note 113689 deleted from language.oop5.static by cmb
| From: | cmb@php.net | Date: | Sun, 01 Sep 2019 07:33:13 +0000 |
| Subject: | note 113689 deleted from language.oop5.static by cmb | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-212058@lists.php.net to get a copy of this message | ||
Note Submitter: desmatic
----
Don't use GLOBALS in classes (or anywhere really), use static variables instead. They're
better. They can do everything a GLOBAL can and they can be protected by accessor functions so
they'll never get clobbered.
class foo {
private static $_private = null;
public function get() {
if (self::$_private === null) {
self::$_private = new stdClass();
}
return self::$_private;
}
}
class bar extends foo {
}
function scope_foo() {
$f = new foo();
$f->get()->name = "superdude";
}
function scope_bar() {
$b = new bar();
$b->get()->description = "an object reference test";
}
scope_foo();
scope_bar();
$my = new bar();
foreach ($my->get() as $key => $value) {
echo "{$key} => {$value}\n";
}
outputs:
name => superdude
description => an object reference test