PHP数组如何从指定位置开始查询

<br>$arr = array("a"=>1, "b"=>2, "c"=>3, "d"=>4, "e"=>5);<br>$index = array_search('c',array_keys($arr));<br>$arr1 = array_slice($arr, $index);<br><br>foreach($arr1 as $key=>$val){<br>
echo $key.'='.$val.'<br>';<br>}<br>