我有兩個變數，如下所示
$items1 =
[
[
"p_id" => 1000,
"value"=> 25
],
[
"p_id" => 2000,
"value"=> 15
],
[
"p_id" => 3000,
"value"=> 23
],
];
$items2 =
[
[
"p_id" => 1000,
"value"=> 5
],
[
"p_id" => 4000,
"value"=> 12
],
];
對于日志系統，我希望變數 $items1 成為參考并找到它對 $items2 變數的更改，最后得到以下輸出：
$deleted = [
[
"p_id" => 2000,
"value"=> 15
]
];
$added = [
[
"p_id" => 4000,
"value"=> 12
],
];
$changed = [
[
"p_id" => 1000,
"value"=> 5
],
];
對于日志系統可能是更好的建議格式，謝謝您的幫助
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作業示例
$items1 =
[
[
"p_id" => 1000,
"value"=> 25
],
[
"p_id" => 2000,
"value"=> 15
],
[
"p_id" => 3000,
"value"=> 23
],
];
$items2 =
[
[
"p_id" => 1000,
"value"=> 5
],
[
"p_id" => 4000,
"value"=> 12
],
];
function keyedByPidArray($items) {
$arr = [];
foreach($items as $item) {
$arr[$item['p_id']] = $item;
}
return $arr;
}
function changedItems($items1, $items2) {
$changed = [];
foreach($items1 as $item1) {
foreach($items2 as $k => $item2) {
if(($item1["p_id"] === $item2["p_id"]) && ($item1["value"] !== $item2["value"])) {
$changed[] = $item2;
unset($items2[$k]);
break;
}
}
}
return $changed;
}
$keyedByPidArr1 = keyedByPidArray($items1);
$keyedByPidArr2 = keyedByPidArray($items2);
$pids1 = array_column($items1, 'p_id');
$pids2 = array_column($items2, 'p_id');
$added = array_intersect_key($keyedByPidArr2, array_flip(array_diff($pids2, $pids1)));
$deleted = array_intersect_key($keyedByPidArr1, array_flip(array_diff($pids1, $pids2)));
$changed = changedItems($items1, $items2);
print_r($added);
print_r($deleted);
print_r($changed);
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