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<?php $a = [ 'a' => [ 'a1' => 'a1', 'a2' => 'a2', 'a3' => 'a3', ], 'b' => [ 'b1' => 'b1', 'b2' => 'b2', 'b3' => 'b3', ], ]; $it = new RecursiveIteratorIterator(new ArrayIterator($a)); $b = []; foreach ($it as $key => $value) { $b[$key] = $value; } var_dump($b);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught InvalidArgumentException: An instance of RecursiveIterator or IteratorAggregate creating it is required in /in/DdODR:16 Stack trace: #0 /in/DdODR(16): RecursiveIteratorIterator->__construct(Object(ArrayIterator)) #1 {main} thrown in /in/DdODR on line 16
Process exited with code 255.

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