add_action( ‘init’, ‘blockusers_init’ );
function blockusers_init() {
if ( is_admin() && ! current_user_can( ‘administrator’ ) &&
! ( defined( ‘DOING_AJAX’ ) && DOING_AJAX ) ) {
wp_redirect( home_url() );
exit;
}
}

add_action( ‘init’, ‘blockusers_init’ );
function blockusers_init() {
if ( is_admin() && ! current_user_can( ‘administrator’ ) &&
! ( defined( ‘DOING_AJAX’ ) && DOING_AJAX ) ) {
wp_redirect( home_url() );
exit;
}
}

remove_filter('comment_text', 'make_clickable', 9);

function SearchFilter($query) {
if ($query->is_search) {
$query->set('post_type', 'post');
}
return $query;
}

add_filter('pre_get_posts','SearchFilter');

function fb_filter_query( $query, $error = true ) {

if ( is_search() ) {
$query->is_search = false;
$query->query_vars[s] = false;
$query->query[s] = false;

// to error
if ( $error == true )
$query->is_404 = true;
}
}

add_action( 'parse_query', 'fb_filter_query' );
add_filter( 'get_search_form', create_function( '$a', "return null;" ) );

function wps_registration_redirect(){
return home_url( '/finished/' );
}
add_filter( 'registration_redirect', 'wps_registration_redirect' );

function my_wc_redirect( $redirect, $user ) {
    // $user_id = $user->ID;
    // if(user_can( $user,  )) { // With the user object you can access their saved carts etc. too.
    // $redirect = get_permalink();
    // }
    // OR without depending on the user
    // $redirect = 'https://www.example.com/';
    return $redirect;
}
add_filter( 'woocommerce_login_redirect', 'my_wc_redirect', 10, 2 );

function limit_posts_per_search_page() {
	if ( is_search() )
		set_query_var('posts_per_archive_page', 20); 
}

add_filter('pre_get_posts', 'limit_posts_per_search_page');

add_filter( 'show_admin_bar', '__return_false' );

function my_custom_login_logo() { 
echo 'url';
 }
 add_action('login_head', 'my_custom_login_logo');

function custom_admin_logo() { 
echo 'url';
 }
 add_action('admin_head', 'custom_admin_logo');

function remove_footer_admin () { 
echo 'Some cool text or link'; } 
add_filter('admin_footer_text', 'remove_footer_admin');

add_filter( 'avatar_defaults', 'newgravatar' ); 
function newgravatar ($avatar_defaults) { 
$myavatar = get_bloginfo('template_directory') . '/images/gravatar.gif'; 
$avatar_defaults[$myavatar] = "WPBeginner"; 

return $avatar_defaults;

function my_excerpt_length($length) 
{
return 65; 
}
add_filter('excerpt_length', 'my_excerpt_length');

function new_excerpt_more($text) 
{  
return ' [...]'; 
}
add_filter('excerpt_more', 'new_excerpt_more');

// This will only block users who are NOT an administrator from viewing the website.

function wp_maintenance_mode(){
if(!current_user_can('edit_themes') || !is_user_logged_in()){
wp_die('Maintenance, please come back soon.', 'Maintenance – please come back soon.', array('response' => '503'));
}
}
add_action('get_header', 'wp_maintenance_mode');

function remove_comment_fields($fields) {
    unset($fields['url']);
    return $fields;
}
add_filter('comment_form_default_fields','remove_comment_fields');

add_filter( 'preprocess_comment', 'minimal_comment_length' );
function minimal_comment_length( $commentdata ) {
	$minimalCommentLength = 20;
	if ( strlen( trim( $commentdata['comment_content'] ) ) < $minimalCommentLength )
        {
		wp_die( 'All comments must be at least ' . $minimalCommentLength . ' characters long.' );
        }
	return $commentdata;
}

function php_text($text) {
 if (strpos($text, '<' . '?') !== false) { ob_start(); eval('?' . '>' . $text);
 $text = ob_get_contents();
 ob_end_clean();
 }
 return $text;
}
add_filter('widget_text', 'php_text', 99);

add_filter( 'author_link', 'my_author_link' );

function my_author_link() {
	return home_url( 'page-name-here' );
}

function rkv_url_spamcheck( $approved , $commentdata ) {
return ( strlen( $commentdata['comment_author_url'] ) > 50 ) ? 'spam' : $approved;
  }

 add_filter( 'pre_comment_approved', 'rkv_url_spamcheck', 99, 2 );

add_action('template_redirect', 'redirect_single_post');
function redirect_single_post() {
    if (is_search()) {
        global $wp_query;
        if ($wp_query->post_count == 1 && $wp_query->max_num_pages == 1) {
            wp_redirect( get_permalink( $wp_query->posts['0']->ID ) );
            exit;
        }
    }
}

