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>文章地址:http://www.phprm.com/code/f5a39689a80da0a48a7051af9512d62f.html
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