PHP数组实现单链表的具体代码分享

我们今天为大家带来的时候如何运用PHP数组实现单链表结构

此类主要是依靠PHP强大的数组系统来模拟出单链表类型的数据结构。 本人完全凭借自己的 兴趣来编写此类，并未考虑其实用性，主要是给大家理解一些简单的数据结构知识，同时也训练 一下PHP中的数组运用能力。

单链表简介：

单链表是最简单的链表表示。用它来表示线性表时，每一个数据元素占用一个结点(node)。一个 结点一般由两个域组成，一个域存放数据元素data； 另一个域存放一个指向链表中下一个结点的指针link，它指出下一个结点 的开始存储地址。而最后一个结点的指针为空。单链表中数据元素之间的逻 辑关系是由结点中的指针指示的，换句话说，指针为数据元素之间的逻辑关系的映象，则逻辑上相邻的两个元素其存储的物理位置不要求紧邻，因此， 这种存储结构为非顺序映像或链式映像。当然，在PHP没有指针这个概念，但是我们可以用关联数组来模拟。

PHP数组实现单链表的代码如下：

<ol class="dp-xml">
<li class="alt"><span><strong><font color="#006699"><span class="tag"></span><span class="tag-name">php</span></font></strong><span> </span></span></li>
<li class=""><span>class LinkList   </span></li>
<li class="alt"><span>{  </span></li>
<li class=""><span>   /**  </span></li>
<li class="alt"><span>    * 成员变量  </span></li>
<li class=""><span>    * @var array    $linkList       链表数组  </span></li>
<li class="alt"><span>    * @var number   $listHeader     表头索引  </span></li>
<li class=""><span>    * @var number   $listLength     链表长度  </span></li>
<li class="alt"><span>    * @var number   $existedCounts  记录链表中出现过的元素的个数，和$listLength不同的是, 删除一  </span></li>
<li class=""><span>    *                               个元素之后，该值不需要减1，这个也可以用来为新元素分配索引。                            </span></li>
<li class="alt"><span>    */  </span></li>
<li class="">
<span>   protected  $</span><span class="attribute"><font color="#ff0000">linkList</font></span><span>  =</span><span class="attribute-value"><font color="#0000ff">array</font></span><span>();  </span>
</li>
<li class="alt">
<span>   protected  $</span><span class="attribute"><font color="#ff0000">listLength</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>;  </span>
</li>
<li class="">
<span>   protected  $</span><span class="attribute"><font color="#ff0000">listHeader</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">null</font></span><span>;  </span>
</li>
<li class="alt">
<span>   protected  $</span><span class="attribute"><font color="#ff0000">existedCounts</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>;  </span>
</li>
<li class=""><span>   /**  </span></li>
<li class="alt"><span>    * 构造函数  </span></li>
<li class=""><span>    *   构造函数可以带一个数组参数，如果有参数，则调用成员方法  </span></li>
<li class="alt"><span>    * createList将数组转换成链表，并算出链表长度.如果没有参  </span></li>
<li class=""><span>    * 数，则生成一空链表.空链表可以通过调用成员方法createList  </span></li>
<li class="alt"><span>    * 生成链表.  </span></li>
<li class=""><span>    * @access public  </span></li>
<li class="alt"><span>    * @param  array $arr 需要被转化为链表的数组  </span></li>
<li class=""><span>    */  </span></li>
<li class="alt">
<span>   public function __construct($</span><span class="attribute"><font color="#ff0000">arr</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">''</font></span><span>)  </span>
</li>
<li class=""><span>   {  </span></li>
<li class="alt">
<span>     $arr!=null&&$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>createList($arr);  </span>
</li>
<li class=""><span>   }  </span></li>
<li class="alt"><span>   /**  </span></li>
<li class=""><span>    * 生成链表的函数  </span></li>
<li class="alt"><span>    *   将数组转变成链表，同时计算出链表长度。分别赋值给成员标量  </span></li>
<li class=""><span>    * $linkList和$listLength.  </span></li>
<li class="alt"><span>    * @access public  </span></li>
<li class=""><span>    * @param  array $arr 需要被转化为链表的数组  </span></li>
<li class="alt"><span>    * @return boolean  true表示转换成功，false表示失败    </span></li>
<li class=""><span>    */  </span></li>
<li class="alt"><span>  public function createList($arr)  </span></li>
<li class=""><span>  {   </span></li>
<li class="alt"><span>   if (!is_array($arr))   </span></li>
<li class=""><span>    return false;  </span></li>
<li class="alt">
<span>   $</span><span class="attribute"><font color="#ff0000">length</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">count</font></span><span>($arr);  </span>
</li>
<li class="">
<span>   for($</span><span class="attribute"><font color="#ff0000">i</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>;$i</span><span class="tag"><strong><font color="#006699"></font></strong></span><span>$length;$i++)  </span>
</li>
<li class="alt"><span>   {     </span></li>
<li class="">
