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POMaking a regex with a lookbehind
 

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    <p>I have a regex that replaces the usual hyphen with the non-break hyphen, if it’s found inside of a <em>word</em> </p> <pre><code>preg_replace('@(?&lt;= \w)-(?= \w)@xu','‑',$string); </code></pre> <p>But there are strings like <code>"this is a link":http://example.com/funny-stuff-is-funny</code>, which are get parsed too. The problem is further parsing such string breaks because of the non-break hyphen inside of the link. So I need or to modify the original regex to not match links, or to cover the whole function in another where I will fix that behavior. The first way I tried to go ended at this</p> <pre><code>'@((?&lt;! http)[/\pL\pP]+\w)-(?= \w)@xu' </code></pre> <p>It matches <code>link":http://example.com/funny-</code> and still replaces the hyphen. So I went the second way and get the following thing:</p> <pre><code>preg_replace( /* Fixing broken links with NON-BREAKING HYPHEN */ '@(https?\://[^\s]+)‑@', '$1===-===', /* This is to make a better view */ preg_replace( /* NON-BREAKING HYPHEN inside of a word */ '@(?&lt;= \w)-(?= \w)@xu', '‑', $string)))); </code></pre> <p>And with this we can have replaced hyphen in links. A single one hyphen:</p> <pre><code>"this is a link":http://example.com/funny-things-are===-===funny </code></pre> <p>I’ve tried to change ‘greediness’ of the covering expression with <code>‘U’</code> but it doesn’t seem to fix it, so I’m asking for help.</p> <p><strong>===upd===</strong></p> <p>I accepted solution with <code>preg_replace_callback()</code> as a general idea, but I had to use <code>preg_replace()</code> inside of it because of multibyte encoding.</p>
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    1. COwhat about bad urls that have unencoded spaces in them?
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    2. COCannot be there.
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