如何以编程方式将图像上传到wordpress并将其设置为特色图像？

Question

在这里，在这个 functions.php 文件中，我想做的是从我的帖子内容中获取图像，实际上我正在内容中使用 image_url （获取第一张图像的这部分工作正常，我已经测试过它 ） 。问题是我无法使用 url 上传图像并将其设置为特色图像，从而弹出“发布失败”窗口。有人可以帮我吗，或者你有其他方法吗？

function generate_post_featured_image($post_ID) {
$post = get_post($post_ID);

if (empty($post->featured_image)) {
    // Find the first image URL in the post content
    preg_match('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
    if (isset($matches[1])) {
        $image_url = $matches[1];

        // Sideload the image and get the attachment ID
        $attachment_id = media_sideload_image($image_url, $post_ID, null, 'id');

        if (!is_wp_error($attachment_id) && !empty($attachment_id)) {
            // Set the attachment ID as the featured image
            set_post_thumbnail($post_ID, $attachment_id);
        } else {
            $error_message = $attachment_id->get_error_message();
            echo 'Error sideloading image: ' . $error_message;
        }
    }
}
}

add_action('publish_post', 'generate_post_featured_image');

Answer 1

function upload_image_and_set_featured($post_ID) {
    $post = get_post($post_ID);

    if (empty($post->featured_image)) {
        // Find the first image URL in the post content
        preg_match('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
        if (isset($matches[1])) {
            $image_url = $matches[1];

            // Upload the image and get the attachment ID
            $upload_dir = wp_upload_dir();
            $image_data = file_get_contents($image_url);
            $filename = basename($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'
            );
            $attachment_id = wp_insert_attachment($attachment, $file, $post_ID);
            if (!is_wp_error($attachment_id)) {
                require_once(ABSPATH . 'wp-admin/includes/image.php');
                $attachment_data = wp_generate_attachment_metadata($attachment_id, $file);
                wp_update_attachment_metadata($attachment_id, $attachment_data);
                set_post_thumbnail($post_ID, $attachment_id);
            } else {
                $error_message = $attachment_id->get_error_message();
                echo 'Error uploading image: ' . $error_message;
            }
        }
    }
}

add_action('publish_post', 'upload_image_and_set_featured');

将上述代码添加到您的function.php中。此代码从您的内容中获取第一张图像并将其设置在特色图像中。

Answer 2

 if (isset($_FILES['fileToUpload']) && !empty($_FILES['fileToUpload']['name'])) {
            require_once(ABSPATH . 'wp-admin/includes/file.php');
            require_once(ABSPATH . 'wp-admin/includes/media.php');
            require_once(ABSPATH . 'wp-admin/includes/image.php');

            $attachment_id = media_handle_upload('fileToUpload', $post_id);
            if (is_wp_error($attachment_id)) {
                echo 'Error uploading image: ' . $attachment_id->get_error_message();
            } else {
                set_post_thumbnail($post_id, $attachment_id);
            }
        }

        return $post_id ? '<p>Post created successfully!</p>' : '<p>Error creating post!</p>';