function itsme_disable_feed() {
wp_die( __( ‘No feed available, please visit the homepage!' ) );
}

add_action(‘do_feed’, ‘itsme_disable_feed’, 1);
add_action(‘do_feed_rdf’, ‘itsme_disable_feed’, 1);
add_action(‘do_feed_rss’, ‘itsme_disable_feed’, 1);
add_action(‘do_feed_rss2’, ‘itsme_disable_feed’, 1);
add_action(‘do_feed_atom’, ‘itsme_disable_feed’, 1);
add_action(‘do_feed_rss2_comments’, ‘itsme_disable_feed’, 1);
add_action(‘do_feed_atom_comments’, ‘itsme_disable_feed’, 1);

function custom_dashboard_widgets() {
global $wp_meta_boxes;
wp_add_dashboard_widget('custom_help_widget', 'Dashboard Widget', 'custom_dashboard_help');
}
function custom_dashboard_help() {
echo '
Hello! I am a dashboard widget.
';
}
add_action('wp_dashboard_setup', 'custom_dashboard_widgets');

function create_custom_post() {
	register_post_type( 'custom-post', // slug for custom post type
		array(
		'labels' => array(
			'name' => __( 'Custom Post' ),
		),
		'public' => true,
		'hierarchical' => true, 
		'has_archive' => true,
		'supports' => array(
			'title',
			'editor',
			'excerpt',
			'thumbnail'
		), 
		'can_export' => true,
		'taxonomies' => array(
				'post_tag',
				'category'
		)
	));
}
add_action('init', 'create_custom_post');

add_action( 'wp_footer', 'awts_openlinks_innnewtab' ); // Write our JS below here
function awts_openlinks_innnewtab() { ?>

$commcount = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->comments WHERE comment_approved = '1'"); 

if (0 < $commcount) $commcount = number_format($commcount); 
echo "Our users have made ".$commcount." comments, care to join in?";

function bs_modified_comment_reply_text( $link ) {
 $link = str_replace( 'Reply', 'Respond', $link );
 return $link;
 }
add_filter( 'comment_reply_link', 'bs_modified_comment_reply_text' );

function excludePages( $query ) {
if ( $query->is_search ) {
	$query->set( 'post_type', 'post' );
}
	return $query;
}
add_filter( 'pre_get_posts','excludePages' );

function add_post_content($content) {
	if(!is_feed() && !is_home()) {
		$content .= '
This article is copyright © '.date('Y').' '.bloginfo('name').'
';
	}
	return $content;
}
add_filter('the_content', 'add_post_content');

function wpc_change_post_to_article( $translated ) {  
$translated = str_ireplace('Post','Article',$translated );// ireplace is PHP5 only  
return $translated;  
}  
// hook the translation filters  
add_filter('gettext','wpc_change_post_to_article');  
add_filter('ngettext','wpc_change_post_to_article');

// usage: [member] only logged in users can see this text[/member]  
    function wpc_restrict_content( $atts, $content = null ) {  
        if ( is_user_logged_in() &&   
            !is_null($content) &&   
            !is_feed()   
             ) {  

            return $content;  
        } else {  

            return __( 'Sorry, this content is only available for logged users.', 'yourtheme' );  
        }  
    }  
    add_shortcode( 'member', 'wpc_restrict_content' );

function wpc_add_toolbar_menu($admin_bar){  
    $admin_bar->add_menu( array(  
        'id'    => 'my-link',  
        'title' => 'My link',  
        'href'  => '#',  
        'meta'  => array(  
            'title' => __('My Link'),  
        ),  
    ));  
    $admin_bar->add_menu( array(  
        'id'    => 'my-sub-link',  
        'parent' => 'my-link',  
        'title' => 'My Sub Menu Link',  
        'href'  => '#',  
        'meta'  => array(  
            'title' => __('My Sub Menu Link'),  
            'target' => '_blank',  
            'class' => 'my_menu_item_class'  
        ),  
    ));  
    $admin_bar->add_menu( array(  
        'id'    => 'my-second-sub-link',  
        'parent' => 'my-link',  
        'title' => 'My Second Sub Menu Link',  
        'href'  => '#',  
        'meta'  => array(  
            'title' => __('My Second Sub Menu Link'),  
            'target' => '_blank',  
            'class' => 'my_menu_item_class'  
        ),  
    ));  
}  
add_action('admin_bar_menu', 'wpc_add_toolbar_menu', 100);

function wpc_adminbar_custom_links() {  
    global $wp_admin_bar;  
    $wp_admin_bar->add_menu( array(  
        'parent' => false, // use 'false' for a root menu, or pass the ID of the parent menu  
        'id' => 'settings_general', // link ID, defaults to a sanitized title value  
        'title' => __('General Options'), // link title  
        'href' => admin_url( 'options-general.php'), // name of file  
        'meta' => array( 'html' => '', 'class' => '', 'onclick' => '', 'target' => '', 'title' => '' )  
    ));  
}  
add_action( 'wp_before_admin_bar_render', 'wpc_adminbar_custom_links' );

