php小代码树形菜单生成

0,'val'=>'*菜单1','parent'=>-1);$mixTree[] = array('id'=>1,'val'=>'*菜单2','parent'=>-1);$mixTree[] = array('id'=>2,'val'=>'*菜单1下的二级菜单1','parent'=>0);$mixTree[] = array('id'=>3,'val'=>'*菜单1下的二级菜单2','parent'=>0);$mixTree[] = array('id'=>4,'val'=>'*菜单2下的二级菜单1','parent'=>1);$mixTree[] = array('id'=>5,'val'=>'*菜单1下的二级菜单2下的三级菜单1','parent'=>3);/* * 通过二维数组把上面的数据挂载成树 */$treeDatas = array();foreach($mixTree as $nodeDatas){    if($nodeDatas['parent']==-1){        $treeDatas[-1][]=$nodeDatas;    }else{        $treeDatas[$nodeDatas['parent']][]=$nodeDatas;    }}/* * 遍历打印其父结点及其子结点 */function traverSesing($nodeDatas,$treeDatas){    echo $nodeDatas['val'];    if(!empty($treeDatas[$nodeDatas['id']])&& is_array($treeDatas[$nodeDatas['id']])){        echo '

'; foreach($treeDatas[$nodeDatas['id']] as $childNodeDatas){ echo '
• '; traverSesing($childNodeDatas, $treeDatas); echo '
'; } echo '

'; } } echo '

';foreach($treeDatas[-1] as $nodeDatas){ echo '
• '; traverSesing($nodeDatas, $treeDatas); echo '
';}echo '

';

执行结果如图：