我正在写一个Wordpress插件,可以在我的博客上下载远程图像。
我创建了一个在本地上传远程图像,然后返回其ID的函数。 一切似乎都没问题
$attach_data = wp_generate_attachment_metadata( $attach_id, $local_file );
返回一个空数组 - 它不应该。
除其他外,wp_generate_attachment_metadata负责生成上传图像的缩略图。但是当我运行代码时,我没有创建缩略图。
我检查了我发送给函数的值,看起来是正确的:我有一个ID和上传文件的绝对路径,如codex中所述。 不过,我无法让我的代码正常工作:
$ attach_data 不应为空...
有人可以帮忙吗?
function upload_from_remote_url($url,$post_id){
$url = $this->validate_remote_media_url($url); //check file is not on local server
if (!$url) return false;
if ($existing_id = $this->media_already_exists($url)) return $existing_id; //url already has been downloaded
$upload_dir = wp_upload_dir();
$wp_mime_types = wp_get_mime_types();
//fetch image
$response = wp_remote_get( $url );
//get filename without extension
$filename = basename( $url ); //get filename & extension
$filename_strip = preg_replace('/\.[^.]*$/', '', $filename); //strip extension
//get extension from content type,
//because wp_upload_bits needs an extension and certain url don't have one.
$file_type = wp_remote_retrieve_header( $response, 'content-type' );
$extensions = array_search($file_type,$wp_mime_types);
$extensions_arr = explode('|',$extensions);
$extension = $extensions_arr[0];
$new_filename = $filename_strip.'.'.$extension; //full name
$new_filename = wp_unique_filename($upload_dir['path'], $new_filename); // be sure this name do not exist already
$uploaded = wp_upload_bits($new_filename, '', wp_remote_retrieve_body( $response ) );
if ($uploaded['error']) return false;
$local_file = $uploaded['file'];
$local_filename = basename($local_file);
$local_filetype = wp_check_filetype( $local_filename, null );
//Attachment options
$attachment = array(
'post_title'=> $local_filename,
'post_mime_type' => $local_filetype,
'post_status' => 'inherit'
);
// Add the image to your media library
$attach_id = wp_insert_attachment( $attachment, $local_file, $post_id );
if (!$attach_id) return false;
$attach_data = wp_generate_attachment_metadata( $attach_id, $local_file );
wp_update_attachment_metadata( $attach_id, $attach_data );
//save source link so we do not import several times the same media
update_post_meta($attach_id, 'grm_source', $url);
return $attach_id;
}
顺便说一句,如果任何WP gourou对这段代码有什么要说的话......我会很乐意阅读它,因为关于上传文件的WP文档有点乱。我需要一些特定的东西,因为能够检索文件扩展名。我最终得到了这个,但也许你有更好的想法!
答案 0 :(得分:1)
这就是最终为我解决的问题:
apply_filters('wp_handle_upload', array(
'file' => $file_path,
'url' => $file_url,
'type' => $file_type),
'upload');
说明:我不太清楚为什么这会为我修复错误,但我认为这或者与使用wp_handle_upload挂钩的插件有关或者过滤器将元数据添加到附件中,否则会在wp_generate_attachment_metadata函数中缺失。
全功能:
function add_to_media_lib($file_url, $file_path, $parent_post_id)
{
require_once(ABSPATH . 'wp-admin/includes/image.php');
require_once(ABSPATH . 'wp-admin/includes/file.php');
// Check the type of tile. We'll use this as the 'post_mime_type'.
$file_type = wp_check_filetype(basename($file_url), null);
// Get the path to the upload directory.
$wp_upload_dir = wp_upload_dir();
// Prepare an array of post data for the attachment.
$attachment = array(
'guid' => $wp_upload_dir['url'] . '/' . basename($file_url),
'post_mime_type' => $file_type['type'],
'post_title' => preg_replace('/\.[^.]+$/', '', basename($file_url)),
'post_content' => '',
'post_status' => 'inherit',
'post_parent' => $parent_post_id
);
// Insert the attachment.
$attach_id = wp_insert_attachment($attachment, $file_url, $parent_post_id);
// apply filters (important in some environments)
apply_filters('wp_handle_upload', array('file' => $file_path, 'url' => $file_url, 'type' => $file_type), 'upload');
// Generate the metadata for the attachment, and update the database record.
if ($attach_data = wp_generate_attachment_metadata($attach_id, $file_path)) {
wp_update_attachment_metadata($attach_id, $attach_data);
} else {
echo '<div id="message" class="error"><h1>Failed to create PDF-thumbnail Meta-Data</h1><pre>' . print_r($attach_data) . '</pre></div>';
}
return $attach_id;
}
答案 1 :(得分:1)
我有一个类似的问题,其中缺少mime类型。由于我只使用一种mime类型,因此由
修复'post_mime_type' => 'image/jpeg'
之后,它仍然没有更新元数据,而是用&#34; wp_update_attachment_metadata&#34;强制更新。解决了这个问题:
$attach_data = wp_generate_attachment_metadata($attach_id, $file_path);
wp_update_attachment_metadata($attach_id, $attach_data);
答案 2 :(得分:0)
我知道这个话题很旧,但我遇到了类似的问题,对我有用的是在“设置”>>“媒体”下启用将缩略图裁剪到精确尺寸(通常缩略图是成比例的)。顺便说一下,我正在使用 media_handle_sideload() 函数。