private function diff($x, $y)
{
$html = "<style>\n \t\t.diffInserted{\n \t\t\tborder: 1px solid rgb(192,255,192);\n \t\t\tbackground: rgb(224,255,224);\n \t\t}\n \t\t.diffDeleted{\n \t\t\tborder: 1px solid rgb(255,192,192);\n \t\t\tbackground: rgb(255,224,224);\n \t\t}\n \t</style>";
return $html . Diff::toTable(Diff::compare($x, $y));
}
