php数组转换成树的几个例子
php数组转换成树的几个例子
Php代码代码如下 | |
* $sourceArr 原来的数组 * $key 主键 * $parentKey 与主键关联的父主键 * $childrenKey 生成的孩子的键名 * */ function arrayToTree($sourceArr, $key, $parentKey, $childrenKey) { $tempSrcArr = array(); foreach ($sourceArr as $v) { $tempSrcArr[$v[$key]] = $v; } $i = 0; $count = count($sourceArr); for($i = ($count - 1); $i >=0; $i--) { if (isset($tempSrcArr[$sourceArr[$i][$parentKey]])) { $tArr = array_pop($tempSrcArr); $tempSrcArr[$tArr[$parentKey]][$childrenKey] = (isset($tempSrcArr[$tArr[$parentKey]][$childrenKey]) && is_array($tempSrcArr[$tArr[$parentKey]][$childrenKey])) ? $tempSrcArr[$tArr[$parentKey]][$childrenKey] : array(); array_push ($tempSrcArr[$tArr[$parentKey]][$childrenKey], $tArr); } } return $tempSrcArr; } |
Php代码
* 将数组转换成树
* 例子:将 array(
array('id'=>1,'parentId' => 0,'name'=> 'name1')
,array('id'=>2,'parentId' => 0,'name'=> 'name2')
,array('id'=>4,'parentId' => 1,'name'=> 'name1_4')
,array('id'=>15,'parentId' => 1,'name'=> 'name1_5')
);转换成
* Array(
[1] => Array([id] => 1
[parentId] => 0
[name] => name1
[children] => Array(
[0] => Array([id] => 15,[parentId] => 1,[name] => name1_5)
[1] => Array([id] => 4,[parentId] => 1,[name] => name1_4)
)
)
[2] => Array([id] => 2,[parentId] => 0,[name] => name2)
)
* @param array $sourceArr 要转换的数组
* @param string $key 数组中确认父子的key,例子中为“id”
* @param string $parentKey 数组中父key,例子中为“parentId”
* @param type $childrenKey 要在树节点上索引子节点的key,例子中为“children”
* @return array 返回生成的树
*/
代码如下 | |
function arrayToTree($sourceArr, $key, $parentKey, $childrenKey) { $tempSrcArr = array(); $allRoot = TRUE; foreach ($sourceArr as $v) { $isLeaf = TRUE; foreach ($sourceArr as $cv ) { if (($v[$key]) != $cv[$key]) { if ($v[$key] == $cv[$parentKey]) { $isLeaf = FALSE; } if ($v[$parentKey] == $cv[$key]) { $allRoot = FALSE; } } } if ($isLeaf) { $leafArr[$v[$key]] = $v; } $tempSrcArr[$v[$key]] = $v; } if ($allRoot) { return $tempSrcArr; } else { unset($v, $cv, $sourceArr, $isLeaf); foreach ($leafArr as $v) { if (isset($tempSrcArr[$v[$parentKey]])) { $tempSrcArr[$v[$parentKey]][$childrenKey] = (isset($tempSrcArr[$v[$parentKey]][$childrenKey]) && is_array($tempSrcArr[$v[$parentKey]][$childrenKey])) ? $tempSrcArr[$v[$parentKey]][$childrenKey] : array(); array_push ($tempSrcArr[$v[$parentKey]][$childrenKey], $v); unset($tempSrcArr[$v[$key]]); } } unset($v); return arrayToTree($tempSrcArr, $key, $parentKey, $childrenKey); } } |
Php代码
/**递归方法:**/
$rows = array(
0 => array('id' => 1, 'name' => '菜单1', 'parentId' => 0)
, 1 => array('id' => 2, 'name' => '菜单2', 'parentId' => 0)
, 2 => array('id' => 3, 'name' => '菜单3', 'parentId' => 0)
, 3 => array('id' => 4, 'name' => '菜单1_1', 'parentId' => 1)
, 4 => array('id' => 5, 'name' => '菜单1_2', 'parentId' => 1)
, 5 => array('id' => 6, 'name' => '菜单2_1', 'parentId' => 2)
);
print_r(getTree($rows, 0, 'id', 'parentId'));
代码如下 | |
/** * 数组根据父id生成树 * @staticvar int $depth 递归深度 * @param array $data 数组数据 * @param integer $pid 父id的值 * @param string $key id在$data数组中的键值 * @param string $chrildKey 要生成的子的键值 * @param string $pKey 父id在$data数组中的键值 * @param int $maxDepth 最大递归深度,防止无限递归 * @return array 重组后的数组 */ function getTree($data, $pid = 0, $key = 'id', $pKey = 'parentId', $childKey = 'child', $maxDepth = 0){ static $depth = 0; $depth++; if (intval($maxDepth) <= 0) { $maxDepth = count($data) * count($data); } if ($depth > $maxDepth) { exit("error recursion:max recursion depth {$maxDepth}"); } $tree = array(); foreach ($data as $rk => $rv) { if ($rv[$pKey] == $pid) { $rv[$childKey] = getTree($data, $rv[$key], $key, $pKey, $childKey, $maxDepth); $tree[] = $rv; } } return $tree; } |
一个实例
代码如下 | 复制代码 |
