PHP Unlimited classification of tree Class code _php tutorial

Copy CodeThe code is as follows:
/**
by Lenush;
*/
Class Tree
{
var $data = array ();
var $child = array ( -1=>array ());
var $layer = array ( -1=>-1);
var $parent = array ();

function Tree ($value)
{
$this->setnode (0,-1, $value);
}//End Func

function Setnode ($id, $parent, $value)
{
$parent = $parent? $parent: 0;

$this->data[$id] = $value;
$this->child[$id] = array ();
$this->child[$parent] [] = $id;
$this->parent[$id] = $parent;

if (!isset ($this->layer[$parent]))
{
$this->layer[$id] = 0;
}
Else
{
$this->layer[$id] = $this->layer[$parent] + 1;
}
}//End Func

Function GetList (& $tree, $root = 0)
{
foreach ($this->child[$root] as $key + = $id)
{
$tree [] = $id;

if ($this->child[$id]) $this->getlist ($tree, $id);
}
}//End Func


function GetValue ($id)
{
return $this->data[$id];
}//End Func


function Getlayer ($id, $space = False)
{
Return $space str_repeat ($space, $this->layer[$id]): $this->layer[$id];
}//End Func

function GetParent ($id)
{
return $this->parent[$id];
}//End Func

function Getparents ($id)
{
while ($this->parent[$id]! =-1)
{
$id = $parent [$this->layer[$id]] = $this->parent[$id];
}

Ksort ($parent);
Reset ($parent);

return $parent;
}//End Func

function Getchild ($id)
{
return $this->child[$id];
}//End Func

function Getchilds ($id = 0)
{
$child = Array ($id);
$this->getlist ($child, $id);

return $child;
}//End Func
}//End Class


New Tree (the name of the root directory);
The ID of the root directory is automatically assigned as 0
$Tree = new Tree (' Directory navigation ');

Setnode (directory ID, ancestor ID, directory name);
$Tree->setnode (1, 0, ' directory 1 ');
$Tree->setnode (2, 1, ' Directory 2 ');
$Tree->setnode (3, 0, ' Directory 3 ');
$Tree->setnode (4, 3, ' directory 3.1 ');
$Tree->setnode (5, 3, ' Directory 3.2 ');
$Tree->setnode (6, 3, ' directory 3.3 ');
$Tree->setnode (7, 2, ' Directory 2.1 ');
$Tree->setnode (8, 2, ' directory 2.2 ');
$Tree->setnode (9, 2, ' directory 2.3 ');
$Tree->setnode (10, 6, ' Directory 3.3.1 ');
$Tree->setnode (11, 6, ' directory 3.3.2 ');
$Tree->setnode (12, 6, ' Directory 3.3.3 ');

Getchilds (specify directory ID);
Gets the specified directory subordinate directory. If no directory is specified, start with the root directory
$category = $Tree->getchilds ();

Traverse output
foreach ($category as $key = $id)
{
echo $Tree->getlayer ($id, ' | '). $Tree->getvalue ($id). "
\ n ";
}
?>

http://www.bkjia.com/PHPjc/320977.html www.bkjia.com true http://www.bkjia.com/PHPjc/320977.html techarticle Copy the code as follows: Php/** by Lenush; */class Tree {var $data = array (), var $child = array ( -1=array ()), var $layer = array ( -1=-1); var $parent = array (); function Tree ...

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