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本文实例讲述了PHP带节点操作的无限分类实现方法。分享给大家供大家参考,具体如下:
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
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 1013 Beef 1415 Pork 164 Cherry 58 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 { //firstinsert_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 {$sql = "update tree set lft=$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"]}";$sql2 = "update tree set lft = lft-2 where lft > {$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 < {$row["rgt"]}";$sql2 = "update tree set lft = lft-2 where status = 0 and lft > {$row["rgt"]}";$sql3 = "update tree set rgt = rgt-2 where status = 0 and rgt > {$row["rgt"]}";}mysql_query($sql);mysql_query($sql1);//can do or not do just right,but not do load empty 2 number in middlemysql_query($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] < $row["rgt"]) { // 检查我们是否应该将节点移出堆栈array_pop($right);array_pop($prev);}}$parent = $prev ? end($prev) : "";$adata[] = array("id"=>$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] < $row["rgt"]) {array_pop($right);}}echo str_repeat(" ",count($right)) . $row["name"] . "
";$right[] = $row["rgt"];}}mysql_connect("localhost","root","") or die("connect error");mysql_select_db("test") or die("database error");mysql_query("set names utf8");display_tree(array("root"=>"Food"));//display_tree(array("root"=>"bigboss"));//move_tree_all($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"));
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