Php排序

$arrs = [
            1 => '苹果',
            4 => '梨子',
            3 => '香蕉',
            2 => '哈密瓜'
        ];
        $arrs[0] = '草莓';
        print_r($arrs);//结果Array ( [1] => 苹果 [4] => 梨子 [3] => 香蕉 [2] => 哈密瓜 [0] => 草莓 )
        echo '<br/>';
        ksort($arrs);//按照键排序重新排序，
        print_r($arrs);//结果Array ( [0] => 草莓 [1] => 苹果 [2] => 哈密瓜 [3] => 香蕉 [4] => 梨子 )
        asort($arrs);//按照键值排序重新排序，
        echo '<br/>';//结果Array ( [2] => 哈密瓜 [4] => 梨子 [1] => 苹果 [0] => 草莓 [3] => 香蕉 )
        print_r($arrs);