<span>       if($</span><span class="attribute"><font color="#ff0000">i</font></span><span>==$length-1)  </span>
</li>
<li class="alt"><span>       {  </span></li>
<li class=""><span>        //每个链表结点包括var和next两个索引，var表示结点值，next为下一个结点的索引  </span></li>
<li class="alt"><span>        //最后一个结点的next为null  </span></li>
<li class=""><span>        $list[$i]['var']  =$arr[$i];  </span></li>
<li class="alt"><span>        $list[$i]['next'] =null;  </span></li>
<li class=""><span>       }  </span></li>
<li class="alt"><span>       else   </span></li>
<li class=""><span>       {  </span></li>
<li class="alt"><span>        $list[$i]['var']  =$arr[$i];  </span></li>
<li class=""><span>        $list[$i]['next'] =$i+1;  </span></li>
<li class="alt"><span>       }  </span></li>
<li class=""><span>   }  </span></li>
<li class="alt">
<span>   $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span class="attribute"><font color="#ff0000">linkList</font></span><span>      =$list;  </span>
</li>
<li class="">
<span>   $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span class="attribute"><font color="#ff0000">listLength</font></span><span>    =$length;  </span>
</li>
<li class="alt">
<span>   $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span class="attribute"><font color="#ff0000">existedCounts</font></span><span> =$length;  </span>
</li>
<li class="">
<span>   $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span class="attribute"><font color="#ff0000">listHeader</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>;  </span>
</li>
<li class="alt"><span>   return true;  </span></li>
<li class=""><span>  }  </span></li>
<li class="alt"><span>  /**  </span></li>
<li class=""><span>   * 将链表还原成一维数组  </span></li>
<li class="alt"><span>   * @access public  </span></li>
<li class=""><span>   * @return array    $arr  生成的一维数组  </span></li>
<li class="alt"><span>   */  </span></li>
<li class=""><span>  public function returnToArray()  </span></li>
<li class="alt"><span>  {   </span></li>
<li class="">
<span>   $</span><span class="attribute"><font color="#ff0000">arr</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">array</font></span><span>();  </span>
</li>
<li class="alt">
<span>   $</span><span class="attribute"><font color="#ff0000">tmp</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listHeader];  </span>
</li>
<li class="">
<span>    for($</span><span class="attribute"><font color="#ff0000">i</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>;$i</span><span class="tag"><strong><font color="#006699"></font></strong></span><span>$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength;$i++)  </span>
</li>
<li class="alt"><span>   {  </span></li>
<li class=""><span>     $arr[]=$tmp['var'];  </span></li>
<li class="alt">
<span>     if ($i!=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength-1)   </span>
</li>
<li class=""><span>     {  </span></li>
<li class="alt">
<span>     $</span><span class="attribute"><font color="#ff0000">tmp</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$tmp['next']];  </span>
</li>
<li class=""><span>     }  </span></li>
<li class="alt"><span>   }  </span></li>
<li class=""><span>   return $arr;  </span></li>
<li class="alt"><span>  }  </span></li>
<li class=""><span>public function getLength()  </span></li>
<li class="alt"><span>  {  </span></li>
<li class="">
<span>          return $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength;  </span>
</li>
<li class="alt"><span>  }  </span></li>
<li class=""><span>  /**  </span></li>
<li class="alt"><span>   * 计算一共删除过多少个元素  </span></li>
<li class=""><span>   * @access public   </span></li>
<li class="alt"><span>   * @return number $count 到目前为止删除过的元素个数  </span></li>
<li class=""><span>   */  </span></li>
<li class="alt"><span>  public function getDeletedNums()  </span></li>
<li class=""><span>  {  </span></li>
<li class="alt">
<span>          $</span><span class="attribute"><font color="#ff0000">count</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts-$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength;  </span>
</li>
<li class=""><span>          return $count;  </span></li>
<li class="alt"><span>  }  </span></li>
<li class=""><span>  /**  </span></li>
