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<?php class NumberReturner { private $nums; public function __construct($nums) { $this->nums = $nums; } public function resolve() { return $this->nums; } } $objs = [new NumberReturner([1, 2, 3, 4]), new NumberReturner([1, 2, 5, 6]), new NumberReturner([1, 2, 6])]; $initial = array_shift($objs)->resolve(); $result = array_reduce($objs, function($result, $obj) { return array_intersect($result, $obj->resolve()); }, $initial); var_dump($result);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> int(1) [1]=> int(2) }

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