php数组筛选问题

Question

把下面数组lastgas不为空的字段筛选出来，组成新数组
如图 只保留dataenddate不为空的数据
Array
(
    [paygasRecord] => Array
        (
            [0] => Array
                (
                    [gasHead] => Array
                        (
                            [dataenddate] => 2018-07
                            [lastgas] => Array
                                (
                                )                            [curgas] => Array
                                (
                                )                            [actchargegas] => Array
                                (
                                )                            [gasmonthcost] => Array
                                (
                                )                            [gascost] => Array
                                (
                                )                            [flatefee] => Array
                                (
                                )                            [keepmoney] => .01
                            [chargemoney] => 0.01
                            [bankcode] => Array
                                (
                                )                            [chargemethod] => 微信
                            [chargetime] => 2018-07-29 11:08:51
                        )                )[9] => Array
                (
                    [gasHead] => Array
                        (
                            [dataenddate] => 2018-07-08
                            [lastgas] => 1267
                            [curgas] => 1288
                            [actchargegas] => 21
                            [gasmonthcost] => 44.94
                            [gascost] => 44.91
                            [flatefee] => 0
                            [keepmoney] => 0
                            [chargemoney] => 44.91
                            [bankcode] => Array
                                (
                                )                            [chargemethod] => 微信
                            [chargetime] => 2018-07-10 17:03:16
                        )                    [gasMx] => Array
                        (
                            [xh] => 1
                            [price] => 2.14
                            [amount] => 21
                            [sum] => 44.94
                        )                )

Answer 1

你这个原数组 本身的节点就有问题  dataenddate其他节点跟他都是兄弟节点 怎么帅选啊

Answer 2

那有办法筛选出  gasMx  节点存在的元素没

Answer 3

array_filter

Answer 4

$arr=array("",1,2,3,"");
$pattern="/\S+/i";
print_r(preg_grep($pattern,$arr));去除数组中空的值，第一种楼上版主已经写了。这是第二种方法