Heim > Backend-Entwicklung > PHP-Tutorial > So verwenden Sie die Baumklasse in PHP

So verwenden Sie die Baumklasse in PHP

小云云
Freigeben: 2023-03-21 17:46:02
Original
2244 Leute haben es durchsucht

本文主要和大家分享php中tree类的使用方法,希望能帮助到大家。

<?php
include &#39;tree.class.php&#39;;
//模拟数据库
$data=array(
    array(&#39;id&#39;=>1,&#39;pid&#39;=>0,&#39;name&#39;=>&#39;一级栏目一&#39;),
    array(&#39;id&#39;=>2,&#39;pid&#39;=>0,&#39;name&#39;=>&#39;一级栏目二&#39;),
    array(&#39;id&#39;=>3,&#39;pid&#39;=>1,&#39;name&#39;=>&#39;二级栏目一&#39;),
    array(&#39;id&#39;=>4,&#39;pid&#39;=>3,&#39;name&#39;=>&#39;三级栏目一&#39;),
    array(&#39;id&#39;=>5,&#39;pid&#39;=>4,&#39;name&#39;=>&#39;四级栏目一&#39;),
);
//转换数据
$tree_data=array();
foreach ($data as $key=>$value){
    $tree_data[$value[&#39;id&#39;]]=array(
        &#39;id&#39;=>$value[&#39;id&#39;],
        &#39;parentid&#39;=>$value[&#39;pid&#39;],
        &#39;name&#39;=>$value[&#39;name&#39;]
    );
}
/**
 * 输出树形结构
 */
$str="<tr>
    <td><input type=&#39;checkbox&#39; name=&#39;list[\$id]&#39; value=&#39;\$id&#39;></td>
    <td>\$id</td>
    <td>\$spacer\$name</td>
    <td><a href=&#39;add.php?id=\$id&#39;>添加</a></td>
    <td><a href=&#39;del.php?id=\$id&#39;>删除</a></td>
    <td><a href=&#39;update.php?id=&#39;\$id&#39;>修改</a></td>
    </tr>";
$tree=new Tree();
$tree->init($tree_data);
echo "<table>";
echo $tree->get_tree(0, $str);
echo "</table>";
echo "<br/>";
echo "<br/>";
echo "<br/>";
echo "<br/>";
/**
 * 输出下拉列表
 */
$str="<option value=\$id \$selected>\$spacer\$name</option>";
$tree=new Tree();
$tree->init($tree_data);
echo "<select>";
echo $tree->get_tree(0, $str,2);
echo "</select>";
Nach dem Login kopieren

tree.class.php

<?php
/**
* 通用的树型类,可以生成任何树型结构
*/
class tree {
	/**
	* 生成树型结构所需要的2维数组
	* @var array
	*/
	public $arr = array();

	/**
	* 生成树型结构所需修饰符号,可以换成图片
	* @var array
	*/
	public $icon = array(&#39;│&#39;,&#39;├&#39;,&#39;└&#39;);
	public $nbsp = " ";

	/**
	* @access private
	*/
	public $ret = &#39;&#39;;

	/**
	* 构造函数,初始化类
	* @param array 2维数组,例如:
	* array(
	*      1 => array(&#39;id&#39;=>&#39;1&#39;,&#39;parentid&#39;=>0,&#39;name&#39;=>&#39;一级栏目一&#39;),
	*      2 => array(&#39;id&#39;=>&#39;2&#39;,&#39;parentid&#39;=>0,&#39;name&#39;=>&#39;一级栏目二&#39;),
	*      3 => array(&#39;id&#39;=>&#39;3&#39;,&#39;parentid&#39;=>1,&#39;name&#39;=>&#39;二级栏目一&#39;),
	*      4 => array(&#39;id&#39;=>&#39;4&#39;,&#39;parentid&#39;=>1,&#39;name&#39;=>&#39;二级栏目二&#39;),
	*      5 => array(&#39;id&#39;=>&#39;5&#39;,&#39;parentid&#39;=>2,&#39;name&#39;=>&#39;二级栏目三&#39;),
	*      6 => array(&#39;id&#39;=>&#39;6&#39;,&#39;parentid&#39;=>3,&#39;name&#39;=>&#39;三级栏目一&#39;),
	*      7 => array(&#39;id&#39;=>&#39;7&#39;,&#39;parentid&#39;=>3,&#39;name&#39;=>&#39;三级栏目二&#39;)
	*      )
	*/
	public function init($arr=array()){
       $this->arr = $arr;
	   $this->ret = &#39;&#39;;
	   return is_array($arr);
	}

    /**
	* 得到父级数组
	* @param int
	* @return array
	*/
	public function get_parent($myid){
		$newarr = array();
		if(!isset($this->arr[$myid])) return false;
		$pid = $this->arr[$myid][&#39;parentid&#39;];
		$pid = $this->arr[$pid][&#39;parentid&#39;];
		if(is_array($this->arr)){
			foreach($this->arr as $id => $a){
				if($a[&#39;parentid&#39;] == $pid) $newarr[$id] = $a;
			}
		}
		return $newarr;
	}

