why $this->module = new $loadModule;

[wolf73]

LIttle of topic. I got this code from php manual.

<?php

class mainClass
{
/*
* Class loading function.
*
*
*
*
*/

var $module;

function LoadClass($loadModule)
{
$this->module = new $loadModule; // this is much better
}

function RunFunction($FunctionName)
{
$this->module->$FunctionName();
}

function ListFunctions()
{

}

// function out()
//{
// $this->module->out();
// }
}

class subclass
{
function out()
{
echo "Worked";
}

function NewFunction()
{
echo "<br>Good Lord<br>";
}

function ThirdFunction()
{
echo "<br>eh....<br>";

}
}

echo "Start of class manulapations<br>";
//$loadModule = new subclass;
$mainclass=new mainClass;
$mainclass->LoadClass("subclass");
//$mainclass->out();
$mainclass->RunFunction('NewFunction');
//$mainclass->ThirdFunction();
echo "End of class manulapation<br>";
?>

*******

I don't understand what he is doing in first function

$this->module = new $loadModule; // this is much

and second function

$this->module->$FunctionName();

 

[AdaHacker]

PHP allows you to use string variables to create new objects or call functions rather than writing out the function or class name. That's what these examples are doing. The object that's created and the function that's called depends on the value of the variable. So, for example, this

$loadModule = "ClassFoo";
$FunctionName = "funcBar";
$this->module = new $loadModule;
$this->module->$FunctionName();

is equivalent to this

$this->module = new ClassFoo;
$this->module->funcBar();

 

[wolf73]

thanks a lot you explained it really well