php数组转换成树的几个例子_PHP教程

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Freigeben: 2016-07-13 10:39:29
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   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)     {  
        $maxDepth = count($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






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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