1、简单的正则表达式：
（1）preg_match(
"/^(\d{18,18}|\d{15,15}|\d{17,17}x)$/"
,$id_card)
（2）preg_match(
"/^(\d{6})(18|19|20)?(\d{2})([01]\d)([0123]\d)(\d{3})(\d|X)?$/"
,$id_card)
（3）preg_match("/(^\d{15}$/)|(\d{17}(?:\d|x|X)$/),$id_card)
2、复杂并且严格一些的验证：
function isIdCardNo(num)
{
num = num.toUpperCase();
if
(!(/(^\d{15}$)|(^\d{17}([0-9]|X)$)/.test(num)))
{
alert(
'输入的身份证号长度不对，或者号码不符合规定！\n15位号码应全为数字，18位号码末位可以为数字或X。'
);
return
false
;
}
var len, re;
len = num.length;
if
(len == 15)
{
re =
new
RegExp(/^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/);
var arrSplit = num.match(re);
var dtmBirth =
new
Date(
'19'
+ arrSplit[2] +
'/'
+ arrSplit[3] +
'/'
+ arrSplit[4]);
var bGoodDay;
bGoodDay = (dtmBirth.getYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
if
(!bGoodDay)
{
alert(
'输入的身份证号里出生日期不对！'
);
return
false
;
}
else
{
var arrInt =
new
Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
var arrCh =
new
Array(
'1'
,
'0'
,
'X'
,
'9'
,
'8'
,
'7'
,
'6'
,
'5'
,
'4'
,
'3'
,
'2'
);
var nTemp = 0, i;
num = num.substr(0, 6) +
'19'
+ num.substr(6, num.length - 6);
for
(i = 0; i < 17; i ++)
{
nTemp += num.substr(i, 1) * arrInt[i];
}
num += arrCh[nTemp % 11];
return
num;
}
}
if
(len == 18)
{
re =
new
RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/);
var arrSplit = num.match(re);
var dtmBirth =
new
Date(arrSplit[2] +
"/"
+ arrSplit[3] +
"/"
+ arrSplit[4]);
var bGoodDay;
bGoodDay = (dtmBirth.getFullYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
if
(!bGoodDay)
{
alert(dtmBirth.getYear());
alert(arrSplit[2]);
alert(
'输入的身份证号里出生日期不对！'
);
return
false
;
}
else
{
var valnum;
var arrInt =
new
Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
var arrCh =
new
Array(
'1'
,
'0'
,
'X'
,
'9'
,
'8'
,
'7'
,
'6'
,
'5'
,
'4'
,
'3'
,
'2'
);
var nTemp = 0, i;
for
(i = 0; i < 17; i ++)
{
nTemp += num.substr(i, 1) * arrInt[i];
}
valnum = arrCh[nTemp % 11];
if
(valnum != num.substr(17, 1))
{
alert(
'18位身份证的校验码不正确！应该为：'
+ valnum);
return
false
;
}
return
num;
}
}
return
false
;
}
3、严格的验证：
