本文實例講述了PHP帶節點操作的無限分類實現方法。分享給大家供大家參考，具體如下：
包含（移動多個節點；移動單個節點；刪除多個節點；刪除單個節點；新增節點），另附數據庫表結構
一、db sql語句
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//db used for php無限分類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
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<?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*//** *用于移動一個節點（包括子節點） *@param array $pdata = array('id'=>主鍵,'root'=>名稱) 二選一 父節點(為空時插入最大的父節點) *@param array $ndata = array('id'=>主鍵,'root'=>名稱) 二選一 下一個兄弟節點（沒有兄弟的時候就不用） *@param array $cdata = array('id'=>主鍵,'root'=>名稱) 二選一 當前待移動的節點 */function move_tree_all($pdata=array(),$ndata=array(),$cdata=array()) { $cid = $cdata['id'] ? intval($cdata['id']) : ''; $croot = $cdata['root']; if(!$cid && !$croot) return; //需自加判斷 //1、cdata不能為頂級 //2、cdata不能比$pdata等級高 $adata = get_tree_all($cdata); //獲取當前移動節點的所有節點 delete_tree_all($cdata,1); //邏輯刪除當前移動節點的所有節點 foreach($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); } }}/** *用于移動一個節點（不包括子節點） *@param array $pdata = array('id'=>主鍵,'root'=>名稱) 二選一 父節點(為空時插入最大的父節點) *@param array $ndata = array('id'=>主鍵,'root'=>名稱) 二選一 下一個兄弟節點（沒有兄弟的時候就不用） *@param array $cdata = array('id'=>主鍵,'root'=>名稱) 二選一 當前待移動的節點 */function move_tree_item($pdata=array(),$ndata=array(),$cdata=array()) { $cid = $cdata['id'] ? intval($cdata['id']) : ''; $croot = $cdata['root']; if(!$cid && !$croot) return; //需自加判斷 //1、cdata不能為頂級 if(!$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);}/** *用于插入一個節點 *@param array $pdata = array('id'=>主鍵,'root'=>名稱) 二選一 父節點(為空時插入最大的父節點) *@param array $ndata = array('id'=>主鍵,'root'=>名稱) 二選一 下一個兄弟節點（沒有兄弟的時候就不用） *@param string $name string 新插入的名稱 *@param int $update 默認為空，為1時更新插入 */function insert_tree($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 = $ndata['root']; //有父無兄（最小的子節點，父節點的最后一個兒子） if(($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); //新節點 $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); //新節點 $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($sql); //last add new data } //無父無兄(大佬) if(!($pid || $proot) && !($nid || $nroot)) { $sql = "SELECT max(`rgt`) as rgt FROM tree;"; $result = mysql_query($sql); $row = mysql_fetch_assoc($result); unset($sql); //新節點 $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 }}/** *用于刪除一個節點(包括子節點) *@param array $data = array('id'=>主鍵,'root'=>名稱) 二選一 *@param int $update 默認為空，為1時邏輯刪除 */function delete_tree_all($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);}/** *用于刪除一個節點(不包括子節點) *@param array $data = array('id'=>主鍵,'root'=>名稱) 二選一 *@param int $update 默認為空，為1時邏輯刪除 */function delete_tree_item($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 middle mysql_query($sql2); mysql_query($sql3);}/** *用于獲取所有的節點 *@param array $data = array('id'=>主鍵,'root'=>名稱) 二選一 */function get_tree_all($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(); //所有數據 $right = array(); //計數 $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] < $row['rgt']) { // 檢查我們是否應該將節點移出堆棧 array_pop($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;}/** *用于展示分類 *@param array $data = array('id'=>主鍵,'root'=>名稱) 二選一 */function display_tree($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) { // 檢查我們是否應該將節點移出堆棧 while ($right[count($right) - 1] < $row['rgt']) { array_pop($right); } } echo str_repeat(' ',count($right)) . $row['name'] . "\n"; $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')); |
希望本文所述對大家PHP程序設計有所幫助。
