如何使用自定义或用户定义的标准在php中合并和排序数组?
问题描述:
I have two array
:
$data1 = array(
(0) => array("level" => 1, "id" => 1, "index" => 1, "amount" => 50000),
(1) => array("level" => 1, "id" => 2, "index" => 1, "amount" => 40000),
(2) => array("level" => 1, "id" => 3, "index" => 1, "amount" => 0));
$data2 = array(
(0) => array("level" => 2, "id" => 1, "index" => 1, "amount" => 30000),
(1) => array("level" => 2, "id" => 1, "index" => 2, "amount" => 20000),
(2) => array("level" => 2, "id" => 2, "index" => 1, "amount" => 15000),
(3) => array("level" => 2, "id" => 2, "index" => 2, "amount" => 25000),
(4) => array("level" => 2, "id" => 3, "index" => 1, "amount" => 0));
I want to merge those array into one array and the result is like this :
$expected = array(
(0) => array("level" => 1, "id" => 1, "index" => 1, "amount" => 50000),
(1) => array("level" => 2, "id" => 1, "index" => 1, "amount" => 30000),
(2) => array("level" => 2, "id" => 1, "index" => 2, "amount" => 20000),
(3) => array("level" => 1, "id" => 2, "index" => 1, "amount" => 40000),
(4) => array("level" => 2, "id" => 2, "index" => 1, "amount" => 15000),
(5) => array("level" => 2, "id" => 2, "index" => 2, "amount" => 25000));
I've tried to use array_merge_recursive :
$try = array_merge_recursive($data1, $data2);
But the result is like this :
$try = array(
(0) => array("level" => 1, "id" => 1, "index" => 1, "amount" => 50000),
(1) => array("level" => 1, "id" => 2, "index" => 1, "amount" => 40000),
(3) => array("level" => 1, "id" => 3, "index" => 1, "amount" => 0),
(4) => array("level" => 2, "id" => 1, "index" => 1, "amount" => 30000),
(5) => array("level" => 2, "id" => 1, "index" => 2, "amount" => 20000),
(6) => array("level" => 2, "id" => 2, "index" => 1, "amount" => 15000),
(7) => array("level" => 2, "id" => 2, "index" => 2, "amount" => 25000),
(8) => array("level" => 2, "id" => 3, "index" => 1, "amount" => 0));
I have criteria for my result :
- Remove array where amount=0
- Sort and order by id,level,index
I've read about uasort and usort but i dont have any idea how to implement that function to match what i need. Is that function (uasort/usort) can solve it or any other idea? Please help me, thanks!
答
$data = array_merge($data1, $data2);
$data = array_filter($data, function ($d) {
return $d['amount'] != 0;
});
usort($data, function ($a, $b) {
if ($a['id'] != $b['id']) return $a['id'] - $b['id'];
if ($a['level'] != $b['level']) return $a['level'] - $b['level'];
else return $a['index'] - $b['index'];
});
Note: Uses PHP 5.3+ anonymous function syntax.
答
Does this work for you:
$finalArr = array_merge($data1,$data2); foreach($finalArr as $key => $val) { if(empty($val['amount'])) { unset($finalArr[$key]); } } echo "<pre>"; sort($finalArr); print_r($finalArr);
Hope it helps