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_get and _set are new features to php5. when you use $obj->propertyName if the property was not defined in the class like :
| <?php
private $propertyName;
?> | |
then it get's added to the $properties property, which is an array.
so if i do
| <?php
$test->MyProp = "testing";
?> | |
and there is not a $MyProp; defined in the class then it pushes it to the properties array like so
| <?php
array (
'MyProp' => "testing",
);
?> | |
also when i do :
| <?php
echo $test->MyProp;
?> | |
because there is not a property named MyProp defined it checks the properties array for the value.
these are some nice functions, if you have never read about them this will show you an easy way to keep a site configuration or something else useful :
| <?php
class Test {
var $properties;
function __set($property_name, $val) {
$this->properties[$property_name] = $val;
}
function __get($property_name) {
if(isset($this->properties[$property_name])) {
return($this->properties[$property_name]);
} else {
return(NULL);
}
}
} | |
Usage Example
| <?php
//There's the class now let's see it in use
$t = new Test();
$t->MyProp = "Property1";
echo $t->MyProp;
/*
when you print_r the object you will see these results
Test Object
(
[properties] => Array
(
[MyProp] => Property1
)
)
*/
?> | |
notice how MyProp was turned into an array key Maybe now you can see how usefull these 2 functions really are ;)
Combine this with the code example i did about Singleton Patterns and PHP5 and you have a good start to a nice object design. |
|
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