在PHP中使用正则表达式捕获时如何忽略字符串中的单词？

Question

Here is what my code looks like:

preg_replace("/(test)/i", "<strong>$1</strong>", $text);

And here is an example string:

"<a href="www.website.com/search/%23test">#test</a>"

I want to capture the second 'test' but not the first one in the URL.

Answer 1

You can avoid matching something which is inside angular brackets (at least, if there are no literal angular brackets in the text) with a negative lookahead:

preg_replace("/test(?![^<>]*>)/i", "<strong>$0</strong>", $text);

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