如何将数组与子元素合并

Question

I have an array with same customerid. I want to merge all same customerid arrays in to one with few amends to the array.

Array
(
    [0] => Array
        (
            [customerid] => 13
            [customer_fullname] => Chris
            [profession_id] => 8
            [profession_name] => Producer
         )

    [1] => Array
        (
            [customerid] => 1
            [customer_fullname] => John
            [profession_id] => 8
            [profession_name] => Producer

        )

    [2] => Array
        (
            [customerid] => 13
            [customer_fullname] => Chris
            [profession_id] => 7
            [profession_name] => Camera

        )

)

So now I want a new array to be created like this:

Array(
    [customerid] => 13
    [customer_fullname] => Chris
    [new_array] => array(
        [0]=>[profession_id] => 8, [profession_name] => Producer, 
        [1]=>[profession_id] => 7, [profession_name] => Camera
    )
)

Spent some time on it but wasn't able to get it right

Answer 1

There are better approaches if you're merging lots of records, but if you want a way to just merge two records as stated, I'd just do this:

$array1 = array(
      'customerid' => 13
      'customer_fullname' => 'John',
      'profession_id' => 8,
      'profession_name' => 'Producer'
);
$array2 = array(
      'customerid' => 13
      'customer_fullname' => 'John',
      'profession_id' => 7,
      'profession_name' => 'Director'
);

function merge_customers($customerA, $customerB)
{
    $newCustomer = array();
    if ($customerA['customerid'] == $customerB['customerid'])
    {
        $newCustomer['customerid'] = $customerA['customerid'];
        $newCustomer['customer_fullname'] = $customerA['customer_fullname'];

        $newCustomer['new_array'] = array(
            array(
                'profession_id' => $customerA['profession_id'],
                'profession_name' => $customerA['profession_name']
            ),
            array(
                'profession_id' => $customerB['profession_id'],
                'profession_name' => $customerB['profession_name']
            )
        );

        return $newCustomer;
    }

    /* We can't merge these if they're different customers. */
    return NULL;
}