我是php新手。我正在做一个关于在线公交票务系统的项目。
在系统的一部分，我想更新数据库的一个表。起初，我想显示表中的所有行，这是我在index方法中完成的。当一行被选中时，它的属性值（它是主键）被捕获在"编辑计划"方法中。该值保存在类变量attr_value中。在那里，我调用另一个视图来接收更新的信息。从该视图中，信息通过表单传递到"e_schedules"方法。但在那里，类变量attr_value的值被重置为默认值。但我希望该值保存在"edit_schedule"方法中。我该怎么做？
控制器类
<?php
//$flag_edit_schedule = 1 ;
class edit_schedule extends CI_Controller {
//public $flag_edit_schedule = 1 ;
public $attr_value=1;
protected $table= 'schedule';
function index() {
$data= array();
if($query = $this->database_model->get_records($this->table)){
$data['records']= $query;
}
$this->load->view('select_schedule_view',$data) ;
}
function e_schedules(){
//$table='schedule';
$attribute_name='schedule_no';
$attribute_value=$this->attr_value;
echo $this->attr_value;
$data = array(
'schedule_no' => $this->attr_value,
'bus_no' => $this->input->post('bus_no'),
'route_no' => $this->input->post('route_no'),
'start_time' => $this->input->post('start_time')
);
//$this->database_model->update_record($this->table,$attribute_name,$attribute_value,$data);
//redirect('/admin/admin_home');
echo $attribute_name;
}
function edit_schedules() {
$this->attr_value=$this->uri->segment(4) ;
echo $this->attr_value;
$this->load->view('edit_schedule_view');
}
}
select_schedule_view
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title></title>
<style>
table, th, td {
padding: 5px;
}
th,td {
text-align: center;
}
table {
border-spacing: 15px;
}
</style>
</head>
<body>
<h2>Select Schedule </h2>
<table style="width:75%">
<tr>
<th> bus_no </th>
<th> route_no </th>
<th> time </th>
</tr>
<?php if(isset($records)) : foreach($records as $rows) : ?>
<tr>
<td><?php echo anchor("admin/edit_schedule/edit_schedules/$rows->schedule_no", $rows->bus_no); ?></td>
<td> <?php echo $rows->route_no?> </td>
<td> <?php echo $rows->start_time ?></td>
</tr>
<?php endforeach; ?>
<?php else: ?>
<h2> No records were returned </h2>
<?php endif; ?>
</table>
</body>
编辑日程表查看
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<h2> Edit Route </h2>
<?php echo form_open('admin/edit_schedule/e_schedules'); ?>
<p>
<label for="bus_no"> Enter Bus Number:</label>
<input type="text" name="bus_no" id="bus_no" />
</p>
<p>
<label for="route_no"> Enter Route Number:</label>
<input type="text" name="route_no" id="route_no" />
</p>
<p>
<label for="start_time"> Start Time:</label>
<input type="text" name="start_time" id="start_time" />
</p>
<p>
<input type="submit" value="Edit" />
</p>
<?php echo form_close(); ?>
<hr />
</body>
这是我的第一篇帖子。我通过滚动其他问题和答案做了这么多。但现在我需要一个快速的帮助，因为我的时间不多了。
您必须进行以下更改：
控制器类
function edit_schedules($schedule_no) {
$this->db->select('*');
$this->db->from($this->table);
$this->db->where('schedule_no',$schedule_no);
$query = $this->db->get();
$data['current_schedule'] = $query->result();
$this->load->view('edit_schedule_view',$data);
}
function e_schedules(){
$data = array(
'bus_no' => $this->input->post('bus_no'),
'route_no' => $this->input->post('route_no'),
'start_time' => $this->input->post('start_time')
);
$this->db->where('schedule_no',$this->input->post('schedule_no');
$this->db->update($this->table);
redirect('/admin/admin_home');
}
edit_schedule_view
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<h2> Edit Route </h2>
<?php echo form_open('admin/edit_schedule/e_schedules'); ?>
<p>
<label for="bus_no"> Enter Bus Number:</label>
<input type="text" name="bus_no" id="bus_no" value="<?php echo $current_schedule->bus_no; ?>" />
</p>
<p>
<label for="route_no"> Enter Route Number:</label>
<input type="text" name="route_no" id="route_no" value="<?php echo $current_schedule->route_no; ?>" />
</p>
<p>
<label for="start_time"> Start Time:</label>
<input type="text" name="start_time" id="start_time" value="<?php echo $current_schedule->start_time ?>" />
</p>
<p>
<input type="hidden" name="schedule_no" value="<?php echo $current_schedule->id; ?>" />
<input type="submit" value="Edit" />
</p>
<?php echo form_close(); ?>
<hr />
</body>
您的变量$attr_value将始终包含默认值，因为您正在初始化类内的值，并且不会使用外部参数更改值。您需要在路由中传递schedule_no才能在控制器中使用它。我将建议以下更改：
控制器
function e_schedules($schedule_no){
//$table='schedule';
$attribute_name='schedule_no';
$attribute_value=$schedule_no;
$this->attr_value = $schedule_no;
echo $this->attr_value;
$data = array(
'schedule_no' => $this->attr_value,
'bus_no' => $this->input->post('bus_no'),
'route_no' => $this->input->post('route_no'),
'start_time' => $this->input->post('start_time')
);
//$this->database_model->update_record($this->table,$attribute_name,$attribute_value,$data);
//redirect('/admin/admin_home');
echo $attribute_name;
}
function edit_schedules() {
$this->attr_value=$this->uri->segment(4) ;
echo $this->attr_value;
$this->load->vars($this->attr_value);
$this->load->view('edit_schedule_view');
}
编辑日程表查看
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<h2> Edit Route </h2>
<?php echo form_open('admin/edit_schedule/e_schedules/' . $attr_value); ?>
<p>
<label for="bus_no"> Enter Bus Number:</label>
<input type="text" name="bus_no" id="bus_no" />
</p>
<p>
<label for="route_no"> Enter Route Number:</label>
<input type="text" name="route_no" id="route_no" />
</p>
<p>
<label for="start_time"> Start Time:</label>
<input type="text" name="start_time" id="start_time" />
</p>
<p>
<input type="submit" value="Edit" />
</p>
<?php echo form_close(); ?>
<hr />
</body>
如果您需要任何帮助来理解我建议的更改，请告诉我。