用于生成一个表格树

生成的例子如下： 

好吧，不知道要怎么上传图片。。。 

<?php
 
/**
 * 树形展示
 * #-------------------------------#
 * #   a   | b | c | d | e | f | g #
 * #-------------------------------#
 * #  a-1  |   |   |   |   |   |   #
 * #-------|   |   |   |   |   |   #
 * #a-2|a-3|   |   |   |   |   |   #
 * #-------------------------------#
 * and open the template in the editor.
 *
 * PHP version 5.3.8
 *
 * @category TreeTable
 * @package  Tree
 * @author   然 <384750321@qq.com>
 *
 */
 
/**
 * 生成表格树
 *
 * PHP version 5.3.8
 *
 * @author 然 <384750321@qq.com>
 */
class TreeTableCross
{
 
    private $_arr, $_rows;
 
    /**
     * 初始化TreeTable数据
     * @param array 2维数组
     * 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($arr)
    {
        if (!is_array($arr)) {
            return false;
        }
        $this->_arr = $arr;
        $this->get_allChilds();
        $this->get_allParent();
        $this->get_depth();
        $this->get_max();
    }
 
    /**
     * 获取最深的树
     *
     */
    public function get_depth()
    {
        $depth = 0;
        foreach ($this->_arr as $k => $v) {
            if ($v[&#39;arrparentids&#39;]) {
                $v[&#39;depth&#39;] = count(explode(&#39;,&#39;, $v[&#39;arrparentids&#39;])) + 1;
                if ($v[&#39;depth&#39;] > $depth) {
                    $depth = $v[&#39;depth&#39;];
                }
            } else {
                $v[&#39;depth&#39;] = 1;
            }
            $this->_arr[$k] = $v;
        }
        $this->_rows = $depth;
    }
 
    /**
     * 获取每个id的最广树
     */
    public function get_max()
    {
        foreach ($this->_arr as $id => $v) {
            $_arr = $this->_arr[$id];
            $depth = array();
            $num = 0;
            // 获取id的最低级的所有节点，根据行数排序
            if ($_arr[&#39;arrchildids&#39;]) {
                $arrchildids = explode(&#39;,&#39;, $_arr[&#39;arrchildids&#39;]);
                foreach ($arrchildids as $v) {
                    if (!$this->_arr[$v][&#39;childids&#39;]) {
                        $depth[$this->_arr[$v][&#39;depth&#39;]][$v] = $v;
                    }
                }
            } else {
                $depth[$_arr[&#39;depth&#39;]][$id] = $id;
            }
            ksort($depth);
            foreach ($depth as $k => $v) {
                $count = count($v);
                $num += $count;
            }
            $this->_arr[$id][&#39;max&#39;] = $num;
        }
    }
 
    /**
     * 根据ID获取所有的父级
     *
     * @param type $id
     * @return type
     */
    public function get_parent($id)
    {
        $arrparents = array();
        $parentid = $this->_arr[$id][&#39;parentid&#39;];
        while ($parentid) {
            $arrparents[$parentid] = $this->_arr[$parentid];
            $parentid = $this->_arr[$parentid][&#39;parentid&#39;];
        }
        return $arrparents;
    }
 
    /**
     * 获取所有的父级
     *
     * @return type
     */
    public function get_allParent()
    {
        $arrparents = array();
        foreach ($this->_arr as $k => $v) {
            $parentid = $v[&#39;parentid&#39;];
            // 循环出所有的父级
            if ($parentid) {
                while ($parentid) {
                    $arrparents[$k][$parentid] = $v;
                    $parentid = $this->_arr[$parentid][&#39;parentid&#39;];
                }
            }
        }
        foreach ($arrparents as $k => $v) {
            ksort($v);
            $this->_arr[$k][&#39;arrparentids&#39;] = implode(&#39;,&#39;, array_keys($v));
        }
    }
 
    /**
     * 根据ID获取二级子级
     *
     * @param type $id
     * @return type
     */
    public function get_childs($id)
    {
        $childs = array();
        if (is_array($this->_arr)) {
            foreach ($this->_arr as $k => $v) {
                if ($v[&#39;parentid&#39;] == $id) {
                    $childs[$k] = $v;
                }
            }
        }
        return $childs;
    }
 