    /**
	* 得到子级数组
	* @param int
	* @return array
	*/
	public function get_child($myid){
		$a = $newarr = array();
		if(is_array($this->arr)){
			foreach($this->arr as $id => $a){
				if($a[&#39;parentid&#39;] == $myid) $newarr[$id] = $a;
			}
		}
		return $newarr ? $newarr : false;
	}

    /**
	* 得到当前位置数组
	* @param int
	* @return array
	*/
	public function get_pos($myid,&$newarr){
		$a = array();
		if(!isset($this->arr[$myid])) return false;
        $newarr[] = $this->arr[$myid];
		$pid = $this->arr[$myid][&#39;parentid&#39;];
		if(isset($this->arr[$pid])){
		    $this->get_pos($pid,$newarr);
		}
		if(is_array($newarr)){
			krsort($newarr);
			foreach($newarr as $v){
				$a[$v[&#39;id&#39;]] = $v;
			}
		}
		return $a;
	}

    /**
	* 得到树型结构
	* @param int ID,表示获得这个ID下的所有子级
	* @param string 生成树型结构的基本代码,例如:"<option value=\$id \$selected>\$spacer\$name</option>"
	* @param int 被选中的ID,比如在做树型下拉框的时候需要用到
	* @return string
	*/
	public function get_tree($myid, $str, $sid = 0, $adds = &#39;&#39;, $str_group = &#39;&#39;){
		$number=1;
		$child = $this->get_child($myid);
		if(is_array($child)){
		    $total = count($child);
			foreach($child as $id=>$value){
				$j=$k=&#39;&#39;;
				if($number==$total){
					$j .= $this->icon[2];
				}else{
					$j .= $this->icon[1];
					$k = $adds ? $this->icon[0] : &#39;&#39;;
				}
				$spacer = $adds ? $adds.$j : &#39;&#39;;
				$selected = $id==$sid ? &#39;selected&#39; : &#39;&#39;;
				@extract($value);
				$parentid == 0 && $str_group ? eval("\$nstr = \"$str_group\";") : eval("\$nstr = \"$str\";");
				$this->ret .= $nstr;
				$nbsp = $this->nbsp;
				$this->get_tree($id, $str, $sid, $adds.$k.$nbsp,$str_group);
				$number++;
			}
		}
		return $this->ret;
	}
    /**
	* 同上一方法类似,但允许多选
	*/
	public function get_tree_multi($myid, $str, $sid = 0, $adds = &#39;&#39;){
		$number=1;
		$child = $this->get_child($myid);
		if(is_array($child)){
		    $total = count($child);
			foreach($child as $id=>$a){
				$j=$k=&#39;&#39;;
				if($number==$total){
					$j .= $this->icon[2];
				}else{
					$j .= $this->icon[1];
					$k = $adds ? $this->icon[0] : &#39;&#39;;
				}
				$spacer = $adds ? $adds.$j : &#39;&#39;;
				
				$selected = $this->have($sid,$id) ? &#39;selected&#39; : &#39;&#39;;
				@extract($a);
				eval("\$nstr = \"$str\";");
				$this->ret .= $nstr;
				$this->get_tree_multi($id, $str, $sid, $adds.$k.&#39; &#39;);
				$number++;
			}
		}
		return $this->ret;
	}
	 /**
	* @param integer $myid 要查询的ID
	* @param string $str   第一种HTML代码方式
	* @param string $str2  第二种HTML代码方式
	* @param integer $sid  默认选中
	* @param integer $adds 前缀
	*/
	public function get_tree_category($myid, $str, $str2, $sid = 0, $adds = &#39;&#39;){
		$number=1;
		$child = $this->get_child($myid);
		if(is_array($child)){
		    $total = count($child);
			foreach($child as $id=>$a){
				$j=$k=&#39;&#39;;
				if($number==$total){
					$j .= $this->icon[2];
				}else{
					$j .= $this->icon[1];
					$k = $adds ? $this->icon[0] : &#39;&#39;;
				}
				$spacer = $adds ? $adds.$j : &#39;&#39;;
				
				$selected = $this->have($sid,$id) ? &#39;selected&#39; : &#39;&#39;;
				@extract($a);
				if (empty($html_disabled)) {
					eval("\$nstr = \"$str\";");
				} else {
					eval("\$nstr = \"$str2\";");
				}
				$this->ret .= $nstr;
				$this->get_tree_category($id, $str, $str2, $sid, $adds.$k.&#39; &#39;);
				$number++;
			}
		}
		return $this->ret;
	}
	