function wpc_auto_redirect_after_logout(){  
  wp_redirect( home_url() );  
  exit();  
}  
add_action('wp_logout','wpc_auto_redirect_after_logout');

function wpc_redirect_after_comment(){  
      wp_redirect('/thank-you/');  
      exit();  
}  
add_filter('comment_post_redirect', 'wpc_redirect_after_comment');

add_action('wp_footer', 'external_link_tab');
function external_link_tab(){
?>

add_action( 'init', 'wpse31629_init' );
function wpse31629_init()
{
	add_post_type_support( 'post', 'page-attributes' );
}

//Record user's last login to custom meta
add_action( 'wp_login', 'smartwp_capture_login_time', 10, 2 );

function smartwp_capture_login_time( $user_login, $user ) {
  update_user_meta( $user->ID, 'last_login', time() );
}

//Register new custom column with last login time
add_filter( 'manage_users_columns', 'smartwp_user_last_login_column' );
add_filter( 'manage_users_custom_column', 'smartwp_last_login_column', 10, 3 );

function smartwp_user_last_login_column( $columns ) {
	$columns['last_login'] = 'Last Login';
	return $columns;
}

function smartwp_last_login_column( $output, $column_id, $user_id ){
	if( $column_id == 'last_login' ) {
    $last_login = get_user_meta( $user_id, 'last_login', true );
    $date_format = 'M j, Y';
    $hover_date_format = 'F j, Y, g:i a';
    
		$output = $last_login ? '
'.human_time_diff( $last_login ).'
' : 'No record';
	}
  
	return $output;
}

//Allow the last login columns to be sortable
add_filter( 'manage_users_sortable_columns', 'smartwp_sortable_last_login_column' );
add_action( 'pre_get_users', 'smartwp_sort_last_login_column' );

function smartwp_sortable_last_login_column( $columns ) {
	return wp_parse_args( array(
	 	'last_login' => 'last_login'
	), $columns );
 
}

function smartwp_sort_last_login_column( $query ) {
	if( !is_admin() ) {
		return $query;
	}
 
	$screen = get_current_screen();
 
	if( isset( $screen->id ) && $screen->id !== 'users' ) {
		return $query;
	}
 
	if( isset( $_GET[ 'orderby' ] ) && $_GET[ 'orderby' ] == 'last_login' ) {
 
		$query->query_vars['meta_key'] = 'last_login';
		$query->query_vars['orderby'] = 'meta_value';
 
	}
 
  return $query;
}

add_filter( 'woocommerce_email_order_items_args', 'iconic_email_order_items_args', 10, 1 );
function iconic_email_order_items_args( $args ) {
    $args['show_image'] = true;
    return $args;
}

add_filter( 'woocommerce_order_item_name', 'display_product_image_in_order_item', 20, 3 );
function display_product_image_in_order_item( $item_name, $item, $is_visible ) {
    // Targeting view order pages only
    if( is_wc_endpoint_url( 'view-order' ) ) {
        $product   = $item->get_product(); // Get the WC_Product object (from order item)
        $thumbnail = $product->get_image(array( 36, 36)); // Get the product thumbnail (from product object)
        if( $product->get_image_id() > 0 )
            $item_name = '
' . $thumbnail . '
' . $item_name;
    }
    return $item_name;
}

add_filter( 'woocommerce_order_item_name', 'order_received_item_thumbnail_image', 10, 3 );
function order_received_item_thumbnail_image( $item_name, $item, $is_visible ) {
    // Targeting order received page only
    if( ! is_wc_endpoint_url('order-received') ) return $item_name;

    // Get the WC_Product object (from order item)
    $product = $item->get_product();

    if( $product->get_image_id() > 0 ){
        $product_image =  . $product->get_image(array(48, 48)) . '';
        $item_name = $product_image . $item_name;
    }

    return $item_name;
}

add_filter( 'woocommerce_cart_item_name', 'ts_product_image_on_checkout', 10, 3 );
 
function ts_product_image_on_checkout( $name, $cart_item, $cart_item_key ) {
     
    /* Return if not checkout page */
    if ( ! is_checkout() ) {
        return $name;
    }
     
    /* Get product object */
    $_product = apply_filters( 'woocommerce_cart_item_product', $cart_item['data'], $cart_item, $cart_item_key );
 
    /* Get product thumbnail */
    $thumbnail = $_product->get_image();
 
    /* Add wrapper to image and add some css */
    $image = '
'
                . $thumbnail .
            '
'; 
 
