Simple Counter App - Codeigniter Typing CST Test

Simple Counter App — Codeigniter Code

Demonstrates a simple CodeIgniter controller and routes for a counter using session for state persistence.

<?php

// application/controllers/Counter.php
class Counter extends CI_Controller {
	public function __construct() {
		parent::__construct();
		$this->load->library('session');
		if (!$this->session->has_userdata('count')) {
		$this->session->set_userdata('count', 0);
		}
	}

	public function index() {
		$count = $this->session->userdata('count');
		echo "<h2>Counter: $count</h2>";
		echo "<form method='post' action='/counter/increment'><button type='submit'>+</button></form>";
		echo "<form method='post' action='/counter/decrement'><button type='submit'>-</button></form>";
		echo "<form method='post' action='/counter/reset'><button type='submit'>Reset</button></form>";
	}

	public function increment() {
		$count = $this->session->userdata('count') + 1;
		$this->session->set_userdata('count', $count);
		redirect('/counter');
	}

	public function decrement() {
		$count = $this->session->userdata('count') - 1;
		$this->session->set_userdata('count', $count);
		redirect('/counter');
	}

	public function reset() {
		$this->session->set_userdata('count', 0);
		redirect('/counter');
	}
}

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