PHP生成树的方法

2024-05-04 22:35:39

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本文实例讲述了PHP生成树的方法。分享给大家供大家参考。具体如下：

这个类不是我写的只添加了getAll()函数
php生成一个树，可以用于产品分类
不知道遍历写的是否优化，如果你有请分享一下吧 -.-！

运行效果如下图所示：

实现代码如下：

<?phpclass Tree{ public $data=array(); public $cateArray=array(); public $res=array(); function Tree() { } function setNode ($id, $parent, $value) {  $parent = $parent?$parent:0;  $this->data[$id] = $value;  //print_r($this->data);  //echo "/r/n";  $this->cateArray[$id] = $parent; //节点数组  //print_r($this->cateArray); } function getChildsTree($id=0) {  $childs=array();  foreach ($this->cateArray as $child=>$parent)  {   if ($parent==$id)   {    $childs[$child]=$this->getChildsTree($child);   }  }  print_r($childs)."/r/n";  return $childs; } function getParentsTree($id=0) {  $parents=array();  foreach ($this->cateArray as $child=>$parent)  {   if ($child ==$id)   {    $parents[$parent]=$this->getParentsTree($parent);   }  }  print_r($parents)."/r/n";  return $parents; } function getChilds($id=0) {  $childArray=array();  $childs=$this->getChild($id);  foreach ($childs as $child)  {   $childArray[]=$child;   $childArray=array_merge($childArray,$this->getChilds($child));  }  return $childArray; } function getChild($id) {  $childs=array();  foreach ($this->cateArray as $child=>$parent)  {  if ($parent==$id)  {   $childs[$child]=$child;  }  }  return $childs; } function getParents($id) {  $parentArray=array();  $parents=$this->getParent($id);  foreach ($parents as $parent)  {   $parentArray[]=$parent;   $parentArray=array_merge($parentArray,$this->getParents($parent));  }  return $parentArray; } function getParent($id) {  $parents=array();  foreach ($this->cateArray as $child=>$parent)  {   if ($child==$id)   {   $parents[$parent]=$parent;   }  }  return $parents; } //单线获取父节点 function getNodeLever($id) {  $parents=array();  if (key_exists($this->cateArray[$id],$this->cateArray))  {   $parents[]=$this->cateArray[$id];   $parents=array_merge($parents,$this->getNodeLever($this->cateArray[$id]));  }  return $parents; } function getLayer($id,$preStr='|-') {  return str_repeat($preStr,count($this->getNodeLever($id))); } function getValue ($id) {  return $this->data[$id]; } // end func //获取所有节点数据生成树 function getAll($id=0,$str="|-"){  if($id!=0){   $str=$str."|-";  }  //遍历所有数组检查parent是否有id  foreach($this->cateArray as $child=>$parent){   //检查是否有相等的ID   if($parent==$id){    $this->res[$child]=$str.$this->getValue($child);    $this->getAll($child,$str);   }   //$this->res[$child]=$child.$str.$this->getValue($child);  } }}//构造树//setNode ($id, $parent, $value)$tree = new Tree();$tree->setNode("1","","电器");$tree->setNode("2","","服装");$tree->setNode("3","1","电脑");$tree->setNode("4","1","家电");$tree->setNode("5","2","男装");$tree->setNode("6","2","女装");$tree->setNode("7","3","笔记本");$tree->setNode("8","3","台式机");$tree->setNode("9","7","惠普");$tree->setNode("10","7","戴尔");$tree->setNode("11","8","火星人");$tree->setNode("12","5","西装");$tree->setNode("13","6","上衣");$tree->setNode("14","9","惠普-N90");$tree->setNode("15","9","惠普-N91");$tree->setNode("16","10","戴尔A11");$tree->setNode("17","10","戴尔A12");$tree->setNode("18","10","戴尔A13");$tree->setNode("19","6","裤子 ");$tree->setNode("20","13","长袖");$tree->setNode("21","13","短袖");$tree->setNode("22","20","NIKE长袖");$tree->setNode("23","20","361长袖");$tree->setNode("24","22","NIKE长袖-均码");$tree->setNode("25","22","NIKE长袖-短码");$tree->setNode("26","14","惠普-N90-14寸");$tree->setNode("27","14","惠普-N90-15寸");$tree->setNode("28","14","惠普-N90-17寸");$tree->setNode("29","28","惠普-N90-17寸-高性能企业版");$tree->setNode("30","28","惠普-N90-17寸-普通家用版");//获取一个节点的所有父节点//print_r ($tree->getNodeLever(12));//print_r ($tree->getParentsTree(12));//$childs = $tree->getChildsTree(1);//print_r($childs);//echo "/r/n/r/n/r/n/r/n";/*foreach($childs as $key=>$value){ echo $key."<br>"; //echo $tree->getLayer($key).$tree->getValue($key)."<br>";}*/$tree->getAll();foreach($tree->res as $val){ echo $val."<br>";}?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>生成Tree</title></head><body><h5>生成标签测试</5><select><?php foreach($tree->res as $key=>$val){  echo "<option value='{$key}'>{$val}</option>"; }?></select></body></html>

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