Reason why wechat payment wxpaypubhelper V3 callback XML is empty

Find find , The reason is that the server is upgraded to php7 After version , For example, there is this code in the wechat payment callback , among $xml=$GLOBALS[‘HTTP_RAW_POST_DATA’];// stay PHP7 in . This writing is disabled . It is amended as follows file_get_contents(‘php://input’); that will do

include_once("./log_.php");
	include_once("../WxPayPubHelper/WxPayPubHelper.php");
    // Use the common notification interface 
	$notify = new Notify_pub();
	// Store the callback of wechat 
	$xml = file_get_contents('php://input');	// Change this to normal 
	//$xml =$GLOBALS['HTTP_RAW_POST_DATA'];// stay PHP7  in . This writing is disabled 
	$notify->saveData($xml);
	// Verify the signature , And respond to wechat .
	// When interacting with background notifications , If wechat does not receive the response from the merchant successfully or overtime , Wechat thinks notification failed ,
	// Wechat will adopt certain strategies （ Such as 30 Minutes in total 8 Time ） Periodically re initiate notifications ,
	// Maximize the success rate of notifications , But wechat does not guarantee that the notification will succeed in the end .
	if($notify->checkSign() == FALSE){
    
		$notify->setReturnParameter("return_code","FAIL");// Return status code 
		$notify->setReturnParameter("return_msg"," Signature failed ");// Return information 
	}else{
    
		$notify->setReturnParameter("return_code","SUCCESS");// Set the return code 
		$oid=$notify->data["out_trade_no"];
		// Here is the code to update the order status of the database