashboard_widgets' );/* ----------------------------------------------------------------------------
* Remove welcome panel in dashboard
* ------------------------------------------------------------------------- */
remove_action('welcome_panel', 'wp_welcome_panel');Add the following to functions.php and remove the <title> tag from your header.
/* ----------------------------------------------------------------------------
* Let WordPress manage the document title
* ------------------------------------------------------------------------- */
add_theme_support( 'title-tag' );/* ----------------------------------------------------------------------------
* Switch default core markup to output valid HTML5
* ------------------------------------------------------------------------- */
add_theme_support( 'html5', array(
'search-form', 'comment-form', 'comment-list', 'gallery', 'caption',
) );/* ----------------------------------------------------------------------------
* Modify admin footer text
* ------------------------------------------------------------------------- */
function modify_admin_footer() {
echo 'Created by <a href="mailto:[email protected]">you</a>.';
}
add_filter( 'admin_footer_text', 'modify_admin_footer' );/* ----------------------------------------------------------------------------
* Modify excerpt length
* ------------------------------------------------------------------------- */
function custom_excerpt_length( $length ) {
return 25;
}
add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );/* ----------------------------------------------------------------------------
* Change more excerpt
* ------------------------------------------------------------------------- */
function custom_more_excerpt( $more ) {
return '...';
}
add_filter( 'excerpt_more', 'custom_more_excerpt' );For better maintainability of our code, let’s create a PHP class in separate file called simple_settings_page.php in theme folder.
<?php
/* ----------------------------------------------------------------------------
* Create WordPress settings page For custom options
* ------------------------------------------------------------------------- */
// wp-content/themes/your-theme/simple_settings_page.php
// add permission to role editor (or other role) manage the settings page
add_filter( 'option_page_capability_custom_settings_group', 'simple_custom_settings_group_capability' );
function simple_custom_settings_group_capability( $cap ) {
return 'edit_theme_options';
}
class simple_settings_page {
/**
* Array of custom settings/options
**/
private $options;
/**
* Constructor
*/
public function __construct() {
add_action( 'admin_menu', array( $this, 'add_settings_page' ) );
add_action( 'admin_init', array( $this, 'page_init' ) );
}
/**
* Add settings page
* The page will appear in Admin menu
*/
public function add_settings_page() {
add_menu_page(
'Custom Settings', // Page title
'Custom Settings Page', // Title
'edit_pages', // Capability
'custom-settings-page', // Url slug
array( $this, 'create_admin_page' ) // Callback
);
}
/**
* Options page callback
*/
public function create_admin_page() {
// Set class property
$this->options = get_option( 'custom_settings' );
?>
<div class="wrap">
<h2>Custom settings page</h2>
<form method="post" action="options.php">
<?php
// This prints out all hidden setting fields
settings_fields( 'custom_settings_group' );
do_settings_sections( 'custom-settings-page' );
submit_button();
?>
</form>
</div>
<?php
}
/**
* Register and add settings
*/
public function page_init() {
register_setting(
'custom_settings_group', // Option group
'custom_settings', // Option name
array( $this, 'sanitize' ) // Sanitize
);
add_settings_section(
'custom_settings_section', // ID
'Custom Settings', // Title
array( $this, 'custom_settings_section' ), // Callback
'custom-settings-page' // Page
);
add_settings_field(
'custom_setting_1', // ID
'Custom Setting 1', // Title
array( $this, 'custom_setting1_html' ), // Callback
'custom-settings-page', // Page
'custom_settings_section'
);
add_settings_field(
'custom_setting_2',
'Custom Setting 2',
array( $this, 'custom_setting2_html' ),
'custom-settings-page',
'custom_settings_section'
);
}
/**
* Sanitize POST data from custom settings form
*
* @param array $input Contains custom settings which are passed when saving the form
*/
public function sanitize( $input ) {
$sanitized_input= array();
if( isset( $input['custom_setting_1'] ) )
$sanitized_input['custom_setting_1'] = sanitize_text_field( $input['custom_setting_1'] );
if( isset( $input['custom_setting_2'] ) )
$sanitized_input['custom_setting_2'] = sanitize_text_field( $input['custom_setting_2'] );
return $sanitized_input;
}
/**
* Custom settings section text
*/
public function custom_settings_section() {
print('Some text');
}
/**
* HTML for custom setting 1 input
*/
public function custom_setting1_html() {
printf(
'<input type="text" id="custom_setting_1" name="custom_settings[custom_setting_1]" value="%s" />',
isset( $this->options['custom_setting_1'] ) ? esc_attr( $this->options['custom_setting_1']) : ''
);
}
/**
* HTML for custom setting 2 input
*/
public function custom_setting2_html() {
printf(
'<input type="text" id="custom_setting_2" name="custom_settings[custom_setting_2]" value="%s" />',
isset( $this->options['custom_setting_2'] ) ? esc_attr( $this->options['custom_setting_2']) : ''
);
}
}Let’s instantiate this class in our functions.php file:
if( is_admin() ) {
require 'simple_settings_page.php';
new simple_settings_page();
}When you will want to get those options somewhere else, just use get_option function, like this:
$custom_settings = get_option( 'custom_settings' );
$custom_setting_1 = $custom_settings['custom_setting_1'];
$custom_setting_2 = $custom_settings['custom_setting_2'];/* ----------------------------------------------------------------------------
* Related Posts Function, matches posts by tags - call using simple_related_posts();
* ------------------------------------------------------------------------- */
function simple_related_posts() {
global $post;
$tags = wp_get_post_tags( $post->ID );
if($tags) {
foreach( $tags as $tag ) {
$tag_arr .= $tag->slug . ',';
}
$args = array(
'post_type' => array ( 'post', 'news' ), /* Add post types of your choice */
'tag' => $tag_arr,
'numberposts' => 3, /* You can change this to show more */
'post__not_in' => array( $post->ID )
);
$related_posts = get_posts( $args );
if($related_posts) {
echo '<div class="related-posts">';
foreach ( $related_posts as $post ) : setup_postdata( $post );
echo '<p><a href="' . get_permalink() . '">' . get_the_title() . ' ></a></p>';
endforeach;
echo '</div>';
}
}
wp_reset_postdata();
}A custom WordPress nav walker class to implement the Bootstrap 3 navigation style in a custom theme using the WordPress built in menu manager.
MIT License © Cool WP Functions