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树状数据展现很常用,今天学习了PHP的递归,也来总结总结! PHP代码:
function _getTreeList_custom1($data,$parent_id,$depth) { $return_array = array(); if(is_array($data) && !empty($data)) { foreach($data as $key => $info) { if($info['parent_id'] == $parent_id) { $info['depth'] = $depth; $temp_info = $info; foreach($data as $s_info) { if($s_info['parent_id'] == $info['id']) { $temp_info['sub'] = _getTreeList_custom1($data, $info['id'], $depth+1); break; } } $return_array[] = $temp_info; } } } return $return_array; } function _getTreeList_custom2($data,$parent_id,$depth) { $return_array = array(); if(is_array($data) && !empty($data)) { foreach($data as $key => $info) { if($info['parent_id'] == $parent_id) { $info['depth'] = $depth; $temp_info = $info; unset($data[$key]); $sub_list = _getTreeList_custom2($data,$info['id'],$depth+1); if(!empty($sub_list)) { $temp_info['sub'] = $sub_list; } $return_array[] = $temp_info; } } } return $return_array; }
前台显示:
function showTreeOnHtml($treeList) { echo '<ul>'; foreach($treeList as $key => $treeInfo) { echo '<li>'; echo $treeInfo['name']; if(!empty($treeInfo['sub'])) { showTreeOnHtml($treeInfo['sub']); } echo '</li>'; } echo '<ul>'; }
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