[ 0 => [ 'a' => 'green', 0 => 'red', 1 => 'blue', 2 => 'red', ], 1 => [ 'b' => 'green', 0 => 'yellow', 1 => 'red', ],]
[ 'result' => [ 'array' => [ 1 => 'blue', ], ], 'php_version' => '7.1.33 Linux x86_64',]