PHP 从 <a> 标签中提取链接
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PHP extract link from <a> tag
提问by 5et
Possible Duplicate:
PHP String Manipulation: Extract hrefs
可能的重复：
PHP 字符串操作：提取 hrefs
I am using php and have string with content =
我正在使用 php 并且有包含内容的字符串 =
<a href="www.something.com">Click here</a>
<a href="www.something.com">Click here</a>
I need to get rid of everything except "www.something.com" I assume this can be done with regular expressions. Any help is appreciated! Thank you
我需要摆脱除“www.something.com”之外的所有内容，我认为这可以用正则表达式来完成。任何帮助表示赞赏！谢谢
回答by mfonda
This is very easy to do using SimpleXML:
使用 SimpleXML 很容易做到这一点：
$a = new SimpleXMLElement('<a href="www.something.com">Click here</a>');
echo $a['href']; // will echo www.something.com
回答by Tails
Give this a whirl:
试一试：
$link = '<a href="www.something.com">Click here</a>';
preg_match_all('/<a[^>]+href=([\'"])(?<href>.+?)[^>]*>/i', $link, $result);
if (!empty($result)) {
# Found a link.
echo $result['href'][0];
}
Result: www.something.com
结果： www.something.com
Updated: Now requires the quoting style to match, addressing the comment below.
更新：现在需要引用样式匹配，解决下面的评论。
回答by anubhava
I would suggest following code for this:
为此，我建议使用以下代码：
$str = '<a href="www.something.com">Click here</a>';
preg_match('/href=(["\'])([^]*)/i', $str, $m);
echo $m[2] . "\n";
OUTPUT
输出
www.something.com
This will take care of both single quote 'and double quote "in the href link.
这将处理href 链接中的单引号'和双引号"。
回答by John Poulin
Assuming that is ALWAYSthe format of the variable, below should do the trick. If the content may not be a link, this won't work. Essentially it looks for data enclosed within two quotations.
假设这总是变量的格式，下面应该可以解决问题。如果内容可能不是链接，这将不起作用。本质上，它查找包含在两个引号内的数据。
<?php
$string = '<a href="www.something.com">Click here</a>';
$pattern = '/"[a-zA-Z0-9.\/\-\?\&]*"/';
preg_match($pattern, $string, $matches);
print_r($matches);
?>
回答by hakre
As probably you didn't meant your question that easy, but this does exactly what you're asking for:
可能您的问题并不是那么简单，但这正是您所要求的：
$link = '<a href="www.something.com">Click here</a>';
$href = substr($link, 9, -16);
$hrefis:
$href是：
string(17) "www.something.com"
As a regular expression it can be expressed it as this is:
作为正则表达式，它可以表示为：
$href = preg_match('(^<a href="([^"]*)">Click here</a>$)', $link, $matches) ? $matches[1] : die('Invalid input data.');
Is this helpful?
这有帮助吗？
