ZjFree-自由自在

摘要： 猜猜一下PHP输出什么？$list = array();$list[] = 'a1';$list[] = 'a2';$list[] = 'a3';foreach ($list as &$r){ //$r['vv'] = 'a';}//unset($r);foreach ($list as $r){ echo $r;}答案是：a1a2a2郁闷啊。数组重新查找时，数组的最后两项就会指向同一个值。官方的foreach说明http://www.php.net/manual/zh/control-structures 阅读全文