解決AMP找不到特色圖片的錯誤 not foundfeature image url (使用Google推薦外 掛AMP for WP - Accelerated Mobile Pages for WordPress)

因為我的文章幾乎沒有設定特色圖片, 所以AMP當然找不到 image, 一樣的邏輯要去設定讓系統可以抓到第一張圖片, 使用到的語法可以參考這一篇文章: wordpress 快速設定 文章的第一張圖片為縮圖

但是, 當然還是要整合一下, 必須看你使用的外掛或程式碼是如何去撈 image url的
以我自己為例, 使用Google推薦外掛AMP for WP – Accelerated Mobile Pages for WordPress

修改accelerated-mobile-pages/templates/features.php

/* 我的修改開始 */add_action( 'get_feature_image', 'get_feature_image' ); function get_feature_image($post_id = null){ //傳入post_id 參數去指定何篇文章    global $post, $posts; $first_img = '';    if($post_id)    $post = get_post( $post_id );  //可以傳post_id去指定何篇文章    if ( has_post_thumbnail() ) {       $first_img = wp_get_attachment_url( get_post_thumbnail_id() );    } else {       ob_start();       ob_end_clean();       $output = preg_match('/<*img[^>]*src*=*["\']?([^"\']*)/i', $post->post_content, $matches);       $first_img = $matches[1];    }    return $first_img;}/* 我的修改結尾 */	// 13. Add Custom Placeholder Image for Structured Data.	// if there is no image in the post, then use this image to validate Structured Data.	add_filter( 'amp_post_template_metadata', 'ampforwp_update_metadata_featured_image', 10, 2 );	function ampforwp_update_metadata_featured_image( $metadata, $post ) {			global $redux_builder_amp;			global $post;			$post_id = get_the_ID() ;			$post_image_id = get_post_thumbnail_id( $post_id );			$structured_data_image = wp_get_attachment_image_src( $post_image_id, 'full' );			$post_image_check = $structured_data_image;/* 我的修改開始 */						//$structured_data_image_url = '';			$structured_data_image_url = get_feature_image( $post_id );/* 我的修改結尾 */			if ( $post_image_check == false) {				if (! empty( $redux_builder_amp['amp-structured-data-placeholder-image']['url'] ) ) {					$structured_data_image_url = $redux_builder_amp['amp-structured-data-placeholder-image']['url'];				}					$structured_data_image = $structured_data_image_url;					$structured_data_height = intval($redux_builder_amp['amp-structured-data-placeholder-image-height']);					$structured_data_width = intval($redux_builder_amp['amp-structured-data-placeholder-image-width']);					$metadata['image'] = array(						'@type' 	=> 'ImageObject',						'url' 		=> $structured_data_image ,						'height' 	=> $structured_data_height,						'width' 	=> $structured_data_width,					);			}