PHP 验证整数或小数二位的正则

// $accountPrice = $_GET["num"];
// $accountPrice = 111;
// $accountPrice = 1112.;
// $accountPrice = 2324.1;
// $accountPrice = 2324.15;
// $accountPrice = 2324.157;//wrong
// $accountPrice = 0.57;


if (preg_match("/^[0-9]+(.[0-9]{1,2})?$/", $accountPrice)) {
	echo "整数或小数二位的正则";
}else{
    echo "错";
}