carlodaniele

<?php
/**
 * Customize WordPress Toolbar
 *
 * @param obj $wp_admin_bar An instance of the global object WP_Admin_Bar
 */
function myplugin_customize_toolbar( $wp_admin_bar ){
	$user = wp_get_current_user();

	if ( ! ( $user instanceof WP_User ) ){

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
/**
 * Redirect user after successful login.
 *
 * @param string $redirect_to URL to redirect to.
 * @param string $request URL the user is coming from.
 * @param object $user Logged user's data.
 * @return string
 */
function frontend_login_redirect( $redirect_to, $request, $user ) {

carlodaniele

<?php
/**
 * Print an extra field into the login form
 *
 * @link https://codex.wordpress.org/Plugin_API/Action_Reference/login_form
 */
function my_login_extra_field() {
    ?>
    <p>
    	<label for="rd"><?php _e( 'Take me to' ); ?></label>

carlodaniele

<?php
/**
 * Redirect user on login.
 *
 * @param string $redirect_to URL to redirect to.
 * @param string $request URL the user is coming from.
 * @param object $user Logged user's data.
 * @return string
 *
 * @link https://codex.wordpress.org/Plugin_API/Filter_Reference/login_redirect

carlodaniele

<h1>
	<a href="https://wordpress.org/" title="Powered by WordPress" tabindex="-1">Example WordPress website</a>
</h1>

carlodaniele

<?php
$keys = array(
	'error', 
	'm', 
	'p', 
	'post_parent', 
	'subpost', 
	'subpost_id', 
	'attachment', 
	'attachment_id', 

carlodaniele

<?php
/**
 * @package notify
 * @version 1.0
 */
/*
Plugin Name: Notify Me
Plugin URI: http://wordpress.org/extend/plugins/#
Description: This is an example plugin fo ioProgrammo readers
Author: Carlo Daniele

carlodaniele

array(
	array(
		'key'		=> 'field_name',
		'value'		=> 'field_value',
		'type'		=> 'field_type',
		'compare'	=> 'logic_operator'
	)
)

carlodaniele

<?php
/**
 * Register custom query vars
 *
 * @param array $vars The array of available query variables
 *
 * @link https://codex.wordpress.org/Plugin_API/Filter_Reference/query_vars
 */
function myplugin_register_query_vars( $vars ) {
	$vars[] = 'book-author';