本文实例讲述了PHP实现多级分类生成树的方法。分享给大家供大家参考,具体如下:
条件,数据库里分类是按id,fid(父ID)实现多级分类的!
使用方法:
$sql ="XXXXXXXXXX"; //sql语句 $res = $db->Select($sql); //执行sql $list=array(); treeList(treeGet($res),$list); /生成树 print_r($res); //打印出来看看!
使用结果:
┣推荐新闻啊 ┃┣国际新闻 ┃┣dfffffg ┃┣ttttttt ┃┃┗yyyyy
代码如下:
/** * 选择SQL涵数 * * @access public * @param Array $field 字段信息,支持涵数 * @param Array $table 数据库表 * @param Array $where 条件 * @return SQL SQL语句 */ function treeGet($data) { $tmptree=null; $tree=$data; return treeAddNodeToTree($tmptree,treegetbyuid($tree,0,@$field),$tree); } /** *插入SQL涵数 * * @access public * @param Array $fieldResult 字段信息,支持涵数 * @param Array $table 数据库表 * @return SQL SQL语句 */ function treeAddNodeToTree($Node,$miniTree,&$source) { if(is_array($miniTree)) { foreach($miniTree as $k=>$v) { if(!count($miniTree[$k]['child']=treeAddNodeToTree($miniTree[$k],treegetbyuid($source,@$v['id']),$source))) { unset($miniTree[$k]['child']); $miniTree[$k]['leaf']=true; //设置叶结点 } } return $Node['child']=$miniTree; } } function treegetbyuid(&$stree,$uid) { $dtree=array(); if(is_array($stree)){ foreach($stree as $k=>$v) { if($v['fid']==$uid) { $mytmp=array(); $mytmp=$v; unset($stree[$k]); array_push($dtree,$mytmp); $mytmp=null; } } } return $dtree; } /** *更新SQL涵数 * * @access public * @param Array $fieldResult 字段信息,支持涵数 * @param Array $table 数据库表 * @param Array $where 条件 * @return SQL SQL语句 */ function treeMakeDeep($deep) { $returnValue=""; for (;$deep;$deep--) { $returnValue.="┃"; } return $returnValue."┣"; } function treeList($treeData,&$List) { static $deep=0; if(is_array($treeData)) { foreach($treeData as $k=>$v) { $v['deepValue']=treeMakeDeep($deep); $v['deep']=$deep; $t=$v; unset($t['child']); array_push($List,$t); if($v['child']) { ++$deep; $optionsNode.=treeList($v['child'],$List); $deep--; } } if($lastV=array_pop($List)) { $lastV['deepValue']=str_replace('┣','┗',$lastV['deepValue']); array_push($List,$lastV); } } } function treeSelect($tree,$id,$options="child") { switch(strtolower($options)) { case"child": $tmpTree=array(); $deep=-1; foreach($tree as $k=>$v) { if($id==$v['id']) { array_push($tmpTree,$v); $deep=$v['deep']; } elseif($deep!=-1) { if($v['deep']<=$deep) { break; } else { array_push($tmpTree,$v); } } } break; case "remove": default: $tmpTree=array(); $deep=-1; foreach($tree as $k=>$v) { if($id==$v['id']) { $deep=$v['deep']; continue; } elseif($deep!=-1) { if($v['deep']<=$deep) { array_push($tmpTree,$v); $deep=-1; } continue; } array_push($tmpTree,$v); } } return $tmpTree; }
希望本文所述对大家PHP程序设计有所帮助。