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Editorial Team
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Asked: 2026-05-22T01:21:57+00:00

I’ve got a special case where I am making phrase replacements and I need

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I’ve got a special case where I am making phrase replacements and I need to keep my word boundaries and omit any actions from taking place on my content inside header tags (<h1><h2><h3><h4><h5>).

Here’s what I got so far, and it is saying ignore phrases if they fall after a > or a -, which prevents URLS and Hyperlinks from being edited too. 

preg_replace("/[^\>\.-]\b{$keywords}\b/i"," <a href='$url' target='$target'>$keywords</a>

So the regex needs to :

  1. Honor word boundaries
  2. Ignore phrases within header tags, and hyperlinks.
  3. Treat -(dashes) as a boundary too, which \b does not seem to do.

Any advise?

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1 Answer

  1. Editorial Team

    I found a solution for the header tags with a lookahead. 

    /(?<!_)(?<!-)\b$keywords[$key]\b(?!(.*?)\<\/h\d>)/i

    I tried to find a solution for text in alt and title tags using the look behind feature but could not get it to work without breaking the regex. It seems everytime I used a .+ or a (.*?) in the lookbehind it broke it.

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