	/**
	 * 同上一类方法,jquery treeview 风格,可伸缩样式(需要treeview插件支持)
	 * @param $myid 表示获得这个ID下的所有子级
	 * @param $effected_id 需要生成treeview目录数的id
	 * @param $str 末级样式
	 * @param $str2 目录级别样式
	 * @param $showlevel 直接显示层级数,其余为异步显示,0为全部限制
	 * @param $style 目录样式 默认 filetree 可增加其他样式如&#39;filetree treeview-famfamfam&#39;
	 * @param $currentlevel 计算当前层级,递归使用 适用改函数时不需要用该参数
	 * @param $recursion 递归使用 外部调用时为FALSE
	 */
    function get_treeview($myid,$effected_id=&#39;example&#39;,$str="<span class=&#39;file&#39;>\$name</span>", $str2="<span class=&#39;folder&#39;>\$name</span>" ,$showlevel = 0 ,$style=&#39;filetree &#39; , $currentlevel = 1,$recursion=FALSE) {
        $child = $this->get_child($myid);
        if(!defined(&#39;EFFECTED_INIT&#39;)){
           $effected = &#39; id="&#39;.$effected_id.&#39;"&#39;;
           define(&#39;EFFECTED_INIT&#39;, 1);
        } else {
           $effected = &#39;&#39;;
        }
		$placeholder = 	&#39;<ul><li><span class="placeholder"></span></li></ul>&#39;;
        if(!$recursion) $this->str .=&#39;<ul&#39;.$effected.&#39;  class="&#39;.$style.&#39;">&#39;;
        foreach($child as $id=>$a) {

        	@extract($a);
			if($showlevel > 0 && $showlevel == $currentlevel && $this->get_child($id)) $folder = &#39;hasChildren&#39;; //如设置显示层级模式@2011.07.01
        	$floder_status = isset($folder) ? &#39; class="&#39;.$folder.&#39;"&#39; : &#39;&#39;;		
            $this->str .= $recursion ? &#39;<ul><li&#39;.$floder_status.&#39; id=\&#39;&#39;.$id.&#39;\&#39;>&#39; : &#39;<li&#39;.$floder_status.&#39; id=\&#39;&#39;.$id.&#39;\&#39;>&#39;;
            $recursion = FALSE;
            if($this->get_child($id)){
            	eval("\$nstr = \"$str2\";");
            	$this->str .= $nstr;
                if($showlevel == 0 || ($showlevel > 0 && $showlevel > $currentlevel)) {
					$this->get_treeview($id, $effected_id, $str, $str2, $showlevel, $style, $currentlevel+1, TRUE);
				} elseif($showlevel > 0 && $showlevel == $currentlevel) {
					$this->str .= $placeholder;
				}
            } else {
                eval("\$nstr = \"$str\";");
                $this->str .= $nstr;
            }
            $this->str .=$recursion ? &#39;</li></ul>&#39;: &#39;</li>&#39;;
        }
        if(!$recursion)  $this->str .=&#39;</ul>&#39;;
        return $this->str;
    }
	
	/**
	 * 获取子栏目json
	 * Enter description here ...
	 * @param unknown_type $myid
	 */
	public function creat_sub_json($myid, $str=&#39;&#39;) {
		$sub_cats = $this->get_child($myid);
		$n = 0;
		if(is_array($sub_cats)) foreach($sub_cats as $c) {			
			$data[$n][&#39;id&#39;] = iconv(CHARSET,&#39;utf-8&#39;,$c[&#39;catid&#39;]);
			if($this->get_child($c[&#39;catid&#39;])) {
				$data[$n][&#39;liclass&#39;] = &#39;hasChildren&#39;;
				$data[$n][&#39;children&#39;] = array(array(&#39;text&#39;=>&#39; &#39;,&#39;classes&#39;=>&#39;placeholder&#39;));
				$data[$n][&#39;classes&#39;] = &#39;folder&#39;;
				$data[$n][&#39;text&#39;] = iconv(CHARSET,&#39;utf-8&#39;,$c[&#39;catname&#39;]);
			} else {				
				if($str) {
					@extract(array_iconv($c,CHARSET,&#39;utf-8&#39;));
					eval("\$data[$n][&#39;text&#39;] = \"$str\";");
				} else {
					$data[$n][&#39;text&#39;] = iconv(CHARSET,&#39;utf-8&#39;,$c[&#39;catname&#39;]);
				}
			}
			$n++;
		}
		return json_encode($data);		
	}
	private function have($list,$item){
		return(strpos(&#39;,,&#39;.$list.&#39;,&#39;,&#39;,&#39;.$item.&#39;,&#39;));
	}
}
?>
Nach dem Login kopieren

相关推荐:

php写的无限级selectTree类

Das obige ist der detaillierte Inhalt vonSo verwenden Sie die Baumklasse in PHP. Für weitere Informationen folgen Sie bitte anderen verwandten Artikeln auf der PHP chinesischen Website!

Verwandte Etiketten:
Quelle:php.cn
Erklärung dieser Website
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn
Beliebte Tutorials
Mehr>
Neueste Downloads
Mehr>
Web-Effekte
Quellcode der Website
Website-Materialien
Frontend-Vorlage