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public function userjifen_save(){
		$integral = ParamHolder::get('exchange');
		if (trim(SessionHolder::get('SS_LOCALE')) != '') {// 多语言切换用  		
			$curr_locale = trim(SessionHolder::get('_LOCALE'));
		} else {
			$curr_locale = DEFAULT_LOCALE;
		}
		$lang_sw = trim(ParamHolder::get('lang_sw', $curr_locale));
		SessionHolder::set('mod_site/_LOCALE', $lang_sw);
		
		//读取积分总额：
		$curr_user_id = SessionHolder::get('user/id');
        $o_user_ext = new UserExtend();
        $curr_user_ext =& $o_user_ext->find("user_id=?", array($curr_user_id));
        if (!$curr_user_ext) {
            $this->assign('json', Toolkit::jsonERR(__('Invalid ID!')));
            return '_error';
        }
		
		if ($curr_user_ext->total_point < 100 ){
			echo '<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />';
			echo '<script type="text/javascript">
			alert("'.__('Sorry, membership points can be converted more than 100 Member Points').'");
			location.href="'.Html::uriquery('mod_order', 'userjifen').'";</script>';
			exit;
		}
		switch ($integral){
			case 100:
				$cash = 10;
				echo $integral;
			break;
			case 200:
				$cash = 20;
			break;
			case 500:
				$cash = 50;
			break;
			case 1000:
				$cash = 100;
			break;
			default:
				$cash = 0;
			break;
		}
		echo $cash;
		if ($cash==0) {
			 $this->assign('json', Toolkit::jsonERR(__('Please select the options you want to exchange')));
			 echo 'test';
            return '_error';
            echo 'test';
            exit;
		}
		//加入会员的账户余额:
		//读取账户的总额，加上兑换的余额，并更新总额：
		$curr_user_ext -> total_saving = $curr_user_ext -> total_saving + $cash;
		$curr_user_ext -> balance = $curr_user_ext -> balance +$cash;
		$curr_user_ext -> save();
		//生成一个交易记录：
		$o_transaction = new Transaction();
		$o_transaction->action_time = time();
		$o_transaction->user_id = $curr_user_id;
		$o_transaction->type = '1';
		$o_transaction->amount = $cash;
		$o_transaction->memo = __('Redeem account balance');
		$o_transaction->save();
		
		//记录进积分记录表：
		$userPoint = array();
		$userPoint['userid'] = $curr_user_id;
		$userPoint['type'] = 'out';
		$userPoint['point'] = $integral;
		$userPoint['momo'] = __('Redeem account balance');
		$userPoint['create_time'] = time();
		$db =& MySqlConnection::get();
		$sql = "insert into ss_users_points(id,userid,orderid,type,point,momo,create_time) values (null,'{$userPoint['userid']}','0','{$userPoint['type']}','{$userPoint['point']}','{$userPoint['momo']}','{$userPoint['create_time']}')";
		$db->query($sql);
		
		//清零会员的积分
		$curr_user_ext->total_point = $curr_user_ext->total_point-$integral;
		$curr_user_ext -> save();

switch ($integral){
			case 100:
				$cash = 10;
				echo $integral;
			break;
			case 200:
				$cash = 20;
			break;
			case 500:
				$cash = 50;
			break;
			case 1000:
				$cash = 100;
			break;
			default:
				$cash = 0;
			break;
		}

如果比较一个整数和字符串，则字符串会被转换为整数。如果比较两个数字字符串，则作为整数比较。此规则也适用于 switch 语句。
 
<?php
var_dump(0 == "a"); // 0 == 0 -> true
var_dump("1" == "01"); // 1 == 1 -> true
switch ("a") {
case 0:
    echo "0";
    break;
case "a": // never reached because "a" is already matched with 0
    echo "a";
    break;
}
?>
 
字符串转换为数值
当一个字符串被当作数字来求值时，根据以下规则来决定结果的类型和值。
如果包括“.”，“e”或“E”其中任何一个字符的话，字符串被当作 float 来求值。否则就被当作整数。
该值由字符串最前面的部分决定。如果字符串以合法的数字数据开始，就用该数字作为其值，否则其值为 0（零）。合法数字数据由可选的正负号开始，后面跟着一个或多个数字（可选地包括十进制分数），后面跟着可选的指数。指数是一个“e”或者“E”后面跟着一个或多个数字。
 
<?php
$foo = 1 + "10.5";                // $foo is float (11.5)
$foo = 1 + "-1.3e3";              // $foo is float (-1299)
$foo = 1 + "bob-1.3e3";           // $foo is integer (1)
$foo = 1 + "bob3";                // $foo is integer (1)
$foo = 1 + "10 Small Pigs";       // $foo is integer (11)
$foo = 4 + "10.2 Little Piggies"; // $foo is float (14.2)
$foo = "10.0 pigs " + 1;          // $foo is float (11)
$foo = "10.0 pigs " + 1.0;        // $foo is float (11)
?>