Hey Everyone!

So I am fairly versed with PHP applications but I am rather new to OOP with PHP. I am getting the following error: Fatal error: Fatal error: Call to undefined function: gear_up()

Sure this is just some sticky syntax. Here's my object code:

PHP Code:

 
include ("class.bike.php");
 
$bike = new Bike();
$this->gear = gear_up();
$this->color = change_color("Blue");
$this->cadence = speed_up();
echo $bike->cadence . "<br>";
echo $bike->gear . "<br>";
echo $bike->color; 


I'm guessing the problem must lie within my class constructor which looks like this:

PHP Code:

class Bike
{
 var $cadence = 0;
 var $gear = 1;
 var $color = "Red";
 
 function Bike() {
 }
function slow_down(){
 if ($this->cadence > 0){
 
 $this->cadence--;
 
 }
else{
echo ("You are already stopped");
}
 }
 
function speed_up(){
 $this->cadence++;
}
function gear_up(){
 $this->gear++;
}
function gear_down(){
 $this->gear--;
 
}
function change_color($new_color){
 $this->color = $new_color;
 }
 
} 


What am I forgetting?

Thanks a lot!

-Nick

Your trying to call a member function of an object but not specifying the object. The method gear_up() belongs to the instance of the Bike class, bike. You should call it like this bike->gear_up(). the -> operator is similar to the dot operator in c++ and java.

Well... Duh


I was treating is as if I was trying to return a varible rather than run a method. Thanks for the help.

-Nick