3. 写出如下程序的输出结果

$test = ‘aaaaaa’;

$abc = & $test;

unset($test);

echo $abc;//’aaaaaa’

?>

4. 写出如下程序的输出结果

function get_count(){

static $count = 0;

return $count++;

}

echo $count; //5

++$count;

echo get_count();//0

echo get_count();//1

?>