function upload_flag($id)
{
$result = false;
$validated = !empty($_FILES['icl_edit_languages']['tmp_name'][$id]['flag_file']);
if ($validated) {
$filename = basename($_FILES['icl_edit_languages']['name'][$id]['flag_file']);
$target_path = $this->upload_dir . '/' . $filename;
$wpml_wp_api = new WPML_WP_API();
$mime = $wpml_wp_api->get_file_mime_type($_FILES['icl_edit_languages']['tmp_name'][$id]['flag_file']);
$allowed_mime_types = array_values($this->allowed_flag_mime_types);
$validated = in_array($mime, $allowed_mime_types, true);
if ($validated && move_uploaded_file($_FILES['icl_edit_languages']['tmp_name'][$id]['flag_file'], $target_path)) {
if (function_exists('wp_get_image_editor') && 'image/svg+xml' !== $mime) {
$image = wp_get_image_editor($target_path);
if (!is_wp_error($image)) {
$image->resize(18, 12, true);
$image->save($target_path);
}
}
$result = $filename;
}
}
if (!$validated) {
$error_message = __('There was an error uploading the file, please try again!', 'sitepress');
if (!empty($_FILES['icl_edit_languages']['error'][$id]['flag_file'])) {
switch ($_FILES['icl_edit_languages']['error'][$id]['flag_file']) {
case UPLOAD_ERR_INI_SIZE:
$error_message = __('The uploaded file exceeds the upload_max_filesize directive in php.ini.', 'sitepress');
break;
case UPLOAD_ERR_FORM_SIZE:
$error_message = sprintf(__('The uploaded file exceeds %s bytes.', 'sitepress'), $this->max_file_size);
break;
case UPLOAD_ERR_PARTIAL:
$error_message = __('The uploaded file was only partially uploaded.', 'sitepress');
break;
case UPLOAD_ERR_NO_FILE:
$error_message = __('No file was uploaded.', 'sitepress');
break;
case UPLOAD_ERR_NO_TMP_DIR:
$error_message = __('Missing a temporary folder.', 'sitepress');
break;
case UPLOAD_ERR_CANT_WRITE:
$error_message = __('Failed to write file to disk.', 'sitepress');
break;
case UPLOAD_ERR_EXTENSION:
$error_message = __('A PHP extension stopped the file upload. PHP does not provide a way to ascertain which extension caused the file upload to stop; examining the list of loaded extensions with phpinfo() may help.', 'sitepress');
break;
}
}
$this->error($error_message);
}
return $result;
}
