a json testing controller in CodeIgniter.

json_test.php

<?php

class Json_test extends Controller {
    public function setter() {
		$fp = fopen("/tmp/json_test.txt","w");
		$content = json_encode($_POST);
		fwrite($fp, $content, strlen($content));
		fclose($fp);
		echo $content;
	}
	
	public function getter() {
		$result = file_get_contents("/tmp/json_test.txt");
		echo $result;
	}
}