post xml 操作类

/**
	 * 返回解析后的xml为数组格式
	 * @author caihaibin
	 * @param  $url 提交的url
	 * @param  $data 提交的xml本体
	 * @param  $domtoxml 返回值是否做将xml转换为array
	 * @param  $checkxml 检查提交的xml格式
	 * @param  $replace_empty 将xml转换成单行
	 * @throws Exception
	 * @return mixed
	 */
	function postxml($url,$data,$domtoxml=true,$checkxml=false,$replace_empty=false){
		//过滤换行 必要可以开启调试
		if($replace_empty){
			$data=preg_replace('/(?<=>)([^<]*?)(?=<[/])/sm', '', $data);
			$data=preg_replace('/(?<=>)([s]+?)(?=<[^/])/sm', '', $data);
		}
		//检查dom
		if($checkxml){
			$res = @simplexml_load_string ( $data, NULL, LIBXML_NOCDATA );
			if (! $res) {
				throw new Exception("提交xml异常!");
			}
		}
		$header[] = "Content-type: application/xml";        //定义content-type为xml,注意是数组
		$ch = curl_init ($url);
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
		curl_setopt($ch, CURLOPT_POST, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
		$response = curl_exec($ch);
		if(curl_errno($ch)){
			//print curl_error($ch);
		}
		curl_close($ch);
		if(!$domtoxml)
			return $response;
		$res = @simplexml_load_string ( $response, NULL, LIBXML_NOCDATA );
		if (! $res) {
			throw new Exception("解析xml异常!");
		}
		$res = json_decode ( json_encode ( $res ), true );
		if (! $res) {
			throw new Exception("解析json异常!");
		}
		return $res;
	}

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