<?php class Foo { public function doStuff($number) { return $this->doStuffInternal($number, []); } public function doStuffInternal($number, array $numbers) { if ($number > 0) { $numbers[] = $number; return $this->doStuffInternal($number - 1, $numbers); } return $numbers; } } $foo = new Foo(); var_dump($foo->doStuff(10)); // no problem here var_dump($foo->doStuffInternal(10, ['herp!'])); // ah shit
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