php验证*身份证号码是否合法

1. [代码][PHP]代码

/**
	驗證台灣身份證號碼
	参数:
		身份證號碼
	返回:
		布爾值
	用法:
		echo '<pre>',var_dump(Fun::twcod('n2......10')),'</pre>';
/**/
public static function twcod($id) {
	$id=strtoupper($id);
	$d1=substr($id,0,1);
	if(strlen($id)!=10) {return FALSE;}
	if(stristr('ABCDEFGHJKLMNPQRSTUVXYWZIO',$d1)===FALSE) {return FALSE;}
	if(substr($id,1,1)!='1' && substr($id,1,1)!='2') {return FALSE;}
	if(!is_numeric(substr($id,1,9))) {return FALSE;}

	$num=array(
		'A'=>'10','B'=>'11','C'=>'12','D'=>'13','E'=>'14','F'=>'15','G'=>'16','H'=>'17','J'=>'18','K'=>'19','L'=>'20','M'=>'21','N'=>'22',
		'P'=>'23','Q'=>'24','R'=>'25','S'=>'26','T'=>'27','U'=>'28','V'=>'29','X'=>'30','Y'=>'31','W'=>'32','Z'=>'33','I'=>'34','O'=>'35',
	);
	$n1=substr($num[$d1],0,1)+(substr($num[$d1],1,1)*9);
	unset($num,$d1);
	$n2=0;
	for($j=1;$j<9;$j++) {
		$d4=substr($id,$j,1);
		$n2=$n2+$d4*(9-$j);
	}
	$n3=$n1+$n2+substr($id,9,1);
	if(($n3 % 10)!=0){return FALSE;}
	return TRUE;
}