当我想使用代码点火器访问数据库中的某一列时，如何解决未定义的索引错误

Question

我想验证登录用户的密码是否与数据库中的密码匹配。然而，由于某种原因，即使我尝试回显它，我也无法提取单个数据。(echo$response['password']；(但是json_encode正在工作，正如poster结果所示。

控制器

function authentication(){
$stdnum = $this->input->post('student_number');
$password = $this->input->post('password');
$response = $this->api_model->login($stdnum);
// echo $password;
// echo $response['password'];
echo json_encode($response);
$result = array();
$result['login'] = array();

if (isset($stdnum, $password)){
if (password_verify($password, $response['password'])){ //line 95

$index['id'] = $response['id'];
$index['username'] = $response['username'];
$index['student_number'] = $response['student_number'];
$index['program'] = $response['program'];
$index['email'] = $response['email'];
array_push($result['login'], $index);
$result['success'] = "1";
$result['message'] = "success";
echo json_encode($result);


}
else{
$result['success'] = "0";
$result['message'] = "error";
echo json_encode($result);
}
}
else{
echo "null";
}
}

型号

function login($stdnum){
$this->db->where('student_number', $stdnum);
$query = $this->db->get('mydatabase');
return $query->row_array();
}

邮差结果

[{"id":"4","username":"qwe","student_number":"213","program":"asd","email":"asd","password":"asd"}]
<div style="border:1px solid #990000;padding-left:20px;margin:0 0 10px 0;">
<h4>A PHP Error was encountered</h4>
<p>Severity: Notice</p>
<p>Message: Undefined index: password</p>
<p>Filename: controllers/api.php</p>
<p>Line Number: 95</p>

<p>Backtrace:</p>

Answer 1

仅在模型result_array(。

->使用此模型函数

function login($stdnum){
$this->db->where('student_number', $stdnum);
$query = $this->db->get('mydatabase');
return $query->row_array();
}