laravel php将数组与对象数组进行比较/差异
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php compare/diff an array with an array of objects
提问by feub
I have 2 PHP arrays, a simple one:
我有 2 个 PHP 数组，一个简单的数组：
array
0 => int 5
1 => int 6
and an array of objects:
和一组对象：
array
0 =>
object(stdClass)[43]
public 'id' => int 1
1 =>
object(stdClass)[46]
public 'id' => int 3
2 =>
object(stdClass)[43]
public 'id' => int 5
3 =>
object(stdClass)[46]
public 'id' => int 6
4 =>
object(stdClass)[46]
public 'id' => int 7
I'd like to make a diff of these 2 arrays to eliminate in the second those present in the first. In this example, i don't want the ids 5 and 6 in the second array. But i need help ;>
我想对这两个数组进行比较，以在第二个数组中消除第一个数组中存在的数组。在这个例子中，我不想要第二个数组中的 ids 5 和 6。但我需要帮助；>
Thank you.
谢谢你。
fabien
法比安
采纳答案by Glitch Desire
Assuming $objectsis your array of objects, and $valuesis your array of values to remove...
假设$objects是您的对象数组，并且$values是要删除的值数组...
You could use a foreachloop if you want to return objects:
foreach如果要返回对象，可以使用循环：
$values = array(5, 6);
$objects = array(
(object) array("id" => 1),
(object) array("id" => 3),
(object) array("id" => 5),
(object) array("id" => 6),
(object) array("id" => 7)
);
foreach($objects as $key => $object) {
if(in_array($object->id,$values)) {
unset($objects[$key]);
}
}
Live demo(0.008 sec)
现场演示（0.008 秒）
If you want to use the difffunction itself (that's possible but awkward, less readable and will just return an array of values) you can (as Baba suggested) return the idof the object inline:
如果你想使用diff函数本身（这可能但很笨拙，可读性较差，只会返回一个值数组），你可以（如 Baba 建议的那样）id内联返回对象的 ：
$values = array(5, 6);
$objects = array(
(object) array("id" => 1),
(object) array("id" => 3),
(object) array("id" => 5),
(object) array("id" => 6),
(object) array("id" => 7)
);
$diff = array_diff(array_map(function ($object) {
return $object->id;
}, $objects), $values);
Live demo(0.008 sec)
现场演示（0.008 秒）
回答by Baba
You can try :
你可以试试 ：
$diff = array_diff(array_map(function ($v) {
return $v->id;
}, $array2), $array1);
回答by Nick Maroulis
For versions older than 5.3
对于 5.3 之前的版本
foreach( $arr_2nd as $key => $val )
{
$arr_2nd[$key] = $val->id;
}
array_diff( $arr_1st, $arr_2nd );
回答by fullybaked
Loop over the second array and use in_arraymethod to check for existing values in first
循环遍历第二个数组并使用in_array方法检查第一个中的现有值
$firstArray = array(5, 6);
foreach ($objects as $key => $object) {
if (in_array($object->id, $firstArray)) {
unset($objects[$key];
}
}
