PHP无限分类-左右值实现

包含（移动多个节点；移动单个节点；删除多个节点；删除单个节点；新增节点），另附数据库表结构~有问题可以留言(www.webyang.net)。

 一、db sql语句//db used for php无限分类create table tree(    id int(10) not null primary key auto_increment,    name varchar(255) not null,    lft int(10) not null default 0,    rgt int(10) not null default 0,    status int(1) not null default 0,    index lft (`lft`),    index rgt (`rgt`),    index status(`status`))charset utf8;insert into tree value (null,'Food',1,18,0);insert into tree value (null,'Fruit',2,11,0);insert into tree value (null,'Red',3,6,0);insert into tree value (null,'Cherry',4,5,0);insert into tree value (null,'Yellow',7,10,0);insert into tree value (null,'Banana',8,9,0);insert into tree value (null,'Meat',12,17,0);insert into tree value (null,'Beef',13,14,0);insert into tree value (null,'Pork',15,16,0);二、php文件<?phperror_reporting(0);/*                         1 Food 18            +------------------------------+        2 Fruit 11                     12 Meat 17    +-------------+                 +------------+3 Red 6      7 Yellow 10       13 Beef 14   15 Pork 164 Cherry 5    8 Banana 9descendants = (right – left - 1) / 2*//** *用于移动一个节点（包括子节点） *@param array $pdata = array('id'=>主键,'root'=>名称) 二选一 父节点(为空时插入最大的父节点) *@param array $ndata = array('id'=>主键,'root'=>名称) 二选一 下一个兄弟节点（没有兄弟的时候就不用） *@param array $cdata = array('id'=>主键,'root'=>名称) 二选一 当前待移动的节点 */function move_tree_all($pdata=array(),$ndata=array(),$cdata=array()) {    $cid   = $cdata['id'] ? intval($cdata['id']) : '';    $croot = $cdata['root'];    if(!$cid && !$croot) return;    //需自加判断    //1、cdata不能为顶级    //2、cdata不能比$pdata等级高    $adata = get_tree_all($cdata); //获取当前移动节点的所有节点    delete_tree_all($cdata,1); //逻辑删除当前移动节点的所有节点    foreach($adata as $k => $val) {        if($k != 0) {            $pdata = array('root'=>$val['parent']);            insert_tree($pdata,'',$val['name'],1);        } else { //first            insert_tree($pdata,$ndata,$val['name'],1);        }    }}/** *用于移动一个节点（不包括子节点） *@param array $pdata = array('id'=>主键,'root'=>名称) 二选一 父节点(为空时插入最大的父节点) *@param array $ndata = array('id'=>主键,'root'=>名称) 二选一 下一个兄弟节点（没有兄弟的时候就不用） *@param array $cdata = array('id'=>主键,'root'=>名称) 二选一 当前待移动的节点 */function move_tree_item($pdata=array(),$ndata=array(),$cdata=array()) {    $cid   = $cdata['id'] ? intval($cdata['id']) : '';    $croot = $cdata['root'];    if(!$cid && !$croot) return;    //需自加判断    //1、cdata不能为顶级    if(!$croot) {        $sql = "SELECT name from tree where id = $cid";        $result = mysql_query($sql);        $row = mysql_fetch_assoc($result);        $croot = $row['name'];        unset($sql);    }    delete_tree_item($cdata,1);    insert_tree($pdata,$ndata,$croot,1);}/** *用于插入一个节点 *@param array $pdata = array('id'=>主键,'root'=>名称) 二选一 父节点(为空时插入最大的父节点) *@param array $ndata = array('id'=>主键,'root'=>名称) 二选一 下一个兄弟节点（没有兄弟的时候就不用） *@param string $name string 新插入的名称 *@param int $update 默认为空，为1时更新插入 */function insert_tree($pdata=array(),$ndata=array(),$name,$update='') {    if(!$name) return;    $pid   = $pdata['id'] ? intval($pdata['id']) : '';    $proot = $pdata['root'];    $nid   = $ndata['id'] ? intval($ndata['id']) : '';    $nroot = $ndata['root'];    //有父无兄（最小的子节点，父节点的最后一个儿子）    if(($pid || $proot) && !($nid || $nroot)) {        $sql    =  $pid ? "SELECT lft, rgt FROM tree WHERE id = '{$pid}';" : "SELECT lft, rgt FROM tree WHERE name = '{$proot}';";        $result = mysql_query($sql);        $row    = mysql_fetch_assoc($result);        unset($sql);        //新节点        $lft  = $row['rgt'];        $rgt  = $lft+1;        if(!