Created
April 14, 2017 12:25
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使用遠端圖片連結建立文章特色圖片(thumbnail)
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<?php | |
//functions.php | |
function mxp_set_remote_image_to_post_thumbnail($post_id) { | |
$link = get_post_meta($post_id, 'mxp-remote-image', true); | |
if (filter_var($link, FILTER_VALIDATE_URL) === FALSE) { | |
return false; | |
} | |
if (!has_post_thumbnail($post_id)) { | |
require_once ABSPATH . 'wp-admin/includes/media.php'; | |
require_once ABSPATH . 'wp-admin/includes/file.php'; | |
require_once ABSPATH . 'wp-admin/includes/image.php'; | |
$filename = basename(parse_url($link, PHP_URL_PATH)); | |
$upload_file = wp_upload_bits($filename, null, file_get_contents($link)); | |
if (!$upload_file['error']) { | |
$wp_filetype = wp_check_filetype($filename, null); | |
$attachment = array( | |
'post_mime_type' => $wp_filetype['type'], | |
'post_parent' => $post_id, | |
'post_title' => preg_replace('/\.[^.]+$/', '', $filename), | |
'post_content' => $filename, | |
'post_status' => 'inherit', | |
); | |
$attachment_id = wp_insert_attachment($attachment, $upload_file['file'], $post_id); | |
if (!is_wp_error($attachment_id)) { | |
//產生附加檔案中繼資料 | |
$attachment_data = wp_generate_attachment_metadata($attachment_id, $upload_file['file']); | |
wp_update_attachment_metadata($attachment_id, $attachment_data); | |
//將圖像的附加檔案設為特色圖片 | |
$type = explode("/", $wp_filetype['type']); | |
if ($type[0] == 'image') { | |
set_post_thumbnail($post_id, $attachment_id); | |
} | |
} | |
} | |
return $attachment_id; | |
} else { | |
return false; | |
} | |
} | |
add_action('save_post', 'mxp_set_remote_image_to_post_thumbnail', 10, 1); |
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