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<?php $arr = [ 'b1' => '0000', 'b2' => '1010', 'b3' => '1011', 'b4' => '1101', ]; $arr = array_values($arr); // turn into indexed array $bits = strlen($arr[0]); // get length (# bits) $response = []; for ($i = 0; $i < $bits; $i++) { foreach ($arr as $value) { $response[$i][] = $value[$i]; // store } } print_r($response);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [0] => 0 [1] => 1 [2] => 1 [3] => 1 ) [1] => Array ( [0] => 0 [1] => 0 [2] => 0 [3] => 1 ) [2] => Array ( [0] => 0 [1] => 1 [2] => 1 [3] => 0 ) [3] => Array ( [0] => 0 [1] => 0 [2] => 1 [3] => 1 ) )

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