Merge pull request #2641 from QuizandSurveyMaster/CU-85zte5q3u-Preloa…

…d-added-in-Featured-Image

add preload for featured image

php/shortcodes.php

@@ -127,13 +127,13 @@ function qsm_load_main_scripts() {
  * @global obj $wp_query
  */
 function qsm_generate_fb_header_metadata() {
+	global $mlwQuizMasterNext, $wpdb, $wp_query;
 	if ( isset( $_GET['result_id'] ) && '' !== $_GET['result_id'] ) {
 		$settings        = (array) get_option( 'qmn-settings' );
 		$facebook_app_id = '594986844960937';
 		if ( isset( $settings['facebook_app_id'] ) ) {
 			$facebook_app_id = esc_js( $settings['facebook_app_id'] );
 		}
-		global $mlwQuizMasterNext, $wpdb, $wp_query;
 		$result_id    = sanitize_text_field( wp_unslash( $_GET['result_id'] ) );
 		$results_data = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->prefix}mlw_results WHERE unique_id = %s", $result_id ) );
 		if ( $results_data ) {
@@ -194,15 +194,20 @@ function qsm_generate_fb_header_metadata() {
 			$pagename = $post->post_title;
 			$result_id = sanitize_text_field( wp_unslash( $_GET['result_id'] ) );
 			?>
-<meta property="og:url" content="<?php echo esc_url( $sharing_page_id ) . '?result_id=' . esc_attr( $result_id ); ?>" />
-<meta property="og:type" content="article" />
-<meta property="og:title" content="<?php echo esc_attr( $pagename ); ?>" />
-<meta property="og:description" content="<?php echo esc_attr( $sharing ); ?>" />
-<meta property="og:image" content="<?php echo esc_url( $default_fb_image ); ?>" />
-<meta property="fb:app_id" content="<?php echo esc_attr( $facebook_app_id ); ?>" />
-<?php
+			<meta property="og:url" content="<?php echo esc_url( $sharing_page_id ) . '?result_id=' . esc_attr( $result_id ); ?>" />
+			<meta property="og:type" content="article" />
+			<meta property="og:title" content="<?php echo esc_attr( $pagename ); ?>" />
+			<meta property="og:description" content="<?php echo esc_attr( $sharing ); ?>" />
+			<meta property="og:image" content="<?php echo esc_url( $default_fb_image ); ?>" />
+			<meta property="fb:app_id" content="<?php echo esc_attr( $facebook_app_id ); ?>" />
+			<?php
 		}
 	}
+		$quiz_id = $mlwQuizMasterNext->quizCreator->get_id();
+		$featured_image = get_option("quiz_featured_image_$quiz_id");
+		?>	
+		<link rel="preload" href="<?php echo esc_url($featured_image); ?>" as="image">
+		<?php
 }
 
 add_action( 'wp_head', 'qsm_generate_fb_header_metadata' );