How to Optimize Website Speed in WordPress (Simple Guide)

    
/**
 * We will Dequeue the jQuery UI script as example.
 *
 * Hooked to the wp_print_scripts action, with a late priority (99),
 * so that it is after the script was enqueued.
 */
function wp_remove_scripts() {
 // check if user is admin
 if (current_user_can( 'update_core' )) {
            return;
        }
 else {
    // Check for the page you want to target
    if ( is_page( 'homepage' ) ) {
        // Remove Scripts
        wp_dequeue_style( 'jquery-ui-core' );
     }
 }
}
add_action( 'wp_enqueue_scripts', 'wp_remove_scripts', 99 );
    
  

    
add_filter( 'the_content', 'add_image_dimensions' );

function add_image_dimensions( $content ) {

    preg_match_all( '/<img[^>]+>/i', $content, $images);

    if (count($images) < 1)
        return $content;

    foreach ($images[0] as $image) {
        preg_match_all( '/(alt|title|src|width|class|id|height)=("[^"]*")/i', $image, $img );

        if ( !in_array( 'src', $img[1] ) )
            continue;

        if ( !in_array( 'width', $img[1] ) || !in_array( 'height', $img[1] ) ) {
            $src = $img[2][ array_search('src', $img[1]) ];
            $alt = in_array( 'alt', $img[1] ) ? ' alt=' . $img[2][ array_search('alt', $img[1]) ] : '';
            $title = in_array( 'title', $img[1] ) ? ' title=' . $img[2][ array_search('title', $img[1]) ] : '';
            $class = in_array( 'class', $img[1] ) ? ' class=' . $img[2][ array_search('class', $img[1]) ] : '';
            $id = in_array( 'id', $img[1] ) ? ' id=' . $img[2][ array_search('id', $img[1]) ] : '';
            list( $width, $height, $type, $attr ) = getimagesize( str_replace( "\"", "" , $src ) );

            $image_tag = sprintf( '<img src=%s%s%s%s%s width="%d" height="%d" />', $src, $alt, $title, $class, $id, $width, $height );
            $content = str_replace($image, $image_tag, $content);
        }
    }

    return $content;
}
    
  

    
add_filter( 'elementor_pro/custom_fonts/font_display', function( $current_value, $font_family, $data ) {
    return 'swap';
}, 10, 3 );
    
  

    
/**
 * Convert Uploaded Images to WebP Format
 *
 * This snippet converts uploaded images (JPEG, PNG, GIF) to WebP format
 * automatically in WordPress. Ideal for use in a theme's functions.php file,
 * or with plugins like Code Snippets or WPCodeBox.
 *
 * @package    WordPress_Custom_Functions
 * @author     Mark Harris
 * @link       www.christchurchwebsolutions.co.uk
 *
 * Usage Instructions:
 * - Add this snippet to your theme's functions.php file, or add it as a new
 *   snippet in Code Snippets or WPCodeBox.
 * - The snippet hooks into WordPress's image upload process and converts
 *   uploaded images to the WebP format.
 *
 * Optional Configuration:
 * - By default, the original image file is deleted after conversion to WebP.
 *   If you prefer to keep the original image file, simply comment out or remove
 *   the line '@unlink( $file_path );' in the wpturbo_handle_upload_convert_to_webp function.
 *   This will preserve the original uploaded image file alongside the WebP version.
 */

add_filter( 'wp_handle_upload', 'wpturbo_handle_upload_convert_to_webp' );

function wpturbo_handle_upload_convert_to_webp( $upload ) {
    if ( $upload['type'] == 'image/jpeg' || $upload['type'] == 'image/png' || $upload['type'] == 'image/gif' ) {
        $file_path = $upload['file'];

        // Check if ImageMagick or GD is available
        if ( extension_loaded( 'imagick' ) || extension_loaded( 'gd' ) ) {
            $image_editor = wp_get_image_editor( $file_path );
            if ( ! is_wp_error( $image_editor ) ) {
                $file_info = pathinfo( $file_path );
                $dirname   = $file_info['dirname'];
                $filename  = $file_info['filename'];

                // Create a new file path for the WebP image
                $new_file_path = $dirname . '/' . $filename . '.webp';

                // Attempt to save the image in WebP format
                $saved_image = $image_editor->save( $new_file_path, 'image/webp' );
                if ( ! is_wp_error( $saved_image ) && file_exists( $saved_image['path'] ) ) {
                    // Success: replace the uploaded image with the WebP image
                    $upload['file'] = $saved_image['path'];
                    $upload['url']  = str_replace( basename( $upload['url'] ), basename( $saved_image['path'] ), $upload['url'] );
                    $upload['type'] = 'image/webp';

                    // Optionally remove the original image
                    @unlink( $file_path );
                }
            }
        }
    }

    return $upload;
}
    
  

    
add_filter( 'wp_lazy_loading_enabled', '__return_false' );