JasonBao

摘要： $list = array('a','b','c','d');foreach ($list as $key => $value) { if($key == 0){ print_r('第一个'); } if($key == count($list)-1){ print_r('最后一个'); }}不知道效率如何? 留存$list = array('a', 'b', 'c','d');foreach($list as $k=>$v 阅读全文