如何在php中打印变量值？

Question

I have a variable named ' $uname ' in a function from controller and I need to print the ' $uname ' value in the ' login_form_success ' under view.

login.php

public function uname_exist($uname) {
        $this->db->where('username', $uname);
        $query = $this->db->get('login');
        if (!$query->num_rows() > 0) {
            $this->form_validation->set_message(__FUNCTION__, 'Invalid Username');
            return FALSE;
        } else {

            return TRUE;
        }
    }

login_form_success.php

<div class="alert alert-success">Welcome <?php echo $uname; ?> Signed in !</div>

Answer 1

You can save the value in _SESSION array as

session_start();
$_SESSION['uname'] = $uname;

and use the same value anywhere by using $_SESSION['uname']

Answer 2

public function uname_exist($uname) {
        $this->db->where('username', $uname);
        $query = $this->db->get('login');
        if (!$query->num_rows() > 0) {
            $this->form_validation->set_message(__FUNCTION__, 'Invalid Username');
            $uname = "not exist";

        } else {
            $uname = "exist";

        }
        return $uname;
    }

use the $name return, and your html can got it by the same var name.

and better

public function uname_exist($uname) {
        $this->db->where('username', $uname);
        $query = $this->db->get('login');
        if (!$query->num_rows() > 0) {
            $this->form_validation->set_message(__FUNCTION__, 'Invalid Username');
            $unamehave = 'new person';

        } else {
            $unamehave = $uname;

        }
        return $unamehave;
    }

<div class="alert alert-success">Welcome <?php echo $unamehave; ?> Signed in !</div>

Answer 3

This is only for future visitors:

As you accepted the SESSION suggestion, i suggest you to use CI Session Library to follow framework standards:

You need to load session library in autoload.php as:

$autoload['libraries'] = array('session');

now you can access the session library in any where in your project just because of autoload.php file, this will load session library automatically, now you can store session variables in your controller as:

$sessionArray = array('uname'=>$uname);
$this->session->set_userdata($sessionArray);

then, this session value should be accessible in your view file as like:

echo $this->session->userdata('uname'); // will print your name

You can also load your session library inside your controller file, if you are not interested to load in autoload.php as:

$this->load->library('session'); // but this will not accessible in other controllers.