PHP Taskbook Level 9.8

Let the site page be accessed with one of the URLs, in which the user's language is specified:

http://test.com/ru/dir1/dir2/ http://test.com/en/dir1/dir2/

In response to such an appeal, provide the text in the appropriate language:

$arr = [
	'ru' => 'text word version document book',
	'en' => 'text',
];

Given an arbitrary two-dimensional array:

[
	[11, 12, 13, 14, 15],
	[21, 22, 23, 24, 25],
	[31, 32, 33, 34, 35],
	[41, 42, 43, 44, 45],
	[51, 52, 53, 54, 55],
]

Swap the two given rows:

[
	[51, 52, 53, 54, 55],
	[21, 22, 23, 24, 25],
	[31, 32, 33, 34, 35],
	[41, 42, 43, 44, 45],
	[11, 12, 13, 14, 15],
]

Let the file store JSON of countries in the following format:

{
	[
		"id": "3",
		"country": "country1",
	],
	[
		"id": "7",
		"country": "country2",
	],
	[
		"id": "9",
		"country": "country3",
	]
}

Output these countries as the following select:

<select>
	<option value="3">country1</option>
	<option value="7">country2</option>
	<option value="9">country3</option>
</select>