<?php
$marks = array();
$marks['math'] = 5;
$marks['literature'] = 4;
$marks['physics'] = 2;
$weather = array(5,12,15,34);
$numberofDays = count($weather);
echo "Всего {$numberofdays} элементов";
$user = array(
	'name' => 'anonymous',
	'email' => 'dobrokun@2ch.so',
	'postCount' => 154
);

$users = array(
	'user1' => array(
		'name' => 'anonymous',
		'email' => 'dobrokun@2ch.so'
		),
		'user2' => array(
		'name' => 'evil',
		'email' => 'zlokun@2ch.so'
		)
);
var_dump($weather);
var_dump($user);
echo "Погода: 1-й день {$weather[0]} град., 2-й день {$weather[1]} град. ...\n";
echo "Данные юзера: имя={$user['name']}, email={$user['email']}\n";