如何在查询中使用数组数据获取PHP中的其他数据

So here is my PHP code:

这是我的PHP代码:

$checkProject1Column = "SELECT * FROM tbl_studentchoice WHERE Project1 = '1'";
$resultProject1Column = mysqli_query($conn, $checkProject1Column);       
    while($row = mysqli_fetch_assoc($resultProject1Column)) {
            //Create an array of students
            $array[] = ['studentid' => $row['studentid']];
    }  
    //check marks database
    $checkmarks = "SELECT studentid,marks FROM tbl_marks";
    $checkResult = mysqli_query($conn, $checkmarks);
    if ($checkResult->num_rows >= 0){
        while($row1 = mysqli_fetch_assoc($checkResult)){
            //Create an array of students
            $array1[] = [
                'marks' => $row1['marks'],
                'studentid' => $row1['studentid']
                ];
            }
        print_r($array);
        print_r($array1);
$checkP