accessing a variable from procedural through a class

[1internet]

I am trying to access a variable through a class, and can't work out how to this.

class test {

	function method() {
		if (isset({$testing})) {
			echo {$testing};
		}
	}

}

$testing = 'it works';
$thetest = new test;
$thetest->method();

 

Is this even possible, or have I got very confused?

[Jessica]

You'd have to pass it to the method.

[KevinM1]

It's both possible, and you're very confused.

 

In PHP, methods and functions are essentially the same thing (notice how they start with the function keyword).  How do you pass a variable to a function?  Through its argument list.  The same thing applies here:

 

 

class test
{
    public function method($x)
    {
        echo $x;
    }
}
 
$testing = 'it works';
$test = new test;
$test->method($testing);

 

EDIT: Note that while methods and functions are essentially the same mechanically, OOP is NOT merely placing a bunch of functions in a class and calling it a day.

Edited March 17, 2013 by KevinM1

[1internet]

Ok so what if the variable may not be set?

class test
{
    public function method($x=null)
    {
       if(isset($x)) echo $x;
    }
}
 
$testing = 'it works';
$test = new test;
$test->method($testing);

Would that work?

Edited March 17, 2013 by 1internet

[KevinM1]

Try it and see.

 

Don't be afraid to write little test scripts.  You'll learn more that way than asking us whether or not something relatively simple can work.

[1internet]

Yea, I do, but sometimes I just like to make sure there isn't some standard or much simpler way to do things. It didn't work though.

So I think this is the best way

class test {

	function method($x) {
			echo $x;
	}

}

$thetest = new test;
if (isset($testing)) $thetest->method($testing);

Edited March 17, 2013 by 1internet

[Strider64]

<?php


class Test {

    public $greetings; // Public Variable can be used anywhere


    public function my_world($x) // Global Method

    {

        echo "Good Afternoon, " . $x . "!<br />";

        return $this->greetings = "Have a Great Day " . $x . "!<br />";  // returns a varialble to the calling method

    }


}


$thetest = new Test; // Creat a new instance

$goodbye = $thetest->my_world("Kevin"); // Call the Method

echo $goodbye; //display it.

?>

[KevinM1]

 

<?php

class Test {
    public $greetings; // Public Variable can be used anywhere

    public function my_world($x) // Global Method
    {
        echo "Good Afternoon, " . $x . "!<br />";
        return $this->greetings = "Have a Great Day " . $x . "!<br />";  // returns a varialble to the calling method
    }

}

$thetest = new Test; // Creat a new instance
$goodbye = $thetest->my_world("Kevin"); // Call the Method
echo $goodbye; //display it.
?>

 

1. Public does not mean global.

2. Methods/functions really shouldn't echo and return.