Gary Tay

In response to my good friend’s post :

http://www.yoman.com.sg/2007/5/29/validates_nric_of

I present to you the same codes written in PHP

$nric = $_GET[nric];

if(is_NRIC($nric))
{echo "Correct NRIC";}
else
{echo "Your NRIC is wrong";}

function is_NRIC($nric)
{
	if(strlen($nric)==9)
	{
		$nric = strtoupper($nric);
		$prefix = substr($nric,0,1);
		$postfix = substr($nric,8,1);
		$ic_number = substr($nric,1,7);

		$weight = array(2,7,6,5,4,3,2);
		$lookup[S] = array(J,Z,I,H,G,F,E,D,C,B,A);
		$lookup[T] = array(G,F,E,D,C,B,A,J,Z,I,H);
		$lookup[F] = array(X,W,U,T,R,Q,P,N,M,L,K);
		$lookup[G] = array(R,Q,P,N,M,L,K,X,W,U,T);

		for($i=0;$weight[$i];$i++)
		{
		$num+=substr($ic_number,$i,1)*$weight[$i];
		}

		$num %= 11;

		if($lookup[$prefix][$num]==$postfix)
		{
			return true;
		}else
		{
			return false;
		}

	}

}