正则

//身份证号码
$str = "/^(\d{6})+(\d{4})+(\d{2})+(\d{2})+(\d{3})([0-9]|X)$/";
//护照  
$str = "/^1[45][0-9]{7}|([P|p|S|s]\d{7})|([S|s|G|g]\d{8})|([Gg|Tt|Ss|Ll|Qq|Dd|Aa|Ff]\d{8})|([H|h|M|m]\d{8，10})$/";
//回乡证号码       
$str = "/(H|M)(\d{10})$/";