[英]PHP | Codeigniter Redirect | Cannot modify header information
我尝试从CodeIgniter使用redirect()函数时遇到问题。
错误是(当我尝试调用addMed()
函数时)
A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /a_directory/CabUser.php:46)
Filename: helpers/url_helper.php
Line Number: 561
Backtrace:
File: /a_directory/CabUser.php>
Line: 48
Function: redirect
File: /a_directory/index.php
Line: 315
Function: require_once
我的文件“ CabUser.php”
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class CabUser extends CI_Controller {
function __construct() {
parent::__construct();
$this->load->database();
}
public function index() {
if ($this->session->has_userdata('for_login')) {
$userPrivelegies = $this->session->userdata['for_login']['privelegies'];
if($userPrivelegies) {
redirect('CabMed', 'refresh');
}
else {
$this->load->model('Cab_model');
$this->Cab_model->getUserData();
}
}
else {
redirect('login');
}
}
function logout() {
if ($this->session->has_userdata('for_login')) {
$this->session->sess_destroy('for_login');
}
redirect('home', 'refresh');
}
function addMed() {
$data['numePrenumeMedic'] = $this->input->post('medic');
$username = $this->session->userdata['for_login']['username'];
$this->db->where('username', $username);
$query = $this->db->get('Users');
$ID = $query->row()->ID;
$this->db->where('ID', $ID);
$this->db->update('UserData', $data);
echo "<script>
alert('Succes!!!');
</script>";
redirect('CabUser', 'refresh'); //here's the problem
}
function upload() {
if ($this->input->post('update')) {
$data['numePrenume'] = $this->input->post('name');
$data['numePrenume'] = $this->input->post('name');
$data['facebook'] = $this->input->post('facebook');
$data['ok'] = $this->input->post('ok');
$data['instagram'] = $this->input->post('instagram');
$data['datanasterii'] = $this->input->post('year') . '-' . $this->input->post('month') .'-' . $this->input->post('day');
$data['telefon'] = $this->input->post('telefon');
$data['adresa'] = $this->input->post('address');
$data['sex'] = $this->input->post('sex');
$sess = $this->session->userdata('for_login', 'username');
$this->db->where('username',$sess['username']);
$query = $this->db->get('Users');
$ID = $query->row()->ID;
$this->db->where('ID', $ID);
$this->db->update('Users', $data);
$this->db->where('ID', $ID);
$this->db->set('numePrenumePacient', $data['numePrenume']);
$this->db->update('Pacienti');
echo "<script>
alert('Succes!!!');
</script>";
redirect('CabUser', 'refresh');
}
else {
echo "<script>
alert('Error to update. \n Try later please...);
</script>";
redirect('CabUser', 'refresh');
}
}
}
?>
您的解决方案是
删除echo "<script> alert('Succes!!!'); </script>";
您在使用redirect()
函数的任何地方编写代码。 因为重定向功能使用php的header
功能,并且在任何标头之前,所以您不应回显或向浏览器发送任何内容。
这就是错误的意思。
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