carlodaniele

<?php
/**
 * Store custom field meta box data
 *
 * @param int $post_id The post ID.
 */
function food_save_meta_boxes_data( $post_id ){
	// code here
}
add_action( 'save_post_food', 'food_save_meta_boxes_data', 10, 2 );

carlodaniele

<?php
// verify meta box nonce
if ( !isset( $_POST['food_meta_box_nonce'] ) || !wp_verify_nonce( $_POST['food_meta_box_nonce'], basename( __FILE__ ) ) ){
	return;
}

carlodaniele

<?php
// return if autosave
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ){
	return;
}

carlodaniele

<?php
// Check the user's permissions.
if ( ! current_user_can( 'edit_post', $post_id ) ){
	return;
}

carlodaniele

<?php
// store custom fields values
// cholesterol string
if ( isset( $_REQUEST['cholesterol'] ) ) {
	update_post_meta( $post_id, '_food_cholesterol', sanitize_text_field( $_POST['cholesterol'] ) );
}

// store custom fields values
// carbohydrates string
if ( isset( $_REQUEST['carbohydrates'] ) ) {

carlodaniele

<?php
/**
 * Store custom field meta box data
 *
 * @param int $post_id The post ID.
 * @link https://codex.wordpress.org/Plugin_API/Action_Reference/save_post
 */
function food_save_meta_box_data( $post_id ){
	// verify taxonomies meta box nonce
	if ( !isset( $_POST['food_meta_box_nonce'] ) || !wp_verify_nonce( $_POST['food_meta_box_nonce'], basename( __FILE__ ) ) ){

carlodaniele

<?php
/**
 * @package Food_example_plugin
 * @version 1.0
 */
/*
Plugin Name: Food example plugin
Plugin URI: http://wordpress.org/extend/plugins/#
Description: This is an example plugin for WPMU DEV readers
Author: Carlo Daniele

carlodaniele

<?php
/**
 * Remove WordPress Toolbar for subscribers
 */
function myplugin_remove_admin_bar() {
	if ( ! current_user_can( 'publish_posts' ) ) {
		show_admin_bar( false );
	}
}
add_action( 'plugins_loaded', 'myplugin_remove_admin_bar' );

carlodaniele

<?php show_admin_bar( false ); ?>

carlodaniele

<?php
/**
 * Remove WordPress Toolbar for all users except admins and editors
 *
 */
function mytheme_remove_admin_bar() {
	if ( ! current_user_can( 'publish_posts' ) ) {
		show_admin_bar( false );
	}
}