Get only the next 6 characters after a word
<p>I have this string:</p>

<p><code>$string = 'foo bar php haystack needle'</code></p>

<p>And i want to get the next 6 characters after <code>php</code> , so i would get:</p>

<p><code>haysta</code></p>

<p>How can i do that?</p>

<p>Greetings</p>
