本文实例讲述了PHP实现链表的定义与反转功能。分享给大家供大家参考,具体如下:
PHP定义链表及添加、移除、遍历等操作:
<?phpclass Node{ private $Data;//节点数据 private $Next;//下一节点 public function setData($value){ $this->Data=$value; } public function setNext($value){ $this->Next=$value; } public function getData(){ return $this->Data; } public function getNext(){ return $this->Next; } public function __construct($data,$next){ $this->setData($data); $this->setNext($next); }}class LinkList{ private $header;//头节点 private $size;//长度 public function getSize() { $i=0; $node=$this->header; while($node->getNext()!=null) { $i++; $node=$node->getNext(); } return $i; } public function setHeader($value){ $this->header=$value; } public function getHeader(){ return $this->header; } public function __construct(){ header("content-type:text/html; charset=utf-8"); $this->setHeader(new Node(null,null)); } /** *@author MzXy *@param $data--要添加节点的数据 * */ public function add($data) { $node=$this->header; while($node->getNext()!=null) { $node=$node->getNext(); } $node->setNext(new Node($data,null)); } /** *@author MzXy *@param $data--要移除节点的数据 * */ public function removeAt($data) { $node=$this->header; while($node->getData()!=$data) { $node=$node->getNext(); } $node->setNext($node->getNext()); $node->setData($node->getNext()->getData()); } /** *@author MzXy *@param 遍历 * */ public function get() { $node=$this->header; if($node->getNext()==null){ print("数据集为空!"); return; } while($node->getNext()!=null) { print('['.$node->getNext()->getData().'] -> '); if($node->getNext()->getNext()==null){break;} $node=$node->getNext(); } } /** *@author MzXy *@param $data--要访问的节点的数据 * @param 此方法只是演示不具有实际意义 * */ public function getAt($data) { $node=$this->header->getNext(); if($node->getNext()==null){ print("数据集为空!"); return; } while($node->getData()!=$data) { if($node->getNext()==null){break;} $node=$node->getNext(); } return $node->getData(); } /** *@author MzXy *@param $value--需要更新的节点的原数据 --$initial---更新后的数据 * */ public function update($initial,$value) { $node=$this->header->getNext(); if($node->getNext()==null){ print("数据集为空!"); return; } while($node->getData()!=$data) { if($node->getNext()==null){break;} $node=$node->getNext(); } $node->setData($initial); }}$lists = new LinkList();$lists -> add(1);$lists -> add(2);$lists -> get();echo '<pre>';print_r($lists);echo '</pre>';?>
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