來自數組的動態變量

Question

我將字段名存儲在一個數組中，希望能夠動態地創建變量。

我收到一個非法偏移類型錯誤的，如果和其他人，這兩條線：

$data[$tmp_field] = $tmp_field[$id]; 

$data[$tmp_field] = 0; 

我檢查後數據，並將其與適當的數據發佈，但是我不知道是什麼問題是。

$ student_id數據存儲所有學生的ID，例如：$student_id = array(8,9,11,23,30,42,55);

function updateStudentInfo() { 
    $student_id = $this->input->post('student_id'); 
    $internet_student = $this->input->post('internet_student'); 
    $dismissed = $this->input->post('dismissed'); 
    $non_matriculated_student = $this->input->post('non_matriculated_student'); 
    $felony = $this->input->post('felony'); 
    $probation = $this->input->post('probation'); 
    $h_number = $this->input->post('h_number'); 
    $office_direct_to = $this->input->post('office_direct_to'); 
    $holds = $this->input->post('holds'); 

    $fields = array('internet_student', 'non_matriculated_student', 'h_number', 'felony', 'probation', 'dismissed'); 

    foreach($student_id as $id): 
    $data = array(); 

    foreach($fields as $field_name): 
     $tmp_field = ${$field_name}; 

     if(empty($tmp_field[$id])) { 
     $data[$tmp_field] = 0; 
     } else { 
     $data[$tmp_field] = $tmp_field[$id]; 
     } 
    endforeach; 

    print '<pre style="color:#fff;">'; 
    print_r($data); 
    print '</pre>'; 

    endforeach; 
} 

這是陣列格式我的願望：

Array 
(
    [internet_student] => 1 
    [non_matriculated_student] => 1 
    [h_number] => 0 
    [felony] => 0 
    [probation] => 1 
    [dismissed] => 0 
) 

新增截圖給你視覺形式的數據正在發佈從

Answer 1

foreach($student_id as $id): 
    $data = array(); 

    foreach($fields as $field_name): 
     $tmp_field = ${$field_name}; 

     if(empty($tmp_field[$id])) { 
     $data[$field_name] = 0; 
     } else { 
     $data[$field_name] = $tmp_field[$id]; 
     } 
    endforeach; 

    print '<pre style="color:#fff;">'; 
    print_r($data); 
    print '</pre>'; 

    endforeach; 

Answer 2

我假設所有這些字段都是數組，否則你不需要任何循環。

function updateStudentInfo() 
{ 
    $student_id     = $this->input->post('student_id'); 
    $internet_student   = $this->input->post('internet_student'); 
    $dismissed    = $this->input->post('dismissed'); 
    $non_matriculated_student = $this->input->post('non_matriculated_student'); 
    $felony      = $this->input->post('felony'); 
    $probation    = $this->input->post('probation'); 
    $h_number     = $this->input->post('h_number'); 
    $office_direct_to   = $this->input->post('office_direct_to'); 
    $holds     = $this->input->post('holds'); 

    $fields = array('internet_student', 'non_matriculated_student', 'h_number', 'felony', 'probation', 'dismissed'); 

    $student_count = count($student_id); 
    foreach($student_id as $id) 
    { 
     $data = array(); 
     foreach($fields as $field) 
     { 
      if(array_key_exists($id, $$field)) 
       $data[$field] = ${$field}[$id]; 
     } 
    } 
} 

您正在嘗試使用學生證作爲數組鍵的其他領域，但HTML形式僅僅是一個標準的索引數組，而不是鍵入任何學生數據。