get( 'json-upload', false ) ) { $this->enableJsonUpload(); } } public function addJsonMimeType($mimes) { $mimes['json'] = 'application/json'; return $mimes; } public function enableJsonUpload() { add_filter('upload_mimes', [$this,'addJsonMimeType']); } public function disableJsonUpload() { remove_filter('upload_mimes', [$this,'addJsonMimeType']); } }