The PHP foreach loop determines the value of the change. Wait for the great God to solve

    foreach ($gjtc as $key=>$val)    {        foreach ($gjtc2 as $key2=>$vals2)        {            if($key['order_id']==$key2['order_id'])            {            }        }    }

Writing here won't write, I'm going to add 2 array SP_TC based on the ID of the 1 group

Reply content:

    foreach ($gjtc as $key=>$val)    {        foreach ($gjtc2 as $key2=>$vals2)        {            if($key['order_id']==$key2['order_id'])            {            }        }    }

Writing here won't write, I'm going to add 2 array SP_TC based on the ID of the 1 group

Directly with the SQL statement operation is good, why also PHP write loop to operate it?

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