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    <p>This question sounds interesting. I don't know <a href="/questions/tagged/php" class="post-tag" title="show questions tagged 'php'" rel="tag">php</a> but I decided to challenge myself to resolve it with <a href="/questions/tagged/python" class="post-tag" title="show questions tagged 'python'" rel="tag">python</a>, that I'm more used to it.</p> <pre><code>import regex s = r"This is an example text to explain the problem I am having with the regular expression" [elem for t in regex.findall(r'\m(?|(((\w{4,})\W+\w{3,})\W+\w{3,})|((\w{4,})\W+\w{3,})|(\w{4,}))', s, overlapped=True) for elem in t if elem != ''] </code></pre> <p>I've used the <code>regex</code> module and its <code>overlapped</code> option that begins next match from the character following the current one. The regular expression returns tuples like:</p> <pre><code>[('This', '', ''), ('example text', 'example', ''), ('text', '', ''), ('explain the problem', 'explain the', 'explain'), ('problem', '', ''), ('having with the', 'having with', 'having'), ('with the regular', 'with the', 'with'), ('regular expression', 'regular', ''), ('expression', '', '')] </code></pre> <p>So from there I do another loop to extract those fields that are not blank, that yields:</p> <pre><code>['This', 'example text', 'example', 'text', 'explain the problem', 'explain the', 'explain', 'problem', 'having with the', 'having with', 'having', 'with the regular', 'with the', 'with', 'regular expression', 'regular', 'expression'] </code></pre>
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    1. PORegex match word groups and parts of previously matched word groups
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    1. COYour implementation is missing the overlapping matches. Compare your result set with the result set in the first post. I Like the clean implementation in Python though.
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    2. CO@riekelt: You are right. I will try harder. Otherwise I will have to delete it.
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    3. CO@riekelt: I've fixed it using another approach.
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