$update) {            $sql  = "insert into tree values (null,'{$name}',$lft,$rgt,0);";            $sql1 = "update tree set rgt = rgt+2 where rgt >= {$row['rgt']}";            $sql2 = "update tree set lft = lft+2 where lft >= {$row['rgt']}";        } else {            $sql  =￥本文来%源[email protected]搞@^&代*@码)网5搞gaodaima代码 "update tree set lft=$lft,rgt=$rgt,status=0 where name ='{$name}';";            $sql1 = "update tree set rgt = rgt+2 where status =0 and rgt >= {$row['rgt']}";            $sql2 = "update tree set lft = lft+2 where status =0 and lft >= {$row['rgt']}";        }                mysql_query($sql1);        mysql_query($sql2);        mysql_query($sql); //last add new data    }    //有父有兄    if(($pid || $proot) && ($nid || $nroot)) {        $sql    =  $nid ? "SELECT lft, rgt FROM tree WHERE id = '{$nid}';" : "SELECT lft, rgt FROM tree WHERE name = '{$nroot}';";        $result = mysql_query($sql);        $row    = mysql_fetch_assoc($result);        unset($sql);        //新节点        $lft  = $row['lft'];        $rgt  = $lft+1;        if(!$update) {            $sql  = "insert into tree values (null,'{$name}',$lft,$rgt,0);";            $sql1 = "update tree set rgt = rgt+2 where rgt >= {$row['lft']};";            $sql2 = "update tree set lft = lft+2 where lft >= {$row['lft']};";        } else {            $sql  = "update tree set lft=$lft,rgt=$rgt,status=0 where name ='{$name}';";            $sql1 = "update tree set rgt = rgt+2 where status = 0 and rgt >= {$row['lft']};";            $sql2 = "update tree set lft = lft+2 where status = 0 and lft >= {$row['lft']};";        }        mysql_query($sql1);        mysql_query($sql2);        mysql_query($sql); //last add new data    }    //无父无兄(大佬)    if(!($pid || $proot) && !($nid || $nroot)) {        $sql    =  "SELECT max(`rgt`) as rgt FROM tree;";        $result = mysql_query($sql);        $row    = mysql_fetch_assoc($result);        unset($sql);        //新节点        $lft  = 1;        $rgt  = $row['rgt']+2;        if(!$update) {            $sql  = "insert into tree values (null,'{$name}',$lft,$rgt,0);";            $sql1 = "update tree set rgt = rgt+1";            $sql2 = "update tree set lft = lft+1";        } else {            $sql  = "update tree set lft=$lft,rgt=$rgt,status=0 where name ='{$name}';";            $sql1 = "update tree set rgt = rgt+1 where status = 0";            $sql2 = "update tree set lft = lft+1 where status = 0";        }                mysql_query($sql1);        mysql_query($sql2);        mysql_query($sql); //last add new data    }   }/** *用于删除一个节点(包括子节点) *@param array $data = array('id'=>主键,'root'=>名称) 二选一 *@param int $update 默认为空，为1时逻辑删除 */function delete_tree_all($data,$update='') {    $id   = $data['id'] ? intval($data['id']) : '';    $root = $data['root'];    if(!$id && !$root) return;    $sql    =  $id ? "SELECT lft, rgt FROM tree WHERE id = '{$id}';" : "SELECT lft, rgt FROM tree WHERE name = '{$root}';";    $result = mysql_query($sql);    $row    = mysql_fetch_assoc($result);    unset($sql);    $middle = $row['rgt']-$row['lft']+1;    if(!$update) {        $sql    = "delete from tree where lft BETWEEN '" . $row['lft'] . "' AND '" . $row['rgt'] ."'";        $sql1   = "update tree set rgt = rgt-{$middle} where rgt > {$row['rgt']}";        $sql2   = "update tree set lft = lft-{$middle} where lft > {$row['rgt']}";    } else {        $sql    = "update tree set status = 1 where lft BETWEEN '" . $row['lft'] . "' AND '" . $row['rgt'] ."'";        $sql1   = "update tree set rgt = rgt-{$middle} where status=0 and rgt > {$row['rgt']}";        $sql2   = "update tree set lft = lft-{$middle} where status=0 and lft > {$row['rgt']}";    }        mysql_query($sql);    mysql_query($sql1);    mysql_query($sql2);}/** *用于删除一个节点(不包括子节点) *@param array $data = array('id'=>主键,'root'=>名称) 二选一 *@param int $update 默认为空，为1时逻辑删除 */function delete_tree_item($data,$update='') {    $id   = $data['id'] ? intval($data['id']) : '';    $root = $data['root'];    if(!