php 无限分类
php 无限分类
创建数据库以及表:
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CREATE DATABASE `sortclass`DEFAULT CHARSET utf8; CREATE TABLE IF NOT EXISTS `class` ( `cid` mediumint(8) unsigned NOT NULL auto_increment, `pid` mediumint(8) unsigned NOT NULL, `cname` varchar(50) NOT NULL, PRIMARY KEY (`cid`), KEY `pid` (`pid`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
处理文件示例:
php代码
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<?php header("Content-type: text/html; charset=utf-8"); //连接数据库 $link = mysql_connect('localhost', 'root', 'eric') or die(mysql_error()); mysql_select_db('sortclass', $link); //无限分类类库 class SortClass { var $data = array(); var $child = array(-1 => array() ); var $layer = array(-1 => - 1 ); var $parent = array(); var $link; var $table; function SortClass($link, $table) { $this->setNode(0, -1, '顶极节点'); $this->link = $link; $this->table = $table; $node = array(); $results = mysql_query('select * from ' . $this->table . '', $this->link); while ($node = mysql_fetch_assoc($results)) { $this->setNode($node['cid'], $node['pid'], $node['cname']); } } function setNode($id, $parent, $value) { $parent = $parent ? $parent : 0; $this->data[$id] = $value; $this->child[$id] = array(); $this->child[$parent][] = $id; $this->parent[$id] = $parent; $this->layer[$id] = !isset($this->layer[$parent]) ? 0 : $this->layer[$parent] + 1; } function getList(&$tree, $root = 0) { foreach ($this->child[$root] as $key => $id) { $tree[] = $id; if ($this->child[$id]) $this->getList($tree, $id); } } function getValue($id) { return $this->data[$id]; } function getLayer($id, $space = false) { return $space ? str_repeat($space, $this->layer[$id]) : $this->layer[$id]; } function getParent($id) { return $this->parent[$id]; } function getParents($id) { while ($this->parent[$id] != - 1) { $id = $parent[$this->layer[$id]] = $this->parent[$id]; } ksort($parent); reset($parent); return $parent; } function getChild($id) { return $this->child[$id]; } function getChilds($id = 0) { $child = array( $id ); $this->getList($child, $id); return $child; } function addNode($name, $pid) { mysql_query("insert into $this->table (`pid`,`cname`) values ('$pid','$name')", $this->link); } function modNode($cid, $newName) { mysql_query("update $this->table set `cname`='$newName' where `cid` = $cid", $this->link); } function delNode($cid) { $allChilds = $this->getChilds($cid); $sql = ''; if (empty($allChilds)) { $sql = "delete from $this->table where `cid` = $cid"; } else { $sql = 'delete from ' . $this->table . ' where `cid` in (' . implode(',', $allChilds) . ',' . $cid . ')'; } mysql_query($sql, $this->link); } function moveNode($cid, $topid) { mysql_query("update $this->table set `pid`=$topid where `cid` = $cid", $this->link); } } //函数 function back() { echo '<script language="java script">window.location.href="test.php?"+new Date().getTime();</script>'; exit; } //声成select function makeSelect($array, $formName) { global $tree; $select = '<select name="' . $formName . '">'; foreach ($array as $id) { $select.= '<option value="' . $id . '">' . $tree->getLayer($id, '|-') . $tree->getValue($id) . "</option>"; } return $select . '</select>'; } $tree = new SortClass($link, '`class`'); $op = !empty($_POST['op']) ? $_POST['op'] : $_GET['op']; if (!empty($op)) { if ($op == 'add') { $tree->addNode($_POST['cname'], $_POST['pid']); back(); } if ($op == 'mod') { $tree->modNode($_POST['cid'], $_POST['cname']); back(); } if ($op == 'del') { $tree->delNode($_GET['cid']); back(); } if ($op == 'move') { $tree->moveNode($_POST['who'], $_POST['to']); back(); } } $category = $tree->getChilds(); ?>
css样式
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<style type="text/css"> body{font-size:12px;} ul{list-style:none;} a{cursor:pointer;} </style>
JS代码
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<script language="java script"> function $(e) { return document.getElementById(e); } function mod(cid) { $('cid').value = cid; $('op').value = 'mod'; $('name').style.border = '1px solid red'; } </script>
HTML代码部分
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<form action="test.php" method="post"> 名称:<input type="text" id="name" name="cname" /> 添加到:<?php echo makeSelect($category, 'pid') ?><br /> <input type="hidden" id="op" name="op" value="add" /> <input type="hidden" id="cid" name="cid" /> <input type="submit" value="Submit" /> </form> <h3>移动分类</h3> <form action="test.php" method="post"> <?php echo makeSelect($category, 'who') ?>移动到:<?php echo makeSelect($category, 'to') ?> <input type="hidden" id="op" name="op" value="move" /> <input type="submit" value="Submit" /> </form> <ul> <?php foreach ($category as $id) { echo '<li>' . $tree->getLayer($id, '|- ') . $tree->getValue($id) . ' <a href="test.php?op=del&cid=' . $id . '">Del</a> <a onclick="mod(' . $id . ')">Edit</a> </li>'; } ?> </ul>
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