Remove comma on last item of foreach - php

Question

I have next code for WordPress loop of tags for single post:
<?php if ($tags) : foreach($tags as $tag): ?>
<a href="<?php echo get_tag_link($tag); ?>">
<?php echo $tag->name; ?>
</a>,
<?php endforeach; endif; ?>
I have comma added to last anchor. There is also white space after comma.
How can I remove the comma from last anchor while I am doing this with foreach() PHP loop?
Thanks for ideas and help!

Answer 1

Check if your loop is working on the last one:
<?php if ($tags) : ?>
<?php $count = count($tags); ?>
<?php foreach($tags as $i => $tag): ?>
<a href="<?php echo get_tag_link($tag); ?>">
<?php echo $tag->name; ?>
</a>
<?php if ($i < $count - 1) echo ", "; ?>
<?php endforeach; ?>
<?php endif; ?>

Answer 2

What has a higher cost, calling a function or setting a variable? Here's another way to do it perhaps, which sets a variable and removes the offending chars at the end - no extra math or if checks needed.
<?php
$tagoutput = '';
if ($tags) {
foreach ($tags as $tag)
$tagoutput .= '' . $tag->name . ', ';
$tagoutput = rtrim($tagoutput, ', ');
}
echo $tagoutput;
?>

Answer 3

You can do it the other way around (remove it from the first one). If your array is numeric you can try something like this:
<?php if ($tags): ?>
<?php foreach ($tags as $key => $tag): ?>
<?php if ($key > 0): ?>,<?php endif ?>
<a href="<?php echo get_tag_link($tag); ?>">
<?php echo $tag->name; ?>
</a>
<?php endforeach ?>
<?php endif ?>

Answer 4

You can also try it using counter.
$values = array('value','value','value');
$count = count($values);
$i = 0;
foreach($values as $value){
$i++;
echo $value;
if($count > $i){
echo ', ';
}
}
Output: value, value, value