Add comma between foreach looped items but not at end - php

Question

I'd like to achieve on adding a comma between my authors in my foreach but each time I make any references, it adds a comma at the end also.
Here is what I have below:
<div class="four-sixths first">
<img class="mb-20" src="<?= $recipe->get_thumbnail() ?>" alt=""/>
<h2 class="mb-5"><?= $recipe->get_title() ?></h2>
<span><?= $recipe->get_date() ?></span> -
<?php foreach ($recipe->get_authors() as $profile): ?>
<?= $profile->get_name() ?>,
<?php endforeach; ?>
<p><?= $recipe->get_content() ?></p>
</div>
Which gives me the following results:
How can I prevent a comma at the end?

Answer 1

Since you were skeptical about implode, here's a simple example (just showing the loop):
<?php foreach ($recipe->get_authors() as $profile):
$links[] = '' . $profile->get_name() . '';
endforeach; ?>
<?= implode(', ', $links); ?>

Answer 2

An alternative using join:
<div class="four-sixths first">
<img class="mb-20" src="<?= $recipe->get_thumbnail() ?>" alt=""/>
<h2 class="mb-5"><?= $recipe->get_title() ?></h2>
<span><?= $recipe->get_date() ?></span> - <?= join(", ", array_map(function ($profile) { return sprintf('%s', $profile->get_url(), $profile->get_name()); }, $recipe->get_authors())) ?>
<p><?= $recipe->get_content() ?></p>
</div>

Answer 3

Wasn't able to test it but basically store results to $authors first, and in this way you can count it without recalling the method get_authors. While $cnt keeps track base 1 and can be compared directly on the length.
<?php
$authors = $recipe->get_authors();
$cnt = 0;
?>
<div class="four-sixths first">
<img class="mb-20" src="<?= $recipe->get_thumbnail() ?>" alt=""/>
<h2 class="mb-5"><?= $recipe->get_title() ?></h2>
<span><?= $recipe->get_date() ?></span> -
<?php foreach ($authors as $profile) { $cnt++; ?>
<?= $profile->get_name() ?><?php
if ($cnt < count($authors)) echo ",";
?>
<?php } ?>
<p><?= $recipe->get_content() ?></p>
</div>