Closures - http://php.net/closures

<?php
$getClosure = function($v) {
    return function() use($v) {
        echo "Hello World: $v!\n";
    };
};

$closure = $getClosure(2);
$closure();
?>
Output
Hello World: 2!

Namespaces - http://php.net/namespaces

<?php
// foo.php
namespace foo;

class bar {
  function __construct() {
    echo get_called_class();
  }
}
?>
Using namespaced code
<?php
require './foo.php';
use foo\bar as b;
$a = new b;
?>
Output
foo\bar

Late Static Binding - http://php.net/lsb

<?php
class A {
    public static function who() {
        echo __CLASS__;
    }
    public static function test() {
         self::who(); // Normal class resolution
         static::who(); // LSB
    }
}

class B extends A {
    public static function who() {
         echo __CLASS__;
    }
}

B::test();
?>
Output
AB
get_called_class
<?php
abstract class Singleton {
    private static $instances = array();
    final public static function getInstance() {
        $className = get_called_class();
        if(!isset(self::$instances[$className])) {
            self::$instances[$className] = new $className();
        }
        return self::$instances[$className];
    }
}

class foo extends Singleton { }
class bar extends Singleton { }

$a = foo::getInstance();
$b = foo::getInstance();
$c = bar::getInstance();

echo '<pre>';
var_dump($a);
var_dump($b);
var_dump($c);
echo '</pre>';
?>
Output
object(foo)#344 (0) {
}
object(foo)#344 (0) {
}
object(bar)#343 (0) {
}

NOWDOC - http://php.net/nowdoc

<?php
echo <<< 'EOB'
NOWDOC is to HEREDOC as single quoted $trings are\n
to double quoted $trings in PHP.
EOB;
?>
Output
NOWDOC is to HEREDOC as single quoted $trings are\n to double quoted $trings in PHP.

Ternary Shortcut

<?php
echo true ?: 'Hello';
echo false ?: 'World';
?>
Output
1World

goto - http://php.net/goto

<?php
function foo() {
   for($i=0, $j=1; $i<10; $i++) {
       while($j++) {
           if($j == 5) {
               goto end;
           }
       }
   }
end:
   // run cleanup code
}
?>

DateInterval/DatePeriod

<?php
$db = new DateTime('2008-12-31');
$de = new DateTime('2009-12-31');
$di = DateInterval::createFromDateString('third tuesday of next month');
$dp = new DatePeriod($db, $di, $de, DatePeriod::EXCLUDE_START_DATE);
foreach($dp as $dt) {
   echo $dt->format("F jS\n") . "<br>\n";
}
?>
Output
January 20th
February 17th
March 17th
April 21st
May 19th
June 16th
July 21st
August 18th
September 15th
October 20th
November 17th
December 15th