    /* Prepend image to name and return it */
    return $image . $name;
}

add_action( 'wp_print_scripts', 'DisableStrongPW', 100 );

function DisableStrongPW() {
    if ( wp_script_is( 'wc-password-strength-meter', 'enqueued' ) ) {
        wp_dequeue_script( 'wc-password-strength-meter' );
    }
}

/**
 * Remove the password strength meter script from the scripts queue
 * you can also use wp_print_scripts hook
 */
add_action( 'wp_enqueue_scripts', 'misha_deactivate_pass_strength_meter', 10 );
function misha_deactivate_pass_strength_meter() {
 
	wp_dequeue_script( 'wc-password-strength-meter' );
 
}

add_action( 'woocommerce_payment_complete', 'order_received_empty_cart_action', 10, 1 );
function order_received_empty_cart_action( $order_id ){
    WC()->cart->empty_cart();
}

add_filter('get_comment_author', 'my_comment_author', 10, 1);

function my_comment_author( $author = '' ) {
// Get the comment ID from WP_Query
$comment = get_comment( $comment_ID );
if (!empty($comment->comment_author) ) {
if($comment->user_id > 0){
$user=get_userdata($comment->user_id);
$author=$user->first_name.' '.substr($user->last_name,0,1).'.'; // this is the actual line you want to change
} else {
$author = __('Anonymous');
}
} else {
$author = $comment->comment_author;
}

return $author;
}

// Hide WooCommerce Cart Icon When Empty
add_action( 'wp_footer', function() {
    if ( WC()->cart->is_empty() ) {
        echo '';
    }
});

function juditmatyus_availability( $availability, $product ){   
    // Change "x in stock" text to "Only x left"
    $new_availability_text = 'Only ' . str_replace("spaces", "left", $availability['availability']);
    $availability['availability'] = $new_availability_text;

   // Change "out of stock" text to "Sold Out"
   // if( $availability['class'] == 'out-of-stock' ){ 
   //   $availability['availability'] = 'Classes are full';
   // } 
   // return $availability;
}
add_filter( 'woocommerce_get_availability', 'juditmatyus_availability', 10, 2 );

function modify_gettext( $translated_text, $text, $domain ) {
    switch ( $translated_text ) {
        case 'This product is currently out of stock and unavailable.' :
            $translated_text = __( 'CUSTOM OUT OF TEXT HERE', 'woocommerce' );
            break;
    }
    return $translated_text;
}

add_filter( 'gettext', 'modify_gettext', 20, 3 );

add_filter( 'woocommerce_add_to_cart_validation', 'allowed_quantity_per_category_in_the_cart', 10, 2 );
function allowed_quantity_per_category_in_the_cart( $passed, $product_id) {

    $max_num_products = 1;// change the maximum allowed in the cart
    $running_qty = 0;

    $restricted_product_cats = array();

    //Restrict particular category/categories by category slug
    $restricted_product_cats[] = 'cat-slug-one';
    //$restricted_product_cats[] = 'cat-slug-two';

    // Getting the current product category slugs in an array
    $product_cats_object = get_the_terms( $product_id, 'product_cat' );
    foreach($product_cats_object as $obj_prod_cat) $current_product_cats[]=$obj_prod_cat->slug;


    // Iterating through each cart item
    foreach (WC()->cart->get_cart() as $cart_item_key=>$cart_item ){

    	// Restrict $max_num_products from each category
        // if( has_term( $current_product_cats, 'product_cat', $cart_item['product_id'] )) {

        // Restrict $max_num_products from restricted product categories
        if( array_intersect($restricted_product_cats, $current_product_cats) && has_term( $restricted_product_cats, 'product_cat', $cart_item['product_id'] )) {

        	// count(selected category) quantity
            $running_qty += (int) $cart_item['quantity'];

            // More than allowed products in the cart is not allowed
            if( $running_qty >= $max_num_products ) {
                wc_add_notice( sprintf( 'You can only register %s '.($max_num_products>1?'student':'student').' at a time. If you need to register another student, please complete the checkout process first — then come back.',  $max_num_products ), 'error' );
                $passed = false; // don't add the new product to the cart
                // We stop the loop
                break;
          	}

        }
    }
    return $passed;
}

add_filter( 'woocommerce_order_button_text', 'woo_custom_order_button_text' ); 

function woo_custom_order_button_text() {
    return __( 'Submit Registration', 'woocommerce' ); 
}

add_filter( 'woocommerce_add_to_cart_redirect', 'bbloomer_redirect_checkout_add_cart' );
 
function bbloomer_redirect_checkout_add_cart() {
   return wc_get_checkout_url();
}

add_filter( 'default_checkout_billing_country', 'bbloomer_change_default_checkout_country' );
 
function bbloomer_change_default_checkout_country() {
  return 'US'; 
}