Hello,

I am trying to upload image from frontend and once form submitted, I need to save that image as an “Featured Image” for that post.

$upload_dir = wp_upload_dir(); // Set upload folder
                    $upload = wp_upload_bits($edit_doc_image, null, file_get_contents($edit_doc_image));
                    $filename = $upload['file'];
                    
                    // Check folder permission and define file location
                    if (wp_mkdir_p($upload_dir['path'])) {
                        $file = $upload_dir['path'] . '/' . $filename;
                    } else {
                        $file = $upload_dir['basedir'] . '/' . $filename;
                    }
                    $image_data = file_get_contents($upload['url']);
                    // Create the image file on the server.
                    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, $filename, $pid);

                    require_once(ABSPATH . 'wp-admin/includes/image.php');
                    $attach_data = wp_generate_attachment_metadata($attach_id, $filename);
                    wp_update_attachment_metadata($attach_id, $attach_data);
                    $image = set_post_thumbnail($pid, $attach_id);

Here images are getting uploaded in uploads/2018/08 folder but size displays as 0 bytes. When checked for file type, in folder, it displays as plain text. Even I checked for file type to pass it in post_mime_type, it shows proper.

Admin : https://prnt.sc/kh7csr
Folder : https://prnt.sc/kh7fox

Any help in this will be highly appreciated. Thanks in advance.