<li class="alt"><span>   * 通过元素索引返回元素序号  </span></li>
<li class=""><span>   * @access protected  </span></li>
<li class="alt"><span>   * @param  $index     元素的索引号  </span></li>
<li class=""><span>   * @return $num       元素在链表中的序号  </span></li>
<li class="alt"><span>   */  </span></li>
<li class=""><span>  public function getElemLocation($index)  </span></li>
<li class="alt"><span>  {  </span></li>
<li class="">
<span>  if (!array_key_exists($index,$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList))   </span>
</li>
<li class="alt"><span>   return false;  </span></li>
<li class="">
<span>    $</span><span class="attribute"><font color="#ff0000">arrIndex</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listHeader;  </span>
</li>
<li class="alt">
<span>    for($</span><span class="attribute"><font color="#ff0000">num</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">1</font></span><span>;$</span><span class="attribute"><font color="#ff0000">tmp</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$arrIndex];$num++)  </span>
</li>
<li class=""><span>    {  </span></li>
<li class="alt">
<span>            if ($</span><span class="attribute"><font color="#ff0000">index</font></span><span>==$arrIndex)   </span>
</li>
<li class=""><span>            break;  </span></li>
<li class="alt"><span>            else   </span></li>
<li class=""><span>            {  </span></li>
<li class="alt">
<span>                    $</span><span class="attribute"><font color="#ff0000">arrIndex</font></span><span>=$tmp['next'];  </span>
</li>
<li class=""><span>            }  </span></li>
<li class="alt"><span>    }  </span></li>
<li class=""><span>    return $num;  </span></li>
<li class="alt"><span>  }  </span></li>
<li class=""><span>  /**  </span></li>
<li class="alt"><span>   * 获取第$i个元素的引用  </span></li>
<li class=""><span>   *   这个保护方法不能被外界直接访问，许多服务方法以来与次方法。  </span></li>
<li class="alt"><span>   * 它用来返回链表中第$i个元素的引用，是一个数组  </span></li>
<li class=""><span>   * @access protected  </span></li>
<li class="alt"><span>   * @param  number $i 元素的序号  </span></li>
<li class=""><span>   * @return reference 元素的引用  </span></li>
<li class="alt"><span>   */  </span></li>
<li class=""><span>  protected function &getElemRef($i)  </span></li>
<li class="alt"><span>  {  </span></li>
<li class=""><span>          //判断$i的类型以及是否越界  </span></li>
<li class="alt">
<span>          $</span><span class="attribute"><font color="#ff0000">result</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">false</font></span><span>;  </span>
</li>
<li class="">
<span>          if (!is_numeric($i)||(int)$i</span><span class="tag"><strong><font color="#006699"></font></strong></span><span>=0||(int)$i</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength)   </span>
</li>
<li class="alt"><span>          return $result;  </span></li>
<li class=""><span>   //由于单链表中的任何两个元素的存储位置之间没有固定关系，要取得第i个元素必须从  </span></li>
<li class="alt"><span>   //表头开始查找，因此单链表是非随机存储的存储结构。  </span></li>
<li class="">
<span>   $</span><span class="attribute"><font color="#ff0000">j</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>;  </span>
</li>
<li class="alt">
<span>   $</span><span class="attribute"><font color="#ff0000">value</font></span><span>=&$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listHeader];  </span>
</li>
<li class="">
<span>   while ($j</span><span class="tag"><strong><font color="#006699"></font></strong></span><span>$i-1)  </span>
</li>
<li class="alt"><span>   {  </span></li>
<li class="">
<span>           $</span><span class="attribute"><font color="#ff0000">value</font></span><span>=&$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$value['next']];  </span>
</li>
<li class="alt"><span>           $j++;  </span></li>
<li class=""><span>   }  </span></li>
<li class="alt"><span>   return $value;  </span></li>
<li class=""><span>  }  </span></li>
<li class="alt"><span>  /**  </span></li>
<li class=""><span>   * 返回第i个元素的值  </span></li>
<li class="alt"><span>   * @access public  </span></li>
<li class=""><span>   * @param  number $i     需要返回的元素的序号，从1开始  </span></li>
<li class="alt"><span>   * @return mixed  第i个元素的值  </span></li>
<li class=""><span>   */  </span></li>
<li class="alt"><span>  public function getElemvar($i)  </span></li>
