do you need to use global?
IMO you should use just 1 global variable, thats is what I call "entry point"
My scripts looks like...
require_once 'loader.php';
Loader::registerAutoload();
$foo = new Foo();
$foo->doStuff();
This way you can develop faster and do maintenance better avoiding
problems with third-party.
Here you have some rules for remember how to access
you want a $var from outside and you are outside an object or
function? => use the $var
you want a $var from outside you are inside an object or function? =>
global $var o $GLOBALS['vars'] (better to pass it as arg)
you want a $var from an object and you are inside the same object? =>
use $this->var (better $this->getVar() )
you want a $var from an object and you are inside other object? => use
$object->getVar() or Class::getVar()
It is a good practice to declare the object members as "protected" and
provide s/getters for each member (when your design allow it). Also
you can overload by using the __get, __set and __call
It is really easy to make an "automagic" object
Class AutoMagic
{
protected $_vars = array();
public/*mixed*/
function __get(/*string*/$name)
{
return isset( $this->{ $name } ) ? $this->_vars[ strtolower($name) ] : null;
}
public/*mixed*/
function __set(/*string*/$name,/*mixed*/$value)
{
return $this->_vars[ strtolower($name) ] = $value;
}
public/*boolean*/
function __isset(/*string*/$name)
{
return array_key_exists( strtolower($name), $this->_vars );
}
public/*void*/
function __unset(/*string*/$name)
{
if( isset( $this->{ $name } ))
unset( $this->_vars[ strtolower($name) ] );
}
public/*mixed*/
function __call(/*string*/$method,array $args)
{
$type = strtolower( substr( $method, 0, 3 ) );
$property = substr( $method, 3 );
switch( $type )
{
case 'get':
return $this->{ $property };
case 'set':
if( !array_key_exists(0, $args) )
trigger_error( 'Bad call in ' . get_class($this) . '::' . $method
.'. Method needs an argument' );
return $this->{ $property } = $args[0];
case 'has':
return isset( $this->{ $property } );
case 'del':
unset( $this->{ $property } );
return;
}
trigger_error( 'Bad call in ' . get_class($this) . '::' . $method );
}
}
On Tue, Jul 14, 2009 at 10:01 AM, Darren
Karstens<darrenkarstens@xxxxxxxxxxxxxx> wrote:
>> Oh and if one class uses methods in another class .... do I instansiate a
>> new object of the other class .... I have seen use of OtherClass::Method
>> .... is this better method of $obj = new OtherClass() use
>
> The :: is used to access static methods of a class. Static methods can
> be used without creating an instance of the class because they dont
> use any of the classes member variables.
> For example say you have a class with a function for calculating the
> area of a rectangle:
> class SomeMathFunctions {
> public function calculateRectangle($width, $height) {
> return $width*$height;
> }
> }
>
> To use this function you would need to first create an instance of the
> class then call the method using the normal -> :
> $funcs = new SomeMathFunctions();
> $area = $funcs->calculateRectange(10,15);
>
> But if you create the function as static by using " public static
> function calculateRectangle($width, $height) { "
> then you can access the method by using just 1 call:
> $area = SomeMathFunctions::calculateRectange(10,15);
>
> So for creating utility functions its better to use static methods
> since you dont get the overhead of creating a new instance of the
> class.
>
> --
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>
>
--
Martin Scotta
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