Summary of regular expressions for 15/18-digit ID number verification_regular expressions

Need a simple regularexpression for verifying the ID number. I checked a lot from the Internet, but all have problems, so I just wrote one myself. The following article is mainly for Everyone shared the regular expression about 15/18-digit ID number verification. The article introduces it in very detail. Friends who need it can refer to it.

Preface

During the development process, it is often necessary to verify the validity of some input information. It is easiest to use regular expressions for verification. , the most efficient way, let’s take a look at the regular expression for 15/18-digit ID number verification.

Introduction

##xxxxxx yyyy MM dd 375 0 18 digits

xxxxxx yy MM dd 75 0 15 digits

Region:

[1-9]\d{5}

The top two in the year:

(18|19|([23] \d)) 1800-2399

Last two digits of year:

\d{2}

month:

((0[1-9])|(10|11|12))

Number of days:

(([0-2][1-9])|10 |20|30|31) Leap years cannot be prohibited 29+

three-digit sequential code:

\d{3}

two-digit sequential code:

\d{2}

Check code:

[0-9Xx]

##Regular expressionEighteen digits:

^[1-9]\d{5}(18|19|([23]\d))\d{2}((0[1-9 ])|(10|11|12))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$

Fifteen digits:

^[1-9]\d{5}\d{2}((0[1-9])|(10|11|12))(([0-2 ][1-9])|10|20|30|31)\d{2}$

##Total:

( ^[1-9]\d{5}(18|19|([23]\d))\d{2}((0[1-9])|(10|11|12 ))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$)|(^[1-9]\d{5}\ d{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)\d{2}$

)

Simple

JSValidation example

function isCardNo(card) 
{ 
// 身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X 
var reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/; 
if(reg.test(card) === false) 
{ 
alert("身份证输入不合法"); 
return false; 
} 
}

Summary

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