Snippets Archives - WordPress

Adding or Including custom post type to default WordPress loop

Snippets

Adding or Including custom post type to default WordPress loop by altering the ‘pre_get_posts’ function. Here it use add_action() function. This will help to display those posts (custom posts) alongside the default posts in the regular post feed.

Add this in you functions.php file

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function add_custom_post_type_to_query( $query ) {

if ( $query->is_home() && $query->is_main_query() ) {

// if ( is_home() ) { // Use this if its not for main query

$query->set( 'post_type', array('post', '2nd-post-type', '3rd-post-type') );

}

add_action( 'pre_get_posts', 'add_custom_post_type_to_query' );

How to Limit or Disable WordPress Post Revisions

Snippets

Limit the number of posts revisions that WordPress stores in the database.

Post Revisions

edit wp-config.php file in WordPress root:

1	define( 'WP_POST_REVISIONS', 3 );

WP_POST_REVISIONS:

true (default), -1: store every revision
false, 0: do not store any revisions (except

Multisite – List Recent Posts Across an Entire Network

Snippets

In Multisite, List Recent Posts Across an Entire Network by using custom query or WP_Query you can list all recent post across the network.

This SQL query also has the potential to become very large. For this reason, we’ll use the Transients API again in a method very similar to what

Disable update notification for individual plugins / All

Snippets

code for the plugin file itself:-

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// remove update notice for forked plugins

function remove_update_notifications($value) {

if ( isset( $value ) && is_object( $value ) ) {

unset( $value->response[ plugin_basename(__FILE__) ] );

}

return $value;

}

add_filter( 'site_transient_update_plugins', 'remove_update_notifications' );

I like to put this in the actual plugin. Since I’ve only ever disabled updates on a plugin because I’ve edited or forked the code and don’t want to lose my edits on an update, I’ve already edited the plugin and thus don’t

How to change the WordPress permalink structure to remove dates from the URLs

Snippets

Switching the permalink structure from /year/month/post-slug to just /post-slug is easy by going to Settings > Permalinks and choosing “Post name”:

But you don’t want any links to your old

Limit character in content and title in wordpress

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function break_text($text, $length = 500){

if(strlen($text)<$length+10) return $text;//don't cut if too short

$break_pos = strpos($text, ' ', $length);//find next space after desired length

$visible = substr($text, 0, $break_pos);

return balanceTags($visible) . " […]";

}

or with readmore

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function limit_text($text){

if(is_front_page())

{

$length = 250;

if(strlen($text)<$length+10) return $text; //don't cut if too short

$break_pos = strpos($text, ' ', $length); //find next space after desired length

$visible = substr($text, 0, $break_pos);

return balanceTags($visible) . "... <a href='".get_permalink()."'>read more</a>";

}else{

return $text;

}

Hide page visual editor if certain template is selected

Snippets

add_action( 'init', 'remove_editor_init' );

function remove_editor_init() {
    // If not in the admin, return.
    if ( ! is_admin() ) {
       return;
    }

// Get the post ID on edit post with filter_input super global inspection.
    $current_post_id = filter_input( INPUT_GET, 'post', FILTER_SANITIZE_NUMBER_INT );
    // Get the post ID on update post with filter_input super global inspection.
    $update_post_id = filter_input( INPUT_POST, 'post_ID', FILTER_SANITIZE_NUMBER_INT );

// Check to see if the post ID is set, else return.
    if ( isset( $current_post_id ) ) {
       $post_id = absint( $current_post_id );
    } else if ( isset( $update_post_id ) ) {
       $post_id = absint( $update_post_id );
    } else {
       return;
    }

// Don't do anything unless there is a post_id.
    if ( isset( $post_id ) ) {
       // Get the template of the current post.
       $template_file = get_post_meta( $post_id, '_wp_page_template', true );

// Example of removing page editor for page-your-template.php template.
       if (  'page-your-template.php' === $template_file ) {
           remove_post_type_support( 'page', 'editor' );
           // Other features can also be removed in addition to the editor. See: https://codex.wordpress.org/Function_Reference/remove_post_type_support.
       }
    }
}

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add_action( 'init', 'remove_editor_init' );

function remove_editor_init() {

// If not in the admin, return.

if ( ! is_admin() ) {

return;

}

// Get the post ID on edit post with filter_input super global inspection.

$current_post_id = filter_input( INPUT_GET, 'post', FILTER_SANITIZE_NUMBER_INT );

// Get the post ID on update post with filter_input super global inspection.

$update_post_id = filter_input( INPUT_POST, 'post_ID', FILTER_SANITIZE_NUMBER_INT );

// Check to see if the post ID is set, else return.

if ( isset( $current_post_id ) ) {

$post_id = absint( $current_post_id );

} else if ( isset( $update_post_id ) ) {

$post_id = absint( $update_post_id );

} else {

return;

}

// Don't do anything unless there is a post_id.

if ( isset( $post_id ) ) {

// Get the template of the current post.

$template_file = get_post_meta( $post_id, '_wp_page_template', true );

// Example of removing page editor for page-your-template.php template.

if ( 'page-your-template.php' === $template_file ) {

remove_post_type_support( 'page', 'editor' );

// Other features can also be removed in addition to the editor. See: https://codex.wordpress.org/Function_Reference/remove_post_type_support.

