Question

did can be defined a variable for multi function(in codeigniter)? how is it?

because i must use of a value similar in multi function.

like:

  class Home extends CI_Controller {
   $hi = 'hello'
    function one() {
       echo $hi;
    }
    function tow() {
       echo $hi;
    }
  }

Answer 1

what about doing something like this

class Home extends CI_Controller {
    protected $_hi = 'hi';
    function one() {
       echo $this->_hi;
    }
    function tow() {
       echo $this->_hi;
    }
  }

if the hi is a constant you have better to use the const keyword

  class Home extends CI_Controller {
    const HI = 'hi';
    function one() {
       echo self::HI;
    }
    function tow() {
       echo self::HI;
    }
  }

last point if that constant is used in more than one controller you have better to create a separate class and define the constant in that class.

  class Home extends CI_Controller {
    protected $_find;

    function __construct() {
        parent::__construct();
        $this->_find = $this->input->post('find');
    }

    function one() {
       echo $this->_find;
    }
    function tow() {
       echo $this->_find;
    }
  }

one remark with the last code snipet, I am not an codeigniter expert so not sure if you can do $this->input->post('find') would work in the constructor