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<?php class ServiceLocator { public function __get($name) { echo __METHOD__ . " called.\n"; if ($name == 'a') { return new A(); } else { return null; } } public function __isset($name) { echo __METHOD__ . " called.\n"; if ($name == 'a') { return true; } else { return false; } } } class A { public function __get($name) { echo __METHOD__ . " called.\n"; return 'a'; } public function __isset($name) { echo __METHOD__ . " called.\n"; return true; } } $s = new ServiceLocator; isset($s->a->name); echo "---\n"; isset($s->b->name);
Output for git.master, git.master_jit, rfc.property-hooks
ServiceLocator::__isset called. ServiceLocator::__get called. A::__isset called. --- ServiceLocator::__isset called.

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