<li class=""><span>  {  </span></li>
<li class="alt">
<span>    $</span><span class="attribute"><font color="#ff0000">var</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>getElemRef($i);  </span>
</li>
<li class=""><span>    if ($var!=false)   </span></li>
<li class="alt"><span>    {  </span></li>
<li class=""><span>            return $var['var'];  </span></li>
<li class="alt"><span>    }  </span></li>
<li class=""><span>    else return false;  </span></li>
<li class="alt"><span>  }  </span></li>
<li class=""><span>  /**  </span></li>
<li class="alt"><span>   *   在第i个元素之后插入一个值为var的新元素  </span></li>
<li class="">
<span>   *   i的取值应该为[1,$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength]，如果</span><span class="attribute"><font color="#ff0000">i</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">0</font></span><span>，表示在表的最前段插入，  </span>
</li>
<li class="alt">
<span>   * 如果</span><span class="attribute"><font color="#ff0000">i</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength，表示在表的末尾插入,插入的方法为，将第$i-1个元素  </span>
</li>
<li class=""><span>   * 的next指向第$i个元素，然后将第$i个元素的next指向第$i+1个元素，这样就实现了插入  </span></li>
<li class="alt"><span>   * @access public  </span></li>
<li class=""><span>   * @param  number $i   在位置i插入新元素  </span></li>
<li class="alt"><span>   * @param  mixed  $var 要插入的元素的值   </span></li>
<li class=""><span>   * @return boolean  成功则返回true,否则返回false  </span></li>
<li class="alt"><span>   */  </span></li>
<li class=""><span>  public function insertIntoList($i,$var)  </span></li>
<li class="alt"><span>  {  </span></li>
<li class="">
<span>          if (!is_numeric($i)||(int)$i</span><strong><font color="#006699"><span class="tag"><span class="tag-name">0</span></span></font></strong><span>||(int)$i</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength)   </span>
</li>
<li class="alt"><span>          return false;  </span></li>
<li class="">
<span>          if ($</span><span class="attribute"><font color="#ff0000">i</font></span><span>==0)   </span>
</li>
<li class="alt"><span>          {  </span></li>
<li class=""><span>          //如果$i-0，则在表最前面添加元素，新元素索引为$listLength，这样是确保不会  </span></li>
<li class="alt"><span>          //覆盖原来的元素，另外这种情况需要重新设置$listHeader  </span></li>
<li class="">
<span>              $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts]['var'] =$var;  </span>
</li>
<li class="alt">
<span>              $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts]['next']=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listHeader;  </span>
</li>
<li class="">
<span>              $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span class="attribute"><font color="#ff0000">listHeader</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts;  </span>
</li>
<li class="alt">
<span>              $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength++;  </span>
</li>
<li class="">
<span>              $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts++;  </span>
</li>
<li class="alt"><span>              return true;          </span></li>
<li class=""><span>          }  </span></li>
<li class="alt">
<span>   $</span><span class="attribute"><font color="#ff0000">value</font></span><span>=&$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>getElemRef($i);  </span>
</li>
<li class="">
<span>   $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts]['var'] =$var;  </span>
</li>
<li class="alt">
<span>   $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts]['next']=($</span><span class="attribute"><font color="#ff0000">i</font></span><span>==$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength?null:$value['next']);  </span>
</li>
<li class="">
<span>   $value['next']=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts;  </span>
</li>
<li class="alt">
<span>   $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength++;  </span>
</li>
<li class="">
<span>   $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts++;  </span>
</li>
<li class="alt"><span>   return true;  </span></li>
<li class=""><span>  }  </span></li>
<li class="alt"><span>  /**  </span></li>
<li class=""><span>   * 删除第$i个元素  </span></li>
<li class="alt">
