Котик Антон

Since PHP-5.2.1 we have an artifact of PHP-6 in the engine means we can define binary strings but such definitions haven't any effect.
<...>
That’s because PHP 6 was going to have Unicode strings by default, alongside binary strings (to PHP 5 and 7, just “strings”). These “binary strings” are just strings.

$a = array('orange', 'apple', 'banana', 'pine');

$len  = count($a);
$list = array();

for ($i = 1; $i < (1 << $len); $i++) {
    $c = [];
    for ($j = 0; $j < $len; $j++) {
    	if ($i & (1 << $j)) {
            $c[] = $a[$j];
    	}
    }
    $list[] = $c;
}

print_r($list);

$obj = (object) [
    'a' => function(){ return 1; },
    'b' => (object) [
        'ba' => function(){ return 2; },
        'bb' => (object) [
            'bba' => function(){ return 3; }
        ]
    ]
];
call_user_func($obj->a);
call_user_func($obj->b->ba);
call_user_func($obj->b->bb->bba);

$obj->a->__invoke();
$obj->b->ba->__invoke();
$obj->b->bb->bba->__invoke();

for ($a = 0, $count = count($games_list); $a != $count; $a++) {
    if (isset($games_list[$a]['status'])) unset($games_list[$a]);
}

foreach ($games_list as $a => $game) {
    if (isset($game['status'])) unset($games_list[$a]);
}

$games_list = array_filter($games_list, function ($game) {
    return !isset($game['status']);
});

if (getBrowser() !== 'Chrome') {
    // редирект...
}

$browser = new Browser();
if ($browser->getBrowser() !== Browser::BROWSER_CHROME) {
    // редирект...
}

$result = preg_replace_callback('/\d/', function ($matches) use ($db) {
    // Запрос к базе данных $db
    return $replace;
}, '1 2 3');

function my_array_rand($array) {
    static $i = 0;
    $keys = array_keys($array);
    return $keys[$i++ % count($array)];
}

for ($i = 0; $i < 3; $i++) {
	var_dump($GLOBALS['test'][my_array_rand($GLOBALS['test'])]);
}

usort($data[0][1], function($a, $b) {
    return strcmp($a[4] . $a[0], $b[4] . $b[0]);
});