php5.6の特徴について語る記事【概要】

const A = 2;
const B = A + 1;
class C
{
    const STR = "hello";
    const STR2 = self::STR + ", world";
}

function func($arg = C::STR2)

function add(...$args)
{
    $result = 0;
    foreach($args as $arg)
        $result += $arg;
    return $result;
}

$arr = [2, 3];
add(1, ...$arr);

// 结果为 6

namespace Name\Space {
    const FOO = 42;
    function f() { echo __FUNCTION__."\n"; }
}
namespace {
    use const Name\Space\FOO;
    use function Name\Space\f;
    echo FOO."\n";
    f();
}