<span>   *   删除第$i个元素，该元素为取值应该为[1，$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength],需要注意，删除元素之后，  </span>
</li>
<li class="">
<span>   * $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength减1,而$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>existedCounts不变。删除的方法为将第$i-1个元素的  </span>
</li>
<li class="alt"><span>   * next指向第$i+1个元素，那么第$i个元素就从链表中删除了。  </span></li>
<li class=""><span>   * @access public  </span></li>
<li class="alt"><span>   * @param  number $i 将要被删除的元素的序号  </span></li>
<li class=""><span>   * @return boolean    成功则返回true,否则返回false  </span></li>
<li class="alt"><span>   */  </span></li>
<li class=""><span>  public function delFromList($i)  </span></li>
<li class="alt"><span>  {  </span></li>
<li class="">
<span>          if (!is_numeric($i)||(int)$i</span><span class="tag"><strong><font color="#006699"></font></strong></span><span>=0||(int)$i</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength)   </span>
</li>
<li class="alt"><span>          return false;  </span></li>
<li class="">
<span>    if ($</span><span class="attribute"><font color="#ff0000">i</font></span><span>==1)   </span>
</li>
<li class="alt"><span>    {  </span></li>
<li class=""><span>    //若删除的结点为头结点，则需要从新设置链表头  </span></li>
<li class="alt">
<span>      $</span><span class="attribute"><font color="#ff0000">tmp</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listHeader];  </span>
</li>
<li class="">
<span>      unset($this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listHeader]);  </span>
</li>
<li class="alt">
<span>      $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span class="attribute"><font color="#ff0000">listHeader</font></span><span>=$tmp['next'];  </span>
</li>
<li class="">
<span>      $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength--;  </span>
</li>
<li class="alt"><span>      return true;  </span></li>
<li class=""><span>    }  </span></li>
<li class="alt"><span>    else   </span></li>
<li class=""><span>    {  </span></li>
<li class="alt">
<span>     $</span><span class="attribute"><font color="#ff0000">value</font></span><span>    =&$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>getElemRef($i);  </span>
</li>
<li class="">
<span>     $</span><span class="attribute"><font color="#ff0000">prevValue</font></span><span>=&$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>getElemRef($i-1);  </span>
</li>
<li class="alt">
<span>     unset($this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>linkList[$prevValue['next']]);  </span>
</li>
<li class=""><span>     $prevValue['next']=$value['next'];  </span></li>
<li class="alt">
<span>     $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>listLength--;  </span>
</li>
<li class=""><span>     return true;  </span></li>
<li class="alt"><span>    }  </span></li>
<li class=""><span>  }  </span></li>
<li class="alt"><span>/**  </span></li>
<li class=""><span>  * 对链表的元素排序  </span></li>
<li class="alt"><span>  *  谨慎使用此函数，排序后链表将被从新初始化，原有的成员变量将会被覆盖  </span></li>
<li class=""><span>  * @accse public  </span></li>
<li class="alt">
<span>  * @param  boolean  $</span><span class="attribute"><font color="#ff0000">sortType</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">'true'</font></span><span> 排序方式,true表示升序，false表示降序，默认true     </span>
</li>
<li class=""><span>  */  </span></li>
<li class="alt">
<span>public function listSort($</span><span class="attribute"><font color="#ff0000">sortType</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">'true'</font></span><span>)  </span>
</li>
<li class=""><span>{  </span></li>
<li class="alt"><span>   //从新修改关联关系可能会更复杂，所以我选择先还原成一维数组，然后对数组排序，然后再生成链表  </span></li>
<li class="">
<span>   $</span><span class="attribute"><font color="#ff0000">arr</font></span><span>=$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>returnToArray();  </span>
</li>
<li class="alt"><span>   $sortType?sort($arr):rsort($arr);  </span></li>
<li class="">
<span>   $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>createList($arr);  </span>
</li>
<li class="alt"><span>}  </span></li>
<li class=""><span>}  </span></li>
<li class="alt">
<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span> </span>
</li>
</ol>

上面这段代码就是PHP数组实现单链表的源码编写，希望对大家有所帮助。