สร้างฟังก์ชั่นก์ เลขบัตรประชาชน เบอร์โทรศัพท์

function genNumber($id)
{
	$one=substr($id,0,1);
	$onemore=$one."-";
	$two=substr($id,1,4);
	$twomore=$two."-";
	$three=substr($id,5,5);
	$threemore=$three."-";
	$four=substr($id,10,2);
	$fourmore=$four."-";
	$five=substr($id,12,1);
	$fivemore=$five;
	$oneid=str_replace($one,$onemore,$one);
	$twoid=str_replace($two,$twomore,$two);
	$threeid=str_replace($three,$threemore,$three);
	$fourid=str_replace($four,$fourmore,$four);
	$fiveid=str_replace($five,$fivemore,$five);

	$newid=$oneid.$twoid.$threeid.$fourid.$fiveid;;
	return $newid; //1-5799-01233-42-0
}

<?php
function hyphenize($id)
{
	return strlen($id = preg_replace('/[^\d]+/', '', $id)) === 13
		? preg_replace('/^(\d)(\d{4})(\d{5})(\d{2})(\d)$/', '\1-\2-\3-\4-\5', $id)
		: preg_replace('/^((?(?=02)\d{2}|\d{3}))(\d+)$/', '\1-\2', $id);
}

echo hyphenize('1579901233420'); // 1-5799-01233-42-0
echo hyphenize('0812345678'); // 081-2345678
echo hyphenize('029405555'); // 02-9405555