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<?php class FooBar { public function __construct($a, $b) { parent::__construct($a, $b); } } class BarFoo { public function __construct($a, $b) { parent::__construct($a, 'XML', $b); } } class Foo { public function export($a, $b = null) { return parent::export($a, $b); } } class Bar { public function export($a, $b = null) { return parent::export($a); } } |