求大神解决下php数组循环的问题

<?php$arr = array(1,2,3,4,5,6,7,8);for($i=0; $i<count($arr); $i+=4){	$temp = array_slice($arr, $i, 4);	for($k=1; $k<=2; $k++){		echo 'start'.$k.'<br>';		foreach ($temp as $val) {			echo $val.'<br>';		}		echo 'end'.$k.'<br>';	}}

$arr = array(1,2,3,4,5,6,7,8);$n = 2; // 循环2次$split = 4; // 4个为一个分组echo '<pre class="brush:php;toolbar:false">';response($arr, $n, $split);echo '

start11234end1start21234end2----------------------------------------------------------start15678end1start25678end2