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Home Backend Development PHP Tutorial 请教一个正则问题这么写问什么匹配不对

请教一个正则问题这么写问什么匹配不对

Jun 23, 2016 pm 02:18 PM

<?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);?>
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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);
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Array
(
[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);
Copy after login
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Array
(
[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); ?>
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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); ?>
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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】).*(.+)
(?=名家专栏)#isU';

$s_html = file_get_contents("http://mil.news.sina.com.cn");$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);
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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

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