PHP Taskbook Level 10.8

Write a code that will check the complexity of the password. Come up with the complexity criteria yourself.

Given an array. Display all possible permutations of the elements of this array.

Given a form with two inputs. When the form is submitted, output a list of ul all amicable numbers from the interval specified by the input values.

Let the file store JSON of cities of the following type:

{
	[
		"id": "1",
		"city": "city1",
		"country": "country1",
	],
	[
		"id": "2",
		"city": "city2",
		"country": "country1",
	],
	[
		"id": "3",
		"city": "city3",
		"country": "country2",
	]
}

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

{
	[
		"id": "1",
		"country": "country1",
	],
	[
		"id": "2",
		"country": "country2",
	],
	[
		"id": "3",
		"country": "country3",
	]
}

Write a script that will substitute id countries instead of countries:

{
	[
		"id": "1",
		"city": "city1",
		"country_id": "1",
	],
	[
		"id": "2",
		"city": "city2",
		"country_id": "1",
	],
	[
		"id": "3",
		"city": "city3",
		"country_id": "2",
	]
}