Php 如何在codeigniter中访问stdClass对象数组
我有以下Php 如何在codeigniter中访问stdClass对象数组,php,arrays,codeigniter,Php,Arrays,Codeigniter,我有以下print\r($rolePermissions)数组结果,不知道如何仅动态访问permID Array ( [0] => Array ( [0] => stdClass Object ( [roleID] => 1 [permID] => 1 ) [1] => stdClass Object ( [roleID] => 1 [permID] => 2 ) [2] => stdClass Object ( [roleID] => 1
print\r($rolePermissions)代码>数组结果,不知道如何仅动态访问permID
Array ( [0] => Array ( [0] => stdClass Object ( [roleID] => 1 [permID] => 1 ) [1] => stdClass Object ( [roleID] => 1 [permID] => 2 ) [2] => stdClass Object ( [roleID] => 1 [permID] => 3 ) [3] => stdClass Object ( [roleID] => 1 [permID] => 4 ) [4] => stdClass Object ( [roleID] => 1 [permID] => 5 ) [5] => stdClass Object ( [roleID] => 1 [permID] => 6 ) [6] => stdClass Object ( [roleID] => 1 [permID] => 7 ) [7] => stdClass Object ( [roleID] => 1 [permID] => 8 ) [8] => stdClass Object ( [roleID] => 1 [permID] => 9 ) [9] => stdClass Object ( [roleID] => 1 [permID] => 10 ) [10] => stdClass Object ( [roleID] => 1 [permID] => 11 ) [11] => stdClass Object ( [roleID] => 1 [permID] => 12 ) [12] => stdClass Object ( [roleID] => 1 [permID] => 13 ) [13] => stdClass Object ( [roleID] => 1 [permID] => 14 ) [14] => stdClass Object ( [roleID] => 1 [permID] => 15 ) [15] => stdClass Object ( [roleID] => 1 [permID] => 16 ) [16] => stdClass Object ( [roleID] => 1 [permID] => 17 ) [17] => stdClass Object ( [roleID] => 1 [permID] => 18 ) [18] => stdClass Object ( [roleID] => 1 [permID] => 19 ) [19] => stdClass Object ( [roleID] => 1 [permID] => 20 ) [20] => stdClass Object ( [roleID] => 1 [permID] => 21 ) [21] => stdClass Object ( [roleID] => 1 [permID] => 22 ) [22] => stdClass Object ( [roleID] => 1 [permID] => 23 ) [23] => stdClass Object ( [roleID] => 1 [permID] => 24 ) ) [1] => Array ( [0] => stdClass Object ( [roleID] => 2 [permID] => 2 ) [1] => stdClass Object ( [roleID] => 2 [permID] => 3 ) [2] => stdClass Object ( [roleID] => 2 [permID] => 4 ) ) [2] => Array ( [0] => stdClass Object ( [roleID] => 3 [permID] => 4 ) ) [3] => Array ( ) )
我正在使用以下代码访问:
$rolePermission[0]->permID
但我无法获得所有记录,因为每次的结果都可能不同,而索引0是不可行的方法。它显示一些记录和其他记录中的弹出错误
Error messages:
Undefined offset: 0
Message: Trying to get property of non-object
有什么帮助吗?在阵列上循环:
$ids = array();
foreach($rolePermission as $permissionObject){
$ids[] = $permissionObject->permID;
}
或在访问密钥之前检查密钥是否存在:
if(isset($rolePermission[0])) {
$id = $rolePermission[0]->permID;
}
注意:当您使用print_r()
时,当您从数据库中提取值时,它将在CI中输出带有stdClass对象的数组
有一种解决方案可以在迭代时不使用stdClass对象来显示数组
<强>实例:<>强>考虑<代码> $< < /COD> >考虑数组,而使用<代码> PrimtRE()>代码>它显示 STDC类对象< /C> >p>
- 您必须按如下方式使用循环,以避免打印时出现
stdClass对象
代码:
此代码可用于使用控制器和模型从DB检索的值
如果从数据库检索到输出的单行
如果从数据库检索到多行输出
如果在foreach中使用`->result()`来获取值,那么模型代码应该是什么样子
如果您使用上述方法检索输出,那么您的模型应该是这样的示例
employee_model.php
<?php
class Employee_model extends CI_Model{
function __construct() {
parent::__construct();
}
public function getEmployees()
{
$this->db->select('*');
$this->db->from('employee');
$this->db->where('delete_status','0');
$this->db->where('status','1');
$this->db->order_by('id','DESC');
$query = $this->db->get();
return $query;
}
?>
如何从控制器调用模型
在模型中编写此代码。最后一行将仅获取expire列的值,并将传递给控制器。然后您可以从表单视图访问它
function album_expire($user_id ,$album_iid)
{
$this->db->select('expire');
$this->db->from('mw_album');
$this->db->where('user_id', $user_id);
$this->db->where('id', $album_iid);
return $this->db->get()->row()->expire;
}
在控制器中,将值传递给视图
$data['album_expire'] = $this->albums_model->album_expire($user_id ,$album_iid);
在视图中,您可以这样访问它
<?php echo $album_expire; ?>
具体来说,您可能想看看is_a也:,您可以检查对象是否是stdClass,我建议使用instanceof
语句,而不是is_a
语句。例如:$rolePermission[0]实例stdClass
为您提出的请求提供了解决方案。试着分享一下你的想法。
function album_expire($user_id ,$album_iid)
{
$this->db->select('expire');
$this->db->from('mw_album');
$this->db->where('user_id', $user_id);
$this->db->where('id', $album_iid);
return $this->db->get()->row()->expire;
}
$data['album_expire'] = $this->albums_model->album_expire($user_id ,$album_iid);
<?php echo $album_expire; ?>