一个正则的问题
$string='dj%a3%a3999';if(preg_match('/^[dj]{2}([(\%23)(\%a3\%a3)])((\w)+)$/i', $string,$result)){ print_r($result);}
匹配不上,有什么好的解决方案。
回复讨论(解决方案)
你最好讲一下你的需求吧,中间那段看你的正则很乱。
/*需求就是dj一个分组%a3%a3 或者%23 是另外一个分组999是一个分组通过$result获取对应的数据。如:*/$result[0]='dj';$result[1]='%a3%a3';$result[2]='999';
$s = 'dj%a3%a3999';preg_match('/([^%]+)((?:%a3|23)+)(.+)/', $s, $r);print_r($r);
使用了这个:
$string='dj%a3%a3999';if(preg_match('/^([dj]{2})([%a3]+)(\d{3})$/i', $string,$result)){ print_r($result);}
结果:
Array ( [0] => dj%a3%a3999 [1] => dj [2] => %a3%a3 [3] => 999 )
$s = 'dj%a3%a3999';preg_match('/([^%]+)((?:%a3|23)+)(.+)/', $s, $r);print_r($r);
如果$s = 'dj%23999';则不行。
使用了这个:
$string='dj%a3%a3999';if(preg_match('/^([dj]{2})([%a3]+)(\d{3})$/i', $string,$result)){ print_r($result);}
[/code]
这个串也需要匹配的:$string='dj%23999';
$s = 'dj%23999';
preg_match('/([^%]+)((?:%(?:a3|23))+)(.+)/', $s, $r);
或
preg_match('/([^%]+)((?:%a3|%23)+)(.+)/', $s, $r);
正则表达式规则说明中有:
| 运算时如果发生歧义,则需要逐个开列或用括号括起来
显然 (?:%a3|23) 中 % 被结合到了 a3 从而发生了歧义
老大,能不能帮我解释下,我看到有很多的正则前面都加?:我想知道这个有什么意义?
(?:...) 与 (...) 分组作用一样,但结果不出现结果集中
(?:...) 与 (...) 分组作用一样,但结果不出现结果集中
老大,能不能帮我匹配个地址,如:
www.sohu.com,www.baidu.com,www.yahoo.com.n
这样连着的网址最多为9个,其中也可以匹配sohu.com,baidu.com,yahoo.com.cn
(?!(w))(\w+(-\w+)*)(\.(\w+(-\w+)*))*

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

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

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



Alipay PHP...

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,

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 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...

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

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.

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�...
