Does what it says on the tin, merges three arrays to a looping pattern

pattern_array_merge.php

<?php

$pattern       = array(0,0,0,1,2,2,2);
$news_array    = array('news1','news2','news3','news4','news5','news6','news7','news8');
$video_array   = array('video1','video2','video3','video4','video5','video6','video7','video8');
$photo_array   = array('photo1','photo2','photo3','photo4','photo5','photo6','photo7','photo8','photo9','photo10','photo11','photo12','photo13');

$asset_array   = array($news_array, $video_array, $photo_array);
$type_count    = sizeof($asset_array);
$pattern_count = sizeof($pattern) - 1;
$total_length  = array_total_size($asset_array);

$new_array     = array();

for($i=0;$i<9999;$i++) {
    $pattern_index = $i % $pattern_count;
	$select_index  = $pattern[$pattern_index]; 

	echo $select_index . '<br />';

	if(!empty($asset_array[$select_index])) {
		$new_item = array_shift($asset_array[$select_index]);
		
		if(isset($new_item)) $new_array[] = $new_item;
	}

	if(array_total_size($asset_array) == 0) break;
}

foreach($new_array as $item) {
	echo $item . '<br />';
}


function array_total_size($arr) {
	$count = 0;
 
	foreach($arr as $subarr) {
		$count = $count + sizeof($subarr);
	}

	return $count;
}