晚上好。我编写了一个函数,使用foreach
循环以编程方式为我们的每个YouTube视频插入一个Wordpress帖子。
一切正常,直到我插入帖子缩略图。我正在使用一个自动处理缩略图的上传和插入,并将其与帖子关联的函数(如下):
function Generate_Featured_Image($image_url, $post_id) {
$upload_dir = wp_upload_dir();
$image_data = file_get_contents($image_url);
$filename = basename($post_id.'-'.$image_url);
if (wp_mkdir_p($upload_dir['path'])) $file = $upload_dir['path'] . '/' . $filename;
else $file = $upload_dir['basedir'] . '/' . $filename;
file_put_contents($file, $image_data);
$wp_filetype = wp_check_filetype($filename, null );
$attachment = array(
'post_mime_type' => $wp_filetype['type'],
'post_title' => sanitize_file_name($filename),
'post_content' => '',
'post_status' => 'inherit'
);
$attach_id = wp_insert_attachment( $attachment, $file, $post_id );
require_once(ABSPATH . 'wp-admin/includes/image.php');
$attach_data = wp_generate_attachment_metadata( $attach_id, $file );
$res1 = wp_update_attachment_metadata( $attach_id, $attach_data );
$res2 = set_post_thumbnail( $post_id, $attach_id );
}
此功能确实有效,但出于某些奇怪的原因,它仅上载循环中最后一个视频的图像。例如,如果我有5个视频,将创建5个帖子。每个都包含自己的特定信息,但帖子缩略图都将是最后(第5个)视频的图像。他们都没有自己的缩略图。
这是我创建帖子的函数的精简版:
function createYouTubePost() {
...some other code...
$JSON = file_get_contents('https://www.googleapis.com/youtube/v3/search?order='.$api_order.'&part='.$api_part.'&channelId='.$channel_id.'&maxResults='.$max_results.'&key='.$api_key);
$json_data = json_decode($JSON, true);
foreach ($json_data['items'] as $data) {
$video_id = $data['id']['videoId'];
$video_title = $data['snippet']['title'];
$video_description = $data['snippet']['description'];
$video_thumb_url = $data['snippet']['thumbnails']['high']['url'];
$video_thumb_width = $data['snippet']['thumbnails']['high']['width'];
$video_thumb_height = $data['snippet']['thumbnails']['high']['height'];
$video_publish_date = $data['snippet']['publishedAt'];
$args = array(
'post_title' => substr($video_title, 0, strrpos($video_title, '(')),
'post_content' => $video_description,
'post_status' => 'publish',
'post_type' => 'download',
);
if (!if_download_exists(substr($video_title, 0, strrpos($video_title, '(')))) {
$new_post_id = wp_insert_post($args, true);
if ($new_post_id == 0) {
echo '<br>Could not create the post.';
var_dump($new_post_id);
}
else {
Generate_Featured_Image($video_thumb_url, $new_post_id);
...lots of code to update various post_meta fields...
echo '<br>New post created.<br>';
var_dump($new_post_id);
}
}
}
}
在这里,您可以看到媒体附件以及它们的相同之处:
以下是创建的各个帖子:
如您所见,每个图像都被分配到其各自的帖子,但是图像是相同的。
我什至尝试为每个图片的文件名设置一个唯一的ID,以使它们都不同,但这并没有帮助。我还确认了我传递给函数的图像URL都是不同的。
我的问题是,如果我在
Generate_Featured_Image()
循环中使用函数foreach
并为其提供唯一信息,为什么它仅使用循环中的最后一张图片?谢谢你的帮助!
最佳答案
我提出了另一种解决方案。 Wordpress的media_sideload_image()
函数可以正常工作,这是针对我的情况的更直接的解决方案。
这是我现在用来为帖子分配缩略图的功能:
function generateFeaturedImage($image_url, $post_id) {
// required libraries for media_sideload_image
require_once(ABSPATH . 'wp-admin/includes/file.php');
require_once(ABSPATH . 'wp-admin/includes/media.php');
require_once(ABSPATH . 'wp-admin/includes/image.php');
// $post_id == the post you want the image to be attached to
// $video_thumb_url == the vimeo video's thumb url
// $description == optional description
// load the image
$result = media_sideload_image($image_url, $post_id);
// then find the last image added to the post attachments
$attachments = get_posts(array('numberposts' => '1', 'post_parent' => $post_id, 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC'));
if (sizeof($attachments) > 0) {
// set image as the post thumbnail
set_post_thumbnail($post_id, $attachments[0]->ID);
}
}
这是我发现的堆栈交换解决方案的the link。
关于php - 在foreach循环中生成Wordpress特色图片,为多个帖子显示同一图片,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40697940/