how do I replace certain characters in a string?
<p>Suppose I have a string like this</p>

<pre><code>SOMETHING [1000137c] SOMETHING = John Rogers III [SOMETHING] SOMETHING ELSE
</code></pre>

<p>and I need to turn it into this</p>

<pre><code>SOMETHING [1000137c] SOMETHING = John_Rogers_III [SOMETHING] SOMETHING ELSE
</code></pre>

<p>Therefor I need to replace spaces with "_" between words after "[1000137c] SOMETHING = " and before " [". How can I do that in php?</p>

<p>Thanks!</p>
