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php数组转换成树的几个例子_PHP教程

时间:2021-07-01 10:21:17 帮助过:4人阅读

  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






TREE



// 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 .= "

";
$html .= '
'.$node['cname']."
";
if (getChildTotal($node['id']))
{
$tree_last = getChildArray($node['id']);

$html .= '

';
$html .= getTreeHTML($tree_last,$level);
$html .= '
';

}
$html .= '

';
}
}
return $html;
}

$html = getTreeHTML( getChildArray(0) );
echo '';
echo $html;
echo '';

?>

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/730238.htmlTechArticlePhp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 * $childrenKey 生成的孩子的键名 * */ function arrayToTree($source...

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