Useful Wordpress functions

functions.php

<?php

// Dequeue functions.js -> Contains handlers for navigation and widget area.
function buxum_dequeue_script() {
	wp_dequeue_script( 'twentysixteen-script' );
}
add_action( 'wp_print_scripts', 'buxum_dequeue_script', 100 );

// Hide admin bar
function my_function_admin_bar(){ return false; }
add_filter( 'show_admin_bar' , 'my_function_admin_bar');

// Proper way to enqueue scripts and styles.
function buxum_child_scripts() {
	wp_enqueue_style( 'style-name', get_stylesheet_uri() );
	wp_enqueue_script( 'buxum-main', get_stylesheet_directory_uri() . '/js/main.js', array('jquery'), '1.0.0', true );
	// Use for ajax calls
	wp_localize_script('buxum-main', 'ajaxurl', admin_url( 'admin-ajax.php' ) );
}
add_action( 'wp_enqueue_scripts', 'buxum_child_scripts' );

add_action( 'init', 'create_post_type' );
function create_post_type() {
	// Custom post type with single
	register_post_type( 'product', // Name of post type
		array(
			'labels' => array(
				'name' => __( 'Products' ),
				'singular_name' => __( 'Product' )
			),
			'public' => true, // False for no single page
			'has_archive' => true, // Archive page
			'rewrite' => array('slug' => 'products'), // Name of clean url
			'supports' => array ('title', 'editor', 'thumbnail') // Available fields
		)
	);

	// Custom post type without single
	register_post_type( 'store',
		array(
			'labels' => array(
				'name' => __( 'Magasins' ),
				'all_items' => __('Tous les magasins'),
				'singular_name' => __( 'Magasin' )
			),
			'public' => true,
			'exclude_from_search' => true,
			'show_in_admin_bar' => true,
			'show_in_nav_menus' => false,
			'publicly_queryable' => false,
			'query_var' => false,
			'supports' => array('title', 'editor', 'thumbnail', 'excerpt'),
		)
	);
	
	// Custom taxonomy
	register_taxonomy(
		'genre', // Name of taxonomy
		'book', // Name of post, possibility to link to multiple post: array('post_type_1', post_type_2)
		array(
			'label' => __( 'Genre' ),
			'public' => false,	// Set to true if the taxonomy must be accessible by front user
			'rewrite' => false,	// Set to true if the taxonomy must be accessible by front user
			'hierarchical' => true,
		)
	);
}

// Custom image sizes
add_action( 'after_setup_theme', 'custom_image_size' );
function custom_image_size() {
	add_image_size( 'category-thumb', 300 ); // 300 pixels wide (and unlimited height)
	add_image_size( 'homepage-thumb', 220, 180, true ); // true = cropped
}

// Image size in admin
add_filter( 'image_size_names_choose', 'buxum_image_sizes_admin' );
function buxum_image_sizes_admin( $sizes ) {
	return array_merge( $sizes, array(
		'content' => __( 'Image de contenu' ),
	) );
}

// Set max page content width (Change 1360), image won't be able to be bigger than this number
function buxum_content_width() {
	$GLOBALS['content_width'] = apply_filters( 'buxum_content_width', 1360 );
}
add_action( 'template_redirect', 'buxum_content_width', 0 );
add_action( 'admin_init', 'buxum_content_width', 0 );

// Function for ajax calls
add_action( 'wp_ajax_ajax_call', 'ajax_call' );
add_action( 'wp_ajax_nopriv_ajax_call', 'ajax_call' );
function ajax_call(){
	exit(); // Prevent from returning 0
}

// Email obfuscation shortcode
// Use: [email mailto="example@example.com" text="Contact us|example@example.com"]
function email_func( $atts ) {
	$atts = shortcode_atts( array(
		'mailto' => '',
		'text' => ''
	), $atts, 'email' );

	$email_link = '<a href="'.antispambot('mailto:'.$atts['mailto']).'">'.antispambot($atts['text']).'</a>';

	return $email_link;
}
add_shortcode( 'email', 'email_func' );

?>