Show a number of modules form a larger number of modules randomly

gistfile1.php

<?php 
$modlist=array('modpos01','modpos02','modpos03','modpos04','modpos05');
$allMods=count($modlist);
$show=array();
$elephantInCairo=0;
while(count($show) < 4 && $elephantInCairo < 100)
{
	$c = rand (0 , $allMods-1);
	
	if (!in_array($modlist[$c], $show))
	{
		if ($this->countModules($modlist[$c]))
		{
			$show[] = $modlist[$c];
		}
	}
	$elephantInCairo++;
}

?>

<?php if (count($show)): ?>
	<section id="mymodulerow">
		<div class="container">
			<h3>My Module Row</h3>
			<div class="row">
				<?php foreach($show as $m) : ?>
					<div class="col-md-3">
						<jdoc:include type="modules" name="<?php echo $m; ?>" style="xhtml" />
					</div>
				<?php endforeach; ?>
			</div>
		</div>
	</section>
<?php endif; ?>

Why not simply do:

<?php
$modlist=array('modpos01','modpos02','modpos03','modpos04','modpos05');
$show = array_rand($modlist, 4);
?>

because I can :-)