Archives: Snippets | Page 19

WordPress lets you create an excerpt for posts by entering text in the excerpt box on the post edit screen. But excerpts are not available for pages, and there is no way to enable this through the WordPress admin.

If you want to add the excerpt box for pages too, add the following code to your theme’s functions.php file:

<?php

// START COPY FROM HERE
function add_excerpt_pages() {
    add_post_type_support('page', 'excerpt');
}
add_action('init', 'add_excerpt_pages');

After adding the code, edit a page and click “Screen options” in the top-left corner of the screen.

How to enable excerpt for pages in WordPress

Check the Excerpt box and you are done. You will now see an excerpt box for all pages on your site…

For safe theme customizations, see What Are Child Themes and How to Use Them.

Use the following code to change the number of products WooCommerce displays per page. For this to work, make sure the “Products per page” option is selected in Customizer.

Add this code to your theme’s functions.php file:

/**
 * Change number of products that are displayed per page (shop page)
 */
add_filter( 'loop_shop_per_page', 'new_loop_shop_per_page', 20 );

function new_loop_shop_per_page( $cols ) {
  // $cols contains the current number of products per page based on the value stored on Options –> Reading
  // Return the number of products you wanna show per page.
  $cols = 9;
  return $cols;
}

For more WooCommerce customization, see Mastering WooCommerce Hooks.

To completely disable WordPress search, add the following code to your theme’s functions.php file:

<?php function sv_filter_query($query, $error = true) {
    if (is_search()) {
        $query->is_search = false;
        $query->query_vars[s] = false;
        $query->query[s] = false;
        if ($error == true)
            $query->is_404 = true;
    }
}

add_action('parse_query', 'sv_filter_query');
add_filter('get_search_form', create_function('$a', "return null;"));
    
function remove_search_widget() {
    unregister_widget('WP_Widget_Search');
}

add_action('widgets_init', 'remove_search_widget');

Ever wondered how to limit search results to a specific Custom Post Type? It is simple. We have already seen how to completely disable WordPress search by modifying functions.php. Now we will do something similar to filter our search results.

Add the following code to your functions.php file:

function sv_search_filter($query) {
 
    if ($query->is_search && !is_admin() ) {
        $query->set('post_type',array('post','page'));
    }
 
return $query;
}
 
add_filter('pre_get_posts','sv_search_filter');

Note this line:

$query->set('post_type',array('post','page'));

You can filter search results by changing the values in that array. Search results will now show only pages and posts, but you can change this array to include any post type you want.

By default, WooCommerce displays all shipping options on the cart and checkout pages. If you want to show only the free shipping option on these pages, add the following code to functions.php:

/**
 * Hide shipping rates when free shipping is available.
 * Updated to support WooCommerce 2.6 Shipping Zones.
 *
 * @param array $rates Array of rates found for the package.
 * @return array
 * @link https://docs.woocommerce.com/document/hide-other-shipping-methods-when-free-shipping-is-available/
 */
function prefix_hide_shipping_when_free_is_available( $rates ) {
	$free = array();
	foreach ( $rates as $rate_id => $rate ) {
		if ( 'free_shipping' === $rate->method_id ) {
			$free[ $rate_id ] = $rate;
			break;
		}
	}
	return ! empty( $free ) ? $free : $rates;
}
add_filter( 'woocommerce_package_rates', 'prefix_hide_shipping_when_free_is_available', 100 );

Do you load the rtl.css file using the automatic method WordPress provides? That is, adding the rtl.css file to your theme directory so that when the site language is set to right-to-left (RTL), this file loads automatically. It is the preferred way to load RTL-specific CSS for RTL sites.

However, this file has no version (no query string), which makes cache busting difficult in the browser, especially for this file (if you are not using a caching plugin).

To add the ver parameter to the rtl.css file based on when the file was last modified, use the following filter:

add_filter( 'locale_stylesheet_uri', function ($localized_stylesheet_uri) {
    $time_ver = filemtime( get_stylesheet_directory() . '/rtl.css' );
    return add_query_arg( array('ver' => $time_ver), $localized_stylesheet_uri );
});

If you want to change the zoom (magnification) behavior when hovering over a product on the WooCommerce product page, you can use the woocommerce_single_product_zoom_options filter:

add_filter( 'woocommerce_single_product_zoom_options', 'custom_single_product_zoom_options' );
function custom_single_product_zoom_options( $zoom_options ) {
    // Changing the magnification level:
    $zoom_options['magnify'] = 0.7;

    return $zoom_options;
}

Here are the parameters you can change:

$zoom_options = array (
    'url' => false,
    'callback' => false,
    'target' => false,
    'duration' => 120, // Transition in milli seconds (default is 120)
    'on' => 'mouseover', // other options: grab, click, toggle (default is mouseover)
    'touch' => true, // enables a touch fallback
    'onZoomIn' => false,
    'onZoomOut' => false,
    'magnify' => 1, // Zoom magnification: (default is 1  |  float number between 0 and 1)
);

For more WooCommerce product page customization, see Mastering WooCommerce Hooks.

The ACF plugin in version 6.2.5 and above displays a message like this: ACF now automatically escapes unsafe HTML when rendered by the_field or the ACF shortcode. If you know your field content is safe and want to dismiss this message, add the following code to your functions.php file:

function savvy_acf_remove_msg() {
	add_filter('acf/admin/prevent_escaped_html_notice', '__return_true');
	add_filter('acf/shortcode/allow_unsafe_html', '__return_true');
	add_filter('acf/the_field/allow_unsafe_html', '__return_true');
}
add_action('init', 'savvy_acf_remove_msg');

URL Guessing is a built-in WordPress feature that attempts to perform automatic redirects when a user lands on an incorrect URL. In other words, WordPress tries to guess the URL and redirects the user to an address similar to the wrong one entered in the browser bar, so instead of getting a 404 page, the user is redirected to the address WordPress thinks they meant.

To disable this feature, add the following code to your theme’s functions.php file:

<?php

function sv_no_redirect_404($redirect_url)
{
	if (is_404()) {
		return false;
	}
	return $redirect_url;
}
add_filter('redirect_canonical', 'sv_no_redirect_404');