}

Remove Admin Menus

Snippets

add_action( 'admin_menu', 'remove_admin_menus' );
add_action( 'admin_menu', 'remove_admin_submenus' );

//Remove top level admin menus
function remove_admin_menus() {
    remove_menu_page( 'edit-comments.php' );
    remove_menu_page( 'link-manager.php' );
    remove_menu_page( 'tools.php' );
    remove_menu_page( 'plugins.php' );
    remove_menu_page( 'users.php' );
    remove_menu_page( 'options-general.php' );
    remove_menu_page( 'upload.php' );
    remove_menu_page( 'edit.php' );
    remove_menu_page( 'edit.php?post_type=page' );
    remove_menu_page( 'themes.php' );
}

//Remove sub level admin menus
function remove_admin_submenus() {
    remove_submenu_page( 'themes.php', 'theme-editor.php' );
    remove_submenu_page( 'themes.php', 'themes.php' );
    remove_submenu_page( 'edit.php', 'edit-tags.php?taxonomy=post_tag' );
    remove_submenu_page( 'edit.php', 'edit-tags.php?taxonomy=category' );
    remove_submenu_page( 'edit.php', 'post-new.php' );
    remove_submenu_page( 'themes.php', 'nav-menus.php' );
    remove_submenu_page( 'themes.php', 'widgets.php' );
    remove_submenu_page( 'themes.php', 'theme-editor.php' );
    remove_submenu_page( 'plugins.php', 'plugin-editor.php' );
    remove_submenu_page( 'plugins.php', 'plugin-install.php' );
    remove_submenu_page( 'users.php', 'users.php' );
    remove_submenu_page( 'users.php', 'user-new.php' );
    remove_submenu_page( 'upload.php', 'media-new.php' );
    remove_submenu_page( 'options-general.php', 'options-writing.php' );
    remove_submenu_page( 'options-general.php', 'options-discussion.php' );
    remove_submenu_page( 'options-general.php', 'options-reading.php' );
    remove_submenu_page( 'options-general.php', 'options-discussion.php' );
    remove_submenu_page( 'options-general.php', 'options-media.php' );
    remove_submenu_page( 'options-general.php', 'options-privacy.php' );
    remove_submenu_page( 'options-general.php', 'options-permalinks.php' );
    remove_submenu_page( 'index.php', 'update-core.php' );
}

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add_action( 'admin_menu', 'remove_admin_menus' );

add_action( 'admin_menu', 'remove_admin_submenus' );

//Remove top level admin menus

function remove_admin_menus() {

remove_menu_page( 'edit-comments.php' );

remove_menu_page( 'link-manager.php' );

remove_menu_page( 'tools.php' );

remove_menu_page( 'plugins.php' );

remove_menu_page( 'users.php' );

remove_menu_page( 'options-general.php' );

remove_menu_page( 'upload.php' );

remove_menu_page( 'edit.php' );

remove_menu_page( 'edit.php?post_type=page' );

remove_menu_page( 'themes.php' );

}

//Remove sub level admin menus

function remove_admin_submenus() {

remove_submenu_page( 'themes.php', 'theme-editor.php' );

remove_submenu_page( 'themes.php', 'themes.php' );

remove_submenu_page( 'edit.php', 'edit-tags.php?taxonomy=post_tag' );

remove_submenu_page( 'edit.php', 'edit-tags.php?taxonomy=category' );

remove_submenu_page( 'edit.php', 'post-new.php' );

remove_submenu_page( 'themes.php', 'nav-menus.php' );

remove_submenu_page( 'themes.php', 'widgets.php' );

remove_submenu_page( 'themes.php', 'theme-editor.php' );

remove_submenu_page( 'plugins.php', 'plugin-editor.php' );

remove_submenu_page( 'plugins.php', 'plugin-install.php' );

remove_submenu_page( 'users.php', 'users.php' );

remove_submenu_page( 'users.php', 'user-new.php' );

remove_submenu_page( 'upload.php', 'media-new.php' );

remove_submenu_page( 'options-general.php', 'options-writing.php' );

remove_submenu_page( 'options-general.php', 'options-discussion.php' );

remove_submenu_page( 'options-general.php', 'options-reading.php' );

remove_submenu_page( 'options-general.php', 'options-discussion.php' );

remove_submenu_page( 'options-general.php', 'options-media.php' );

remove_submenu_page( 'options-general.php', 'options-privacy.php' );

remove_submenu_page( 'options-general.php', 'options-permalinks.php' );

remove_submenu_page( 'index.php', 'update-core.php' );

}

has_post_thumbnail() not working

Snippets

Assuming that you’re in The Loop, you can fix this problem, by replacing:

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if ( has_post_thumbnail() ) {

// do a bunch of stuff

}

with

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$featured_image_url = wp_get_attachment_url( get_post_thumbnail_id( get_the_ID() ) );

if ( ! empty( $featured_image_url ) ) {

// do a bunch of stuff

}

Display admin menu urls – debug

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add_action( 'admin_init', 'wpse_136058_debug_admin_menu' );

function wpse_136058_debug_admin_menu() {

echo '<pre>' . print_r( $GLOBALS[ 'menu' ], TRUE) . '</pre>';

}

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