在select中将名称修改为数组

Modified name as array in select

<select id="selectShift" name="selectShift[]" multiple="multiple">

并做到了这一点，并且有效

and did like this and it works

$shiftarraycalc = array();
$shift=$_POST['selectShift'];

if ($shift)
{
    foreach ($shift as $value)
    {
        array_push($shiftarraycalc,$value);
    }
}