请教一个正则问题这么写问什么匹配不对
<?php $str = file_get_contents("http://mil.news.sina.com.cn"); // 军情热点 $reg = '#【军情热点】.*<a.*href="(.*).*>(.*)</a>"#iUs'; preg_match_all($reg,$str,$m); echo "<pre class="brush:php;toolbar:false">"; print_r($m);?>
请教一下 匹配一下链接和标题 这么写为什么不对
回复讨论(解决方案)
查看源码去看看哪里有区别
他的编码是 gb2312 的,你的呢?
他的编码是 gb2312 的,你的呢?
我把php的编码也改成了gb2312的 匹配结果Array
(
[0] => Array
(
)
[1] => Array
(
)
[2] => Array
(
)
)
也是空,匹配不到军情热点的所有新闻
请大家帮帮忙
$str = file_get_contents("http://mil.news.sina.com.cn");// 军情热点$reg = '#【军情热点】.+?href=(\S+)#is';preg_match_all($reg,$str,$m);print_r($m);
(
[0] => Array
(
[0] => 【军情热点】 )
[1] => Array
(
[0] => http://blog.sina.com.cn/s/blog_69710d610101fglf.html?tj=1
)
)
$str = file_get_contents("http://mil.news.sina.com.cn");// 军情热点$reg = '#【军情热点】.+?href=(\S+)#is';preg_match_all($reg,$str,$m);print_r($m);
(
[0] => Array
(
[0] => 【军情热点】 )
[1] => Array
(
[0] => http://blog.sina.com.cn/s/blog_69710d610101fglf.html?tj=1
)
)
在麻烦版主一下,我想匹配的是 从军情热点开始之后的10多条新闻,但是这样写貌似只匹配了一条,我最开始的那个正则可能就错了,
<?php$str = file_get_contents("http://mil.news.sina.com.cn"); $reg = '#(?<=【军情热点】).*<a.+href="(.+)".+>(.+)</a>(?=名家专栏)#isU'; preg_match_all($reg,$str,$m); echo "<pre class="brush:php;toolbar:false">";print_r($m); ?>
我试着这样写了一下 也不对呢 请大家帮忙看一下
<?php$str = file_get_contents("http://mil.news.sina.com.cn"); $reg = '#(?<=【军情热点】).*<a.+href="(.+)".+>(.+)</a>(?=名家专栏)#isU'; preg_match_all($reg,$str,$m); echo "<pre class="brush:php;toolbar:false">";print_r($m); ?>
我试着这样写了一下 也不对呢 请大家帮忙看一下
它的连接不包括引号
$reg = '#(?<=【军情热点】).*
$s_html = file_get_contents("http://mil.news.sina.com.cn");$s_html = iconv('gbk', 'utf-8', $s_html);$s_gd_reg = '#【军情热点】(.*)</ul>#iUs';$a_gd_match = array();preg_match_all($s_gd_reg, $s_html, $a_gd_match);$s_news = $a_gd_match[1][0];$s_news_reg = '#<a\s+href=(.*)\s+.*>(?:<font color=red>)?([^<>]*)(?:</font>)?</a>#iUs';$a_news_match = array();preg_match_all($s_news_reg, $s_news, $a_news_match);print_r($a_news_match);
用了一种比较笨的方法。。
谢谢大家的帮忙
有没有一种方法可以写一次正则,就匹配出所有的新闻呢

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,

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

The enumeration function in PHP8.1 enhances the clarity and type safety of the code by defining named constants. 1) Enumerations can be integers, strings or objects, improving code readability and type safety. 2) Enumeration is based on class and supports object-oriented features such as traversal and reflection. 3) Enumeration can be used for comparison and assignment to ensure type safety. 4) Enumeration supports adding methods to implement complex logic. 5) Strict type checking and error handling can avoid common errors. 6) Enumeration reduces magic value and improves maintainability, but pay attention to performance optimization.

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

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�...

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.