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script> <title>TREE</title> <style type="text/css"> /*树的全局CSS*/ .kyp_tree{ font: 12px/2.5 verdana; float:left;display:inline; } .kyp_tree dd{ margin:0;padding:0; margin-left:20px; } /*链接*/ .kyp_tree dl a{ font-size:12px; color:#333; text-decoration:none; } .kyp_tree dl a:hover, .kyp_tree dd dt.red_sub a{ font-size:12px; color:#AE0002; } /*一级dl*/ .kyp_tree dl{ border-bottom:1px dashed #ccc; margin:0;padding:0; } /*次级dl*/ .kyp_tree dl dl, .kyp_tree dl.last{ border:none; } .kyp_tree dd dt.currentClass{ background:url(tree_top.gif) no-repeat 0 -24px; } /*一级标题*/ .kyp_tree dt{ background:url(tree_top.gif) no-repeat 2px -57px; padding-left:15px; cursor:pointer; font-size:13px; height:30px; line-height :27px; line-height :32px9; } /*子标题*/ .kyp_tree dd dt{ background:url(tree_arrow.gif) no-repeat 2px 10px; font-size:12px; } /*一级张开样式*/ .kyp_tree dt.open{ background:url(tree_top.gif) no-repeat 2px 12px; } /*张开样式*/ .kyp_tree dd dt.open{ background:url(tree_arrow.gif) no-repeat 0 -25px; } /*没有子节点的样式*/ .kyp_tree dt.nosub{ background:none; } </style> <script type="text/javascript"> //<![CDATA[ jQuery.fn.createTree = function (fn, ini){ var $ = jQuery, ini = Object(ini); this.find('dd').hide(); this.children('dl:last').addClass('last'); this.find('dt', this).each(function (){ var nosub = $(this).next('dd').size() == 0; if (nosub) { $(this).addClass('nosub'); } if (ini.id && ini.id == $(this).attr('classify')) { $(this).parents('dd').show().prev('dt').addClass('open'); $(this).addClass('red_sub'); if (nosub) { $(this).addClass('currentClass') }else{ $(this).next('dd').show(); $(this).addClass('open') } } }).click(function (e){ var dd = $(this).next('dd'), isClose = dd.css('display') == 'none'; if (dd.size()) { if (isClose) { dd.show(); $(this).addClass('open') }else{ dd.hide(); $(this).removeClass('open') } } return fn && fn.call(this, e, dd) }); if (ini.mx) { this.find('dt').click(function (e){ var J = $(this); if (J.next('dd').size()) { if (J.hasClass('open')) { J.parent().siblings('dl').children('dd').hide(); J.parent().siblings('dl').children('dt').removeClass('open'); J.next('dd').show(); J.addClass('open') } } }) } }; (function ($){ $(function (){ $('#tree_wrap').createTree(function (e, dd){//回调(事件, 下一个dd) $('#show').html(this.innerHTML+dd.size()) }, {mx: 1, id: 200})// mx是否互斥, id 当前类别 }); })(jQuery) //]]> </script> </head> <body> <?php // 树组的顺序即是分类的顺序,因此前当分类的下级子类一定要紧随其后 $tree= array( 1 => array('id'=>1, 'cname'=>'一级分类', 'pid'=>0), 100 => array('id'=>100, 'cname'=>'特意加进去的二级分类', 'pid'=>1), 101 => array('id'=>101, 'cname'=>'特意加进去的二级分类2222222222', 'pid'=>1), 2 => array('id'=>2, 'cname'=>'二级分类', 'pid'=>1), 3 => array('id'=>3, 'cname'=>'三级分类', 'pid'=>2), 4 => array('id'=>4, 'cname'=>'四级分类', 'pid'=>3), 5 => array('id'=>5, 'cname'=>'四级分类2', 'pid'=>3), 200 => array('id'=>200, 'cname'=>'55555', 'pid'=>5), 6 => array('id'=>6, 'cname'=>'另一级分类', 'pid'=>0), 7 => array('id'=>7, 'cname'=>'First First First', 'pid'=>0), 8 => array('id'=>8, 'cname'=>'First First First', 'pid'=>7), ); // 指定分类ID,返回子类量(不进行深度递归) function getChildTotal($id) { global $tree; $total = 0; foreach($tree as $value) { if ($id == $value['pid']) { $total++; } } return $total; } // 指定分类ID,www.111cn.net并返回数组(不进行深度递归) function getChildArray($id) { global $tree; $array = array(); foreach($tree as $key=>$value) { if ($id == $value['pid']) { $array[$key] = $value; } } return $array; } // 递归查询方式将树数组转换成HTML嵌套树 function getTreeHTML($tree,$level = 0) { if ($tree) { $level += 1; foreach($tree as $id => $node) { $html .= "<dl>"; $html .= '<dt classify="'.$node['id'].'"><a href="http://www.baidu.com/">'.$node['cname']."</a></dt>"; if (getChildTotal($node['id'])) { $tree_last = getChildArray($node['id']); $html .= '<dd>'; $html .= getTreeHTML($tree_last,$level); $html .= '</dd>'; } $html .= '</dl>'; } } return $html; } $html = getTreeHTML( getChildArray(0) ); echo '<div >'; echo $html; echo '</div><div ></div>'; ?> </body> </html> |