edm/application/lib/common/Transform.class.php

<?php
/* 
 * Desc : Action Transform class
 * 
 * Author: huchunmei
 */

class Transform{
	
	
	public function __construct(){}
	
	/*	
		游戏币转美元，美元转当地金额
		$game_currency,游戏币
		$game_rate,游戏币与美元之间的汇率
		$local_money，当地的货币代码
	*/
	public static function transform($game_currency,$game_rate,$local_money){
		$money = $game_currency*$game_rate;//把游戏币转换成美元
		$rate = Transform::fromUSD('USD',$local_money);//获得该货币对应的美元汇率
		$transform_money = $money*$rate;
		return $transform_money;
		
		
	}
	
	
	
	//实时汇率函数
	public static function fromUSD($from='USD',$to='CHY'){
		if($from&&$to){
				$url="http://download.finance.yahoo.com/d/quotes.html?s=$from$to=X&f=sl1d1t1ba&e=.html";
				$contents=Transform::_link($url);
				$contents=str_replace("\"","",str_replace("/","-",$contents));
				$list=explode(",",$contents);
				return $list[1];//$list[1]就是当前汇率
		}
		exit;
	}
	public static function _link($url){
		$ch = curl_init();
		$timeout = 5;
		curl_setopt ($ch, CURLOPT_URL, "$url");
		curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt ($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
		curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
		$contents = curl_exec($ch);
		curl_close($ch);
		if($contents=="Forbidden" || empty($contents)){
			$contents = @file_get_contents("$url");
		}
		return $contents;
	}



}