数组题

<?php 
header('Content-Type:text/html;charset=utf-8');
$arr1 = array(
	'班级1' =>array('a','b','c') , 
	'班级2' =>array('d','e','f') 
	);
$arr2=array(
	'a'=>15,
	'b'=>16,
	'c'=>15,
	'd'=>17,
	'e'=>15,
	'f'=>14
	);
$result=array();
foreach ($arr1 as $class => $userlist) {
			 
	foreach ($userlist as $user ) {
		if ($arr2[$user]==15) {
			$result[] = array(
				'name' =>"$user" ,
				'class' =>"$class" 
			 );
		}
	}
}
print_r($result);
 ?>