NYCPHP Meetup

[Flavio daCosta]

Reading some interesting articles on http://phppatterns.com/ I came
across the following some code that has me scratching my head...

Can anyone explain why the code below works!? (in php4 and php5)  And is
this simply an undocumented _side effect_, or is it intentional (from
the php developers)?

1) Per the php manual, you can't use $this in static functions.
2) How is the SomeClass property $errorMsg accessed within the Debug class?

Example code from
<http://www.phppatterns.com/index.php/article/articleview/15/1/1/>


<?php
class Debug {
    function display () {
        echo ($this->errorMsg);
    }
}

class SomeClass {
    var $errorMsg='This is an error message';
    function someFunction () {
        if ( DEBUG == 1 ) {
            Debug::display();
        }
    }
}

define ('DEBUG',1);
$someClass= &new SomeClass;
$someClass->someFunction(); // Outputs: "This is an error message"
?>


Thanks,
Flavio