Question

我有这样的数组：

Array
(
    [0] => stdClass Object
        (
            [model_id] => 1
            [category_id] => 1
            [model_name] => Xperia
            [category_name] => Mobile
            [category_image] => 81649e37620644bec47244fda5233363.jpg
            [item_type] => 1
        )

    [1] => stdClass Object
        (
            [model_id] => 3
            [category_id] => 1
            [model_name] => HTC One
            [category_name] => Mobile
            [category_image] => 250a3e4655454feaec8e2537d149846a.jpg
            [item_type] => 1
        )

    [2] => stdClass Object
        (
            [model_id] => 9
            [category_id] => 3
            [model_name] => Apple TV
            [category_name] => Televisions
            [category_image] => no_image.jpg
            [item_type] => 1
        )

    [3] => stdClass Object
        (
            [model_id] => 4
            [category_id] => 2
            [model_name] => MacBook
            [category_name] => Laptop
            [category_image] => c9890535d26bd06189fc22940a5ee5da.jpg
            [item_type] => 1
        )

    [4] => stdClass Object
        (
            [model_id] => 2
            [category_id] => 1
            [model_name] => iPhone 7
            [category_name] => Mobile
            [category_image] => cab0631b071d0562412ccab2279d391e.jpg
            [item_type] => 1
        )

    [5] => stdClass Object
        (
            [model_id] => 5
            [category_id] => 3
            [model_name] => Samsung TV
            [category_name] => Televisions
            [category_image] => e60bd4822e516a93f1e99a8b456b70ce.jpg
            [item_type] => 1
        )
)

如何删除category_id以及item_type重复的元素？使用下面的代码，我只能删除任何单个值重复的元素。

foreach($all_device_categories as $arr){
    if(!isset($result[$arr->category_id])){
        $result[$arr->category_id] = $arr;
    }
}

更新：category_id以及item_type不应同时重复。如果category_id重复但不重复item_type，反之亦然。

Answer 1

用于多键匹配。您可以将这些键组合到数组键中。试试这个：

foreach($all_device_categories as $arr){
    if(!isset($result[$arr->category_id.$arr->item_type])){
        $result[$arr->category_id.$arr->item_type] = $arr;
    }
}

Answer 2

如果category_id和item_type重复，您只需要存储一个值，那么您需要使用其他字符连接它们，例如： - 。如果你不这样做，那么一些信息将被遗漏。

foreach($all_device_categories as $arr){
    $result[$arr->category_id.'-'.$arr->item_type] = $arr;        
}

我认为这会对您有所帮助。如果发现任何匹配，这将始终采用更新数组值。如果您不想获取更新值，那么只需在存储新数组之前应用条件。

foreach($all_device_categories as $arr){
    if(!isset($result[$arr->category_id.'-'.$arr->item_type])){
        $result[$arr->category_id.'-'.$arr->item_type] = $arr;
    }
}

第二个例子只存储第一个匹配，如果重复出现则会避免。

如何在php中删除特定值在数组中重复的元素？

2 个答案: