Print out elements in an alternating fashion from two arrays

gistfile1.php

<?php
// Sample arrays
$dribbble = array("dribbble item 1", "dribbble item 2", "dribbble item 3");
$instagram = array("instagram 1", "instagram 2", "instagram 3", "instagram 4", "instagram 5");

// Determine maximum size to iterate to
$maxSize = max(count($dribbble), count($instagram));


for ($i = 0; $i < $maxSize; $i++) {
    // Check that attempting to access from the dribbble array is not out of 
    // bounds
    if (count($dribbble) > $i) {
        // Print out the list item HTML
        echo sprintf("<li>%s</li>\n", $dribbble[$i]);
    }

    // Check that attempting to access from the instagram array is not out of 
    // bounds
    if (count($instagram) > $i) {
        // Print out the list item HTML
        echo sprintf("<li>%s</li>\n", $instagram[$i]);
    }
}
?>