Question

如何在多维数组中获取唯一值？我们只需要用逗号分隔多个数组中的唯一值即可。检查下面的数组

Array
(
    [0] => Array
        (
            [product_id] => BAT0002
            [vendor_id] => 1,2,3,4
        )

    [1] => Array
        (
            [product_id] => BAT0003
            [vendor_id] => 3
        )

    [2] => Array
        (
            [product_id] => BAT0004
            [vendor_id] => 1,2,3
        )

)

代码：-

$vendor_id = array();
foreach ($rfq_product_master_data_array as $rfq_data_array) 
{
    $product_id = $rfq_data_array['product_id'];
    $vendor_id[] = $rfq_data_array['vendor_id'];

}
$uniquePids = array_unique($vendor_id);
echo "<PRE>";
print_r($uniquePids);

实际结果：-

Array
(
    [0] => 1,2,3,4
    [1] => 3
    [2] => 1,2,3
)

预期结果：-

Array
    (
        [0] => 1,2,3,4
    )

Answer 1

您必须在foreach()中进行以下修改，然后进行编码：

foreach ($rfq_product_master_data_array as $rfq_data_array) 
{
    $product_id = $rfq_data_array['product_id'];

    $explodedArray = explode(',',$rfq_data_array['vendor_id']);
    foreach($explodedArray as $value){
        $vendor_id[$value] = $value;
    }
}
print_r($vendor_id); //so you can use it further directly.

//if you want comma separated string then

echo $uniquePids = implode(',',array_values($vendor_id));

特殊说明： ：它将为您提供用逗号分隔的所有唯一vendor_id字符串，就像假设您拥有

Array
(
    [0] => 1,2,3,4
    [1] => 5
    [2] => 1,2,6,7
)

它将产生：-1,2,3,4,5,6,7

Answer 2

您可以简单地使用内置的数组函数：

$data = //your data array

$res1[] = implode(',',array_unique(explode(',',implode(',',array_column($data,"vendor_id")))));

//array_column : to get single column - vendor_id
//implode : to combine all vendor ids
//explode : to split ids into array
//array_unique : to get unique values
//implode : to combine unique values

然后将所有函数的结果设置为o索引处的$ res1 []数组

var_dump($res1);

预期的简短代码

Array
(
    [0] => 1,2,3,4
)

Answer 3

这样做：

$vendor_ids = array();
foreach ($rfq_product_master_data_array as $rfq_data_array) 
{
    $product_id = $rfq_data_array['product_id'];
    $vendor_ids = array_merge($vendor_ids, explode(",", $rfq_data_array['vendor_id']));
}
$uniquePids = array_unique($vendor_ids);
echo "<PRE>";
print_r($uniquePids);

如何在PHP数组中获得唯一的价值？

3 个答案: