preg_replace 排除 <a href='''></a>PHP [英] preg_replace to exclude <a href='''></a> PHP
问题描述
我使用 preg_replace 用 href 标签替换文本中的关键字，我的正则表达式工作得很棒，现在我的代码是:
Im using preg_replace to replace keywords in text with a href tag, my regex is working awesome, right now my code is:
$newstring2 = preg_replace("/\p{L}*?".preg_quote($match[$i])."\p{L}*/ui", "<a href='".$url."' class='link'>$0</a>", $newstring);
唯一的问题是，我需要排除 <a href='https://keyword.cz' title="keyword">keyword</a> 中的任何关键字
Only problem with this is, that I need to exclude any keywords inside <a href='https://keyword.cz' title="keyword">keyword</a>
这是我发现的https://stackoverflow.com/a/22821650/4928816
那么有人可以帮我将这两个正则表达式合并在一起吗?
So is here someone who can help me merge this two regex together?
示例:
$text = 'this is sample text about something what is text.'
$keyword = 'text'
现在感谢我的正则表达式:
Now thanks to my regex I get:
$text= 'this is sample <a href='somelink.php'>text</a> about something what is <a href='somelink.php'>text</a>.'
但是如果文本是:
$text= 'this is sample <a href='text.php'>text</a> about something what is <a href='somelink.php'>text</a>.'
这就是例如我得到的:
$text= 'this is sample <a href='<a href='somelink.php'>text.php</a>'><a href='somelink.php'>text</a></a> about something what is <a href='somelink.php'><a href='somelink.php'>text</a></a>.'
更新:为什么我需要这个.致力于在充满标签的特定博客文章中用特定 URL 替换所有关键字的功能.例如如果
Update: Why do I need this. Working on function to replace all keywords with specific URL in specific blog post full of tags.. For examle if
$keyword = 'key';
我需要找到并用 href 标签替换整个世界，例如:Key、Keyword、keyword、keylock、mykey、keys 或 Key、Keyword，支持 UNICODE
I need to find and replace full world with a href tag, for example: Key, Keyword, keyword, keylock, mykey, keys or also KeY, Keyword with UNICODE support
推荐答案
如果必须使用正则表达式，我认为 PCRE 动词是您的最佳选择.排除所有链接，然后搜索具有单词边界的术语.
If it must be done with regex I think PCRE verbs are your best option. Exclude all links then search for the term with word boundaries.
<a[\S\s]+?<\/a>(*SKIP)(*FAIL)|\bTERM\b
演示:https://regex101.com/r/KlE1kc/1/
这个缺陷的一个例子是 a 是否曾经有一个 .例如onclick='write("</a>")' 解析器确实是最好的方法.HTML 和正则表达式有很多问题.
an example of a flaw with this though is if the a ever had a </a> in it. e.g. onclick='write("</a>")' a parser is really the best approach. There are a lot of gotchas with HTML and regexs.
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