怎么不让php自动把×换成×号

		//参数列表		$signstrarr = array();		$signstrarr['app_key'] = $this->app_key;		$signstrarr['format'] = $this->format;		$signstrarr['method'] = $this->method;		$signstrarr['card_id'] = $card_id;		$signstrarr['password'] = $password;		//$signstrarr['sign_method'] = $this->sign_method;		$signstrarr['timestamp'] = $this->timestamp;		$signstrarr['v'] = $this->v;		$signstrarr['sign_v'] = $this->sign_v;						ksort($signstrarr);//按键名进行升序排列				foreach ($signstrarr as $key=>$value)		{			$signstr .= $key.$value;			$query .= $key.'='.$value.'&';			echo "&".$key."<br />";//这里输出就是&times;tamp了		}

sign_v=1×tamp=20120327105202