    /**
     * 获取所有的子集
     *
     * @return type
     */
    public function get_allChilds()
    {
        $childs = array();
        foreach ($this->_arr as $k => $v) {
            if ($v[&#39;parentid&#39;] === 0) {
                $childs[$k][$k] = $v;
            } else {
                // 循环判断父级所存在的数组，并把id加入到父级存在的数组中
                if ($childs) {
                    foreach ($childs as $ck => $cv) {
                        if (array_key_exists($v[&#39;parentid&#39;], $cv)) {
                            $childs[$ck][$k] = $v;
                        }
                    }
                }
                $childs[$v[&#39;parentid&#39;]][$k] = $v;
            }
        }
        foreach ($childs as $k => $v) {
            ksort($v);
            // 取出本身id
            unset($v[$k]);
            if ($v) {
                $this->_arr[$k][&#39;arrchildids&#39;] = implode(&#39;,&#39;, array_keys($v));
            }
        }
        // 获取二级id
        foreach ($this->_arr as $k => $v) {
            if ($childids = array_keys($this->get_childs($k))) {
                $this->_arr[$k][&#39;childids&#39;] = implode(&#39;,&#39;, $childids);
            }
        }
    }
 
    public function get_tableTree()
    {
        $_arr = array();
        $str = &#39;&#39;;
        $_save_childs = array();
        // 整理出对应的行数
        foreach ($this->_arr as $k => $v) {
            $_arr[$v[&#39;depth&#39;]][$k] = $v;
        }
        ksort($_arr);
        // 循环行数
        for ($i = 1; $i <= $this->_rows; $i++) {
            $str .= &#39;<tr>&#39;;
            // 对于第二行数据的排序显示，避免数据错乱
            if ($_save_childs) {
                $_save_childs_back = $_save_childs;
                $_save_childs = array();
                // 对于上次循环数据的对应
                foreach ($_save_childs_back as $sk => $sv) {
                    $sv = array_intersect_key($_arr[$i], array_flip($sv));
                    if ($sv) {
                        foreach ($sv as $k => $v) {
                            $value = $v;
                            $_save_childs[$k] = explode(&#39;,&#39;, $value[&#39;arrchildids&#39;]);
                            $str .= "<td width=&#39;100px&#39; colspan=&#39;{$value[&#39;max&#39;]}&#39;>{$value[&#39;name&#39;]}</td>";
                        }
                    } else {
                        // 计算需要合并的行数
                        $rows = $this->_rows - $i + 1;
                        $str .= "<td width=&#39;100px&#39; rowspan=&#39;{$rows}&#39;></td>";
                    }
                }
            } else {
                foreach ($_arr[$i] as $k => $v) {
                    if ($v[&#39;arrchildids&#39;]) {
                        $_save_childs[$k] = explode(&#39;,&#39;, $v[&#39;arrchildids&#39;]);
                    } else {
                        // 计算需要合并的行数
                        $rows = $this->_rows - $i + 1;
                    }
                    $str .= "<td width=&#39;100px&#39; colspan=&#39;{$v[&#39;max&#39;]}&#39; rowspan=&#39;{$rows}&#39;;>{$v[&#39;name&#39;]}</td>";
                }
            }
            $str .= &#39;</tr>&#39;;
        }
        return $str;
    }
 
}
 
$treearr = array(
    1 => array(&#39;id&#39; => &#39;1&#39;, &#39;parentid&#39; => 0, &#39;name&#39; => &#39;1&#39;),
    2 => array(&#39;id&#39; => &#39;2&#39;, &#39;parentid&#39; => 0, &#39;name&#39; => &#39;2&#39;),
    3 => array(&#39;id&#39; => &#39;3&#39;, &#39;parentid&#39; => 1, &#39;name&#39; => &#39;3&#39;),
    4 => array(&#39;id&#39; => &#39;4&#39;, &#39;parentid&#39; => 1, &#39;name&#39; => &#39;4&#39;),
    5 => array(&#39;id&#39; => &#39;5&#39;, &#39;parentid&#39; => 1, &#39;name&#39; => &#39;5&#39;),
    6 => array(&#39;id&#39; => &#39;6&#39;, &#39;parentid&#39; => 0, &#39;name&#39; => &#39;6&#39;),
);
$treeTable = new TreeTableCross();
$treeTable->init($treearr);
echo $treeTable->get_tableTree();
?>

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