[英]Search an array of object and return new array of objects
我需要一些幫助。 我一直在試圖解決這個問題,但我不能,所以我想要做的是我試圖將對象數組 blackListUser 與 contactUsers 進行比較。 如果有匹配,我想返回新用戶的白名單,而不是最后一個預期的新數組的后備用戶。
for($counter = 0; $counter < count($blackListUsers); $counter++) {
how i can check here
}
ContactUsers
Array
(
[0] => stdClass Object
(
[user_id] => 2
[full_name] => User B
[image] => 1582735876user-a.png
)
[1] => stdClass Object
(
[user_id] => 3
[full_name] => User C
[image] => 1582735876user-a.png
)
[2] => stdClass Object
(
[user_id] => 4
[full_name] => User D
[image] => 1582735876user-a.png
)
[3] => stdClass Object
(
[user_id] => 5
[full_name] => User E
[image] => 1582735876user-a.png
)
[4] => stdClass Object
(
[user_id] => 6
[full_name] => User F
[image] => 1582735876user-a.png
)
[5] => stdClass Object
(
[user_id] => 8
[full_name] => User G
[image] => 1582735876user-a.png
)
)
blackListUsers
Array
(
[0] => stdClass Object
(
[user_id] => 2
[full_name] => User B
[image] => 1582735876user-a.png
)
[1] => stdClass Object
(
[user_id] => 3
[full_name] => User C
[image] => 1582735876user-a.png
)
)
expected new array
Array
(
{
"user_id": "4",
"name": "User D",
"image": "1582735876user-a.png"
},
{
"user_id": "5",
"name": "User E",
"image": "1582735876user-a.png"
},
{
"user_id": "6",
"name": "User F",
"image": "1582735876user-a.png"
},
{
"user_id": "8",
"name": "User G",
"image": "1582735876user-a.png"
}
)
<?php
$user1->user_id = 2;
$user1->full_name = 'User B';
$user1->image = '1582735876user-a.png';
$user2->user_id = 3;
$user2->full_name = 'User C';
$user2->image = '1582735876user-a.png';
$user3->user_id = 4;
$user3->full_name = 'User D';
$user3->image = '1582735876user-a.png';
$user4->user_id = 3;
$user4->full_name = 'User C';
$user4->image = '1582735876user-a.png';
$users = [$user1, $user2, $user3];
$blackListedUsers = [$user4];
$res = array_filter($users, function ($user) use ($blackListedUsers) {
return !in_array($user, $blackListedUsers);
});
var_dump($res);
將array_filter與匿名函數一起使用; 和in_array 。 閱讀in_array
文檔以查看它是否符合您的需要,因為它正在比較兩個對象,您可以使用自定義函數,該函數僅測試兩個對象的 id 是否相等。
更新
或者更適合初學者的代碼版本:
<?php
$user1->user_id = 2;
$user1->full_name = 'User B';
$user1->image = '1582735876user-a.png';
$user2->user_id = 3;
$user2->full_name = 'User C';
$user2->image = '1582735876user-a.png';
$user3->user_id = 4;
$user3->full_name = 'User D';
$user3->image = '1582735876user-a.png';
$user4->user_id = 3;
$user4->full_name = 'User C';
$user4->image = '1582735876user-a.png';
$users = [$user1, $user2, $user3];
$blackListedUsers = [$user4];
$validUsers = [];
foreach ($users as $user) {
if (!isBlacklisted($user, $blackListedUsers)) {
$validUsers[] = $user;
}
}
var_dump($validUsers);
function isBlacklisted($user, $blackListedUsers) {
foreach ($blackListedUsers as $blackListedUser) {
if ($user->user_id == $blackListedUser->user_id) {
return true;
}
}
return false;
}
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