我正在寫一個Wordpress插件來在我的博客上下載遠程圖像。wp_generate_attachment_metadata返回一個空的數組
我做了一個函數,在本地上傳一個遠程鏡像,然後返回它的ID。 一切似乎都OK,只是
$attach_data = wp_generate_attachment_metadata($attach_id, $local_file);
返回我一個空數組 - 它不應該。
wp_generate_attachment_metadata等等,負責生成上傳圖像的縮略圖。但是當我運行我的代碼時,我沒有創建縮略圖。
我檢查了我發送給函數的值,它們似乎是正確的:我有一個ID和上載文件的絕對路徑,如代碼中所述。 不過,我不能管理有我的代碼工作:
$ attach_data不能爲空...
誰能幫助?
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;
}
順便說一句,如果任何WP狗肉湯有什麼話要說這段代碼...我會很樂意閱讀它,因爲有關上傳文件的WP文檔是有點亂。我需要一些特定的東西,因爲能夠檢索文件擴展名。我結束了這個,但也許你有一些更好的想法!
這是否也爲PDF創建縮略圖,對我來說,我的代碼是爲圖像創建縮略圖,但不是用於pdf或rar或zip文件? –