$id && !$root) return;    $sql    =  $id ? "SELECT id,lft, rgt FROM tree WHERE id = '{$id}';" : "SELECT id,lft, rgt FROM tree WHERE name = '{$root}';";    $result = mysql_query($sql);    $row    = mysql_fetch_assoc($result);    unset($sql);    if(!$update) {        $sql  = "delete from tree where id = {$row['id']};";        $sql1 = "update tree set rgt = rgt-1,lft = lft -1 where lft > {$row['lft']} and rgt  {$row['rgt']}";        $sql3 = "update tree set rgt = rgt-2 where rgt > {$row['rgt']}";    } else {        $sql  = "update tree set status = 1 where id = {$row['id']};";        $sql1 = "update tree set rgt = rgt-1,lft = lft -1 where status = 0 and lft > {$row['lft']} and rgt  {$row['rgt']}";        $sql3 = "update tree set rgt = rgt-2 where status = 0 and rgt > {$row['rgt']}";    }        mysql_query($sql);    mysql_query($sql1);    //can do or not do just right,but not do load empty 2 number in middle    mysql_query($sql2);    mysql_query($sql3);}/** *用于获取所有的节点 *@param array $data = array('id'=>主键,'root'=>名称) 二选一 */function get_tree_all($data) {    $id   = $data['id'] ? intval($data['id']) : '';    $root = $data['root'];    if(!$id && !$root) return;    $sql    =  $id ? "SELECT lft, rgt FROM tree WHERE id = '{$id}';" : "SELECT lft, rgt FROM tree WHERE name = '{$root}';";    $result = mysql_query($sql);    $row    = mysql_fetch_assoc($result);    $adata  = array(); //所有数据    $right  = array(); //计数    $prev   = array();    $result = mysql_query("SELECT id,name, lft, rgt FROM tree WHERE lft BETWEEN '" . $row['lft'] . "' AND '" . $row['rgt'] ."' ORDER BY lft ASC ;");    while ($row = mysql_fetch_assoc($result)) {        if (count($right) > 0) {            while ($right[count($right) - 1] $row['id'],'name'=>$row['name'],'level'=>count($right),'parent'=>$parent);        $right[] = $row['rgt'];        $prev[]  = $row['name'];    }    return $adata;}/** *用于展示分类 *@param array $data = array('id'=>主键,'root'=>名称) 二选一 */function display_tree($data) {    $id   = $data['id'] ? intval($data['id']) : '';    $root = $data['root'];    if(!$id && !$root) return;    $sql    =  $id ? "SELECT lft, rgt FROM tree WHERE id = '{$id}';" : "SELECT lft, rgt FROM tree WHERE name = '{$root}';";    $result = mysql_query($sql);    $row    = mysql_fetch_assoc($result);    $right  = array();    $result = mysql_query("SELECT name, lft, rgt FROM tree WHERE lft BETWEEN '" . $row['lft'] . "' AND '" . $row['rgt'] ."' ORDER BY lft ASC ;");    while ($row = mysql_fetch_assoc($result)) {        if (count($right) > 0) { // 检查我们是否应该将节点移出堆栈            while ($right[count($right) - 1] 'Food'));//display_tree(array('root'=>'bigboss'));//move_tree_all($pdata=array('root'=>'Fruit'),$ndata=array('root'=>'Red'),$cdata=array('root'=>'Meat'));//move_tree_all('','',$cdata=array('root'=>'Meat'));//move_tree_item('','',array('root'=>'Red'));//move_tree_item(array('root'=>'Red'),array('root'=>'Cherry'),array('root'=>'Fruit'));//delete_tree_all(array('root'=>'Yellow'));//delete_tree_all(array('root'=>'Meat'));//delete_tree_item(array('root'=>'Meat'));//insert_tree('','','bigboss');//insert_tree(array('root'=>'Red'),'','dalao');//insert_tree(array('root'=>'Red'),array('root'=>'Cherry'),'baddalao');//insert_tree(array('root'=>'Fruit'),array('root'=>'Red'),'Redbother');display_tree(array('root'=>'Food'));

以上就介绍了PHP无限分类-左右值实现，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。

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