[Solved] Getting Error Function name must be a string

I am getting this error below

PHP Code:

Fatal error: Function name must be a string in C:\xampp\htdocs\cookie\application\controllers\Welcome.php on line 23
A PHP Error was encountered

Severity: Error

Message: Function name must be a string

Filename: controllers/Welcome.php

Line Number: 23

Backtrace: 


I am trying to set a if statement so if cookie time has expire will be delete any suggestions on better time expire check.

PHP Code:

<?php

defined('BASEPATH') OR exit('No direct script access allowed');

class Welcome extends CI_Controller {

    public $expire_for_cookie = 1440;

    public function __construct() {
        parent::__construct();
    }

    public function index() {
        $remember = $this->input->post('remember');

        if (isset($remember)) {
            $this->write_cookie($remember);
        }

        $current_time = time();
        $expire_time = $this->set_cookie_delete_time();

        if($current_time() > $expire_time) { // Line 23
            $this->delete_cookie();
            echo "Your cookie has been removed";
        } 

        $this->load->view('welcome_message');
    }

    public function write_cookie($remember = TRUE) {
        setcookie('remember', $remember , $this->set_cookie_expire_time(), '/', '.localhost');
    }

    public function delete_cookie() {
        setcookie('remember', '' , $this->set_cookie_delete_time(), '/', '.localhost');
    }

    public function set_cookie_expire_time() {
        return time() + $this->expire_for_cookie;
    }

    public function set_cookie_delete_time() {
        // From Database But At The Moment Just Set Manually
        return time() - $this->expire_for_cookie;
    }
} 


There's only one rule - please don't tell anyone to go and read the manual.  Sometimes the manual just SUCKS!

Line 23, $current_time() should be $current_time without the brackets.

Line 23, $current_time() should be $current_time without the brackets.

Thanks silly mistake by me brain not thinking.

There's only one rule - please don't tell anyone to go and read the manual.  Sometimes the manual just SUCKS!