[英]PHP Group Array values then sum
我如何按成人價格分組然后獲得成人人數的總和。 這是我的陣列波紋管:
Array
(
[0] => Array
(
[Reservation] => Array
(
[adult_price] => 2000
[adult_count] => 2
)
)
[1] => Array
(
[Reservation] => Array
(
[adult_price] => 2000
[adult_count] => 1
)
)
[2] => Array
(
[Reservation] => Array
(
[adult_price] => 300
[adult_count] => 1
)
)
)
如果 Adult_price 與 Adult_count 相加的時間相同,則預期結果:
Array
(
[0] => Array
(
[Reservation] => Array
(
[adult_price] => 2000
[adult_count] => 4
)
)
[1] => Array
(
[Reservation] => Array
(
[adult_price] => 300
[adult_count] => 1
)
)
)
請幫幫我謝謝!
嘗試這樣的事情:
function summarize($ReservationArr){
$summed = [];
foreach ($ReservationArr as $one){
$adult_price = $one["Reservation"]["adult_price"];
$adult_count= $one["Reservation"]["adult_count"];
if (isset( $summed[$adult_price])){
$summed[$adult_price] += (int)$adult_count;
} else {
$summed[$adult_price] = (int)$adult_count;
}
}
// now rebuild:
$result = [];
foreach ($summed as $price => $number){
$result[] = array("Reservation" => array("adult_price" => $price, "adult_count" => $number));
}
return $result;
}
$test = [];
$test[] = array("Reservation" => array("adult_price" => 2000, "adult_count" => 2));
$test[] = array("Reservation" => array("adult_price" => 1000, "adult_count" => 1));
$test[] = array("Reservation" => array("adult_price" => 500, "adult_count" => 4));
$test[] = array("Reservation" => array("adult_price" => 2000, "adult_count" => 3));
$test[] = array("Reservation" => array("adult_price" => 2000, "adult_count" => 2));
$test[] = array("Reservation" => array("adult_price" => 1000, "adult_count" => 1));
$test[] = array("Reservation" => array("adult_price" => 500, "adult_count" => 4));
$test[] = array("Reservation" => array("adult_price" => 2000, "adult_count" => 3));
$res = summarize($test);
echo "<pre>";
print_r($res);
echo "</pre>";
嘗試這個:
$grouped = [];
foreach ($array as $item) {
$item = $item["Reservation"];
$currentValue = isset($grouped[$item["adult_price"]]) ? $grouped[$item["adult_price"]] : 0;
$grouped[$item["adult_price"]] = $currentValue + $item["adult_count"];
}
$buildArray = [];
foreach ($grouped as $price => $count) {
$buildArray[] = ["Reservation" => ["adult_price" => $price, "adult_count" => $count]];
}
print_r($buildArray);
使用兩個循環是太多不必要的工作。 將輸出數組視為不斷更新的查找數組。 這將決定您是在處理一個新的 Adult_price 還是之前遇到過的一個。 使用$row['Reservation']['adult_price']
值作為新的臨時第一級鍵——這有助於isset()
知道是否應該保存整行,或者是否應該將 Adult_count 添加到存儲的計數中。
代碼:(演示)
$rows = [
["Reservation" => ["adult_price" => 2000, "adult_count" => 2]],
["Reservation" => ["adult_price" => 1000, "adult_count" => 1]],
["Reservation" => ["adult_price" => 500, "adult_count" => 4]],
["Reservation" => ["adult_price" => 2000, "adult_count" => 3]],
["Reservation" => ["adult_price" => 2000, "adult_count" => 2]],
["Reservation" => ["adult_price" => 1000, "adult_count" => 1]],
["Reservation" => ["adult_price" => 500, "adult_count" => 4]],
["Reservation" => ["adult_price" => 2000, "adult_count" => 3]],
];
$result = [];
foreach ($rows as $row) {
if (!isset($result[$row['Reservation']['adult_price']])) {
$result[$row['Reservation']['adult_price']] = $row;
} else {
$result[$row['Reservation']['adult_price']]['Reservation']['adult_count'] += $row['Reservation']['adult_count'];
}
}
var_export(array_values($result));
或者,這可能會減少眼睛疲勞:
foreach ($rows as $row) {
$key = $row['Reservation']['adult_price'];
if (!isset($result[$key])) {
$result[$key] = $row;
} else {
$result[$key]['Reservation']['adult_count'] += $row['Reservation']['adult_count'];
}
}
輸出:(來自任一片段)
array (
0 =>
array (
'Reservation' =>
array (
'adult_price' => 2000,
'adult_count' => 10,
),
),
1 =>
array (
'Reservation' =>
array (
'adult_price' => 1000,
'adult_count' => 2,
),
),
2 =>
array (
'Reservation' =>
array (
'adult_price' => 500,
'adult_count' => 8,
),
),
)
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