1.常见方法分为迭代和递归,迭代是从头到尾,递归是从尾到头

2.设置两个指针,old和new,每一项添加在new的后面,新链表头指针指向新的链表头

3.old->next不能直接指向new,而是应该设置一个临时指针tmp,指向old->next指向的地址空间,保存原链表数据,然后old->next指向new,new往前移动到old处new=old,最后old=tmp取回数据

while(old!=null){

　　tmp=old->next

　　old->next=new

　　new=old

　　old=tmp

}

     next=null;//头结点for($i=1;$i<=10;$i++){        $node=new Node();        $node->data="aaa{
   $i}";//创建新结点$node        $node->next=$linkList->next;//$node->next指向头结点->next        $linkList->next=$node;//头结点->next指向$node}var_dump($linkList);function ReverseList($pHead){        $old=$pHead->next;//跳过头结点        $new=null;        $tmp=null;        //反转过程        while($old!=null){                $tmp=$old->next;                $old->next=$new;                $new=$old;                $old=$tmp;        }           //给新链表加个头结点        $newHead=new Node();        $newHead->next=$new;        var_dump($newHead);}ReverseList($linkList);

object(Node)#1 (2) {
      ["data"]=>  NULL  ["next"]=>  object(Node)#11 (2) {
        ["data"]=>    string(5) "aaa10"    ["next"]=>    object(Node)#10 (2) {
          ["data"]=>      string(4) "aaa9"      ["next"]=>      object(Node)#9 (2) {
            ["data"]=>        string(4) "aaa8"        ["next"]=>        object(Node)#8 (2) {
              ["data"]=>          string(4) "aaa7"          ["next"]=>          object(Node)#7 (2) {
                ["data"]=>            string(4) "aaa6"            ["next"]=>            object(Node)#6 (2) {
                  ["data"]=>              string(4) "aaa5"              ["next"]=>              object(Node)#5 (2) {
                    ["data"]=>                string(4) "aaa4"                ["next"]=>                object(Node)#4 (2) {
                      ["data"]=>                  string(4) "aaa3"                  ["next"]=>                  object(Node)#3 (2) {
                        ["data"]=>                    string(4) "aaa2"                    ["next"]=>                    object(Node)#2 (2) {
                          ["data"]=>                      string(4) "aaa1"                      ["next"]=>                      NULL                    }                  }                }              }            }          }        }      }    }  }}object(Node)#12 (2) {
      ["data"]=>  NULL  ["next"]=>  object(Node)#2 (2) {
        ["data"]=>    string(4) "aaa1"    ["next"]=>    object(Node)#3 (2) {
          ["data"]=>      string(4) "aaa2"      ["next"]=>      object(Node)#4 (2) {
            ["data"]=>        string(4) "aaa3"        ["next"]=>        object(Node)#5 (2) {
              ["data"]=>          string(4) "aaa4"          ["next"]=>          object(Node)#6 (2) {
                ["data"]=>            string(4) "aaa5"            ["next"]=>            object(Node)#7 (2) {
                  ["data"]=>              string(4) "aaa6"              ["next"]=>              object(Node)#8 (2) {
                    ["data"]=>                string(4) "aaa7"                ["next"]=>                object(Node)#9 (2) {
                      ["data"]=>                  string(4) "aaa8"                  ["next"]=>                  object(Node)#10 (2) {
                        ["data"]=>                    string(4) "aaa9"                    ["next"]=>                    object(Node)#11 (2) {
                          ["data"]=>                      string(5) "aaa10"                      ["next"]=>                      NULL                    }                  }                }              }            }          }        }      }    }  }}