PHP, Echoing an array into a string of comma seperated values
<p>I have a multi select box i am using to allow users to select multpile users, this is fine but the $_POST output is an array.</p>

<p>How would i get these values to be formatted like so</p>

<pre><code>100,200,300,400
</code></pre>

<p>So i need to echo out the values, add a comma, but dont add the comma for the last value</p>

<p>Any help would be grand.</p>

<p>Cheers</p>
