Table of Contents
回复讨论(解决方案)
Home Backend Development PHP Tutorial 一个正则表达式的问题,数字的个数写1就可以匹配上,写比1大的就匹配不上了。

一个正则表达式的问题,数字的个数写1就可以匹配上,写比1大的就匹配不上了。

Jun 23, 2016 pm 02:02 PM

正则如下:

$patten='/^[1-9]\d{5}[1-2]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{4}$/';//就是最后这个4
Copy after login


如果把最后那个4改成1,就能匹配的上,改成比1大的就不行了

这个正则是想用来匹配身份证号码的,如果哪位大侠有的话希望能发出来借鉴一下~兼容15位和18位的~


回复讨论(解决方案)

表2.常用的限定符
代码/语法 说明
* 重复零次或更多次
+ 重复一次或更多次
? 重复零次或一次
{n} 重复n次
{n,} 重复n次或更多次
{n,m} 重复n到m次

15位的身份证不知道是怎么排列的,给你点参考

1、身份证号码含义:
一代(现已淘汰,不必判断了)
地区代码(6位)出生年(2位)出生月(2位)出生日(2位)顺号(3位) 共15位
二代
地区代码(6位)出生年(4位)出生月(2位)出生日(2位)顺号(3位)校验位(1位) 共18位
校验位可能是 X
2、简单判定,只需判断位数是否正确即可
/^\d{15}(?:\d{2}[\dX])?$/
3、精确判定(二代)应使用校验码生成算法。各种语言的“身份证校验码生成函数”都可以在网上找到

1、身份证号码含义:
一代(现已淘汰,不必判断了)
地区代码(6位)出生年(2位)出生月(2位)出生日(2位)顺号(3位) 共15位
二代
地区代码(6位)出生年(4位)出生月(2位)出生日(2位)顺号(3位)校验位(1位) 共18位
校验位可能是 X
2、简单判定,只需判断位数是否正确即可
/^\d{15}(?:\d{2}[\dX])?$/
3、精确判定……

	function validateIdNumber($idnumber){		$patten='/^\d{17}$/';		preg_match($patten,$idnumber,$match);		var_dump($match);//为什么这也显示的是FALSE??我16位就可以,加到17就不行了,这到底是什么问题啊???	}	validateidnumber(22111111111234563);
Copy after login

validateidnumber(  "22111111111234563 " );

用字符串,数值的话就越界了
本来身份证号就应该是字符串

引用 2 楼 xuzuning 的回复:1、身份证号码含义:
一代(现已淘汰,不必判断了)
地区代码(6位)出生年(2位)出生月(2位)出生日(2位)顺号(3位) 共15位
二代
地区代码(6位)出生年(4位)出生月(2位)出生日(2位)顺号(3位)校验位(1位) 共18位
校验位可能是 X
2、简单判定,只需判断位数是否正确即可
/^\d{15}(?:\d……

好吧,我知道问题出在哪了,因为超过16位了以后数字就会变成科学计数方式,所以16位以上的就不是原来的数字了

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Describe the SOLID principles and how they apply to PHP development. Describe the SOLID principles and how they apply to PHP development. Apr 03, 2025 am 12:04 AM

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to automatically set permissions of unixsocket after system restart? How to automatically set permissions of unixsocket after system restart? Mar 31, 2025 pm 11:54 PM

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

How to debug CLI mode in PHPStorm? How to debug CLI mode in PHPStorm? Apr 01, 2025 pm 02:57 PM

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

Explain the concept of late static binding in PHP. Explain the concept of late static binding in PHP. Mar 21, 2025 pm 01:33 PM

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

How to send a POST request containing JSON data using PHP's cURL library? How to send a POST request containing JSON data using PHP's cURL library? Apr 01, 2025 pm 03:12 PM

Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

See all articles