Question

有人可以帮我解决这个问题，我收到此错误消息提示：未定义的变量：选择，我理解错误，但我没有看到问题。

public function getEmployeesArray($conn) 
{
    // $conn = 
    // $conn = $this->get('database_connection');
    $employees = $conn->fetchall('Select * from vEmployee order by emp_lastname');

    foreach ($employees as $emp_row) {
        $choices[$emp_row['employee_id']] = $emp_row['emp_lastname'] . ', ' . $emp_row['emp_firstname'];
    }

    return $choices;
}

Answer 1

在$choices尝试此操作之前，

是foreach未定义：

 public function getEmployeesArray($conn) {
            // $conn = 
    //        $conn = $this->get('database_connection');
            $employees = $conn->fetchall('Select * from vEmployee order by emp_lastname');

            $choices = [];

            foreach ($employees as $emp_row) {

                $choices[$emp_row['employee_id']] = $emp_row['emp_lastname'] . ', ' . $emp_row['emp_firstname'];
            }

            return $choices;
        }

Answer 2

试试这个：

public function getEmployeesArray($conn) {   
    $choices = []; //or what you want

    $employees = $conn->fetchall('Select * from vEmployee order by emp_lastname');
    foreach ($employees as $emp_row) {
         $choices[$emp_row['employee_id']] = $emp_row['emp_lastname'] . ', ' . $emp_row['emp_firstname'];
    }

    return $choices;
}

您需要初始化$choices，因为如果没有$employees它从未设置过。

现在的问题是您的查询没有返回任何值，因此您的代码无法进入您的foreach循环

Symfony中的未定义变量

2 个答案: