How do I remove a trailing "comma" from my PHP for each function?

I have a working piece of PHP code which iterates a number of comma-separated values.
What I am having a difficult time doing is removing the trailing comma at the end of the last item found.

<?php foreach($vendor_cat as $vendorcat) { ?>
    <span id="vendor_category_list"><a href="<?php echo $vendorcat['href']; ?>" ><?php echo $vendorcat['category_name']; ?></a>,</span>
<?php } ?>

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any help would be greatly apprecaited.

thanks in advance
badwolfffAsked:
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Dave BaldwinFixer of ProblemsCommented:
Your first problem is that ,</span> is not part of a PHP string but part of the HTML content which PHP doesn't even see.
badwolfffAuthor Commented:
Hi,

thanks. Could the function not be rewritten to count the number of items for that loop and add that many -1 commas?

I've done similar stuff in JavaScript but in PHP I am not sure how to do it.

thanks
Dave BaldwinFixer of ProblemsCommented:
PHP doesn't touch the HTML that is in between the PHP tags.  You have to put all of that in a PHP string for PHP to do anything with it.  If you do that then you can replace the final instance with a version that does not have the comma.
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badwolfffAuthor Commented:
Ok
Could you help me with the code?
thanks
badwolfffAuthor Commented:
In the meantime I was able to get an iteration count inside the for each function using:
<?php echo count($vendor_cat); ?>
Dave BaldwinFixer of ProblemsCommented:
That doesn't help as long as the data is not in a PHP string.  This is untested but it is the basic idea.  You create the whole string in a PHP variable and then replace the last part.
<?php 
$thestring = '';
foreach($vendor_cat as $vendorcat) { 
	$thestring .= '<span id="vendor_category_list"><a href="'.$vendorcat['href'].'" >'.$vendorcat['category_name'].'</a>,</span>'
}
$thestring = substr_replace($thestring, '</span>', -8, 8) // http://php.net/manual/en/function.substr-replace.php
?>

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Ray PaseurCommented:
In case you're new to PHP and want to learn the language, this article has some helpful links.
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_11769-And-by-the-way-I-am-new-to-PHP.html
badwolfffAuthor Commented:
Thanks Ray, trying to fix someone else's code. Mostly I can manage myself but sometimes there are these awkward problems.

Dave by the way after your function the out is empty now.
Dave BaldwinFixer of ProblemsCommented:
I forgot to add...
echo $thestring;

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at the very end.

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