<?php

	$result3 = [
		"AUTHOR" => array (
			array (
				"tolkin@yandex.ru" => "Джон Р. Р. Толкин",
				"email" => "tolkin@yandex.ru",
				"date" => "1892"
			),
			array (
				"zuskind@gmail.com" => "Патрик Зюскинд",
				"email" => "zuskind@gmail.com",
				"date" => "1949"
			),
			array (
				"rouling@mail.ru" => "Джоан Роулинг",
				"email" => "rouling@mail.ru",
				"date" => "1965"
			),
		),
		"BOOK" => array (
			array (
				"Властелин колец",
				"tolkin@yandex.ru"
			),
			array (
				"Хоббит",
				"tolkin@yandex.ru"
			),
			array (
				"Гарри Поттер и кубок огня",
				"rouling@mail.ru"
			),
			array (
				"Гарри Поттер и дары смерти",
				"rouling@mail.ru"
			)
		)
	];

	header("Content-Type: text/plain");

	$authors = [];

	foreach ($result3['AUTHOR'] as $a) {
		$a['name'] = $a[$a['email']];

		unset($a[$a['email']]);

		$authors[$a['email']] = $a;
	}

	print_r($authors);

	$books = [];

	foreach ($result3['BOOK'] as $b) {
		$b['title'] = $b[0];
		$b['author_email'] = $b[1];

		unset($b[0]);
		unset($b[1]);

		$books[] = $b;
	}

	print_r($books);

	foreach ($books as $book) {
		$author = $authors[$book['author_email']];

		echo("Книга «".$book['title']."», её написал ".$author['name']." в ".$author['date']." году (email: ".$author['email'].").\r\n");
	}