[ 0 => 'first=value&arr[]=foo+bar&arr[]=baz', 1 => '$arr',]
[ 'result' => [ 'arr' => [ 'first' => 'value', 'arr' => [ 0 => 'foo bar', 1 => 'baz', ], ], ], 'php_version' => '7.1.33 Linux x86_64',]