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[数据库]数组树函数


function getTree($data, $pid = 0, $key = 'id', $pKey = 'pid', $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;}