What are the regular writing methods for 15/18-digit ID number verification?

This time I will bring you what are the regular writing methods for 15/18-digit ID card number verification, what are the precautions, and the following are practical cases, one Get up and take a look.

Preface

During the development process, it is often necessary to verify the validity of some input information, using regular expressions Verification is the simplest and 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 The last two digits of the year

:

\d{2}

Month:

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

([[0-2] [1-9]) | 10 | 20 | 30 | 31)

不Forbidden 29+ Three-digit sequence code:

\d{3}

Two-digit sequence 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]$

Fifteenth digit:

^[ 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 JS verification 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; 
} 
}

I believe you have mastered the method after reading the case in this article, please pay attention for more exciting things Other related articles on php Chinese website!

Recommended reading:

Analysis of the principles and syntax of JS regularity

Pictures of using regular multi-line mode and single-line mode Detailed text explanation

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