PHP curl get post

public function httpGet($url=""){			    $curl = curl_init();	    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);	    curl_setopt($curl, CURLOPT_TIMEOUT, 500);	    // 为保证第三方服务器与微信服务器之间数据传输的安全性，所有微信接口采用https方式调用，必须使用下面2行代码打开ssl安全校验。	    // 如果在部署过程中代码在此处验证失败，请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。	    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);	    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);	    curl_setopt($curl, CURLOPT_URL, $url);	    $res = curl_exec($curl);	    curl_close($curl);	    return $res;	}	public function httpPost($url="" ,$requestData=array()){						$curl = curl_init();		curl_setopt($curl, CURLOPT_URL, $url);		curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);		curl_setopt($curl, CURLOPT_POSTFIELDS, $requestData);				$res = curl_exec($curl);		curl_close($curl);				return $res;	}