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php数组转换成树的几个例子

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Release: 2016-06-08 17:22:45
Original
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下面我整理了一些常用的数组转换成树的实例与大家一起学习,我想大家都会很喜欢这篇文章的哦。

<script>ec(2);</script>

Php代码 

 代码如下 复制代码
 
* $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 复制代码
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 复制代码
 
/**
 * 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 '
';

?>

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