WeChat cash red envelope is one of the marketing tools provided by the WeChat payment merchant platform. It has been deeply loved by merchants and users since its launch. Merchants can issue cash red envelopes to WeChat Pay users through this platform. After the user receives the red envelope, the funds arrive in the user's WeChat payment change account, which brings enthusiastic response to the merchant's marketing activities in daily operations.
1. You do not need to pay the authorization directory to send red envelopes, but you need to call the IP address of the red envelope API in the merchant's backend, which is the IP of your server that initiates the red envelope request. The operation path is: [Log in to the merchant platform——> Product Center——>Cash Red Envelope——>Product Settings] (Note: The “Product Settings” operation button will only appear after you activate the cash red envelope function).
2. Api certificate is required to send red envelopes.
3. Before issuing cash red envelopes, please make sure you have sufficient funds. The money others pay you through WeChat Pay for buying things on your platform is not the same as the money you need to spend to send red envelopes. The money here needs to be recharged separately. The operation path is: [Log in to the merchant platform——>Account Center——> ;Fund Management——>Recharge].
4. You can borrow rights when sending red envelopes. For example, public account A is a certification service account that has opened WeChat payment. Your event is held in public account B (subscription account or service account is acceptable). Public account B can use A. WeChat Pay sends red envelopes, but sending red envelopes requires knowing the user's openid. When obtaining this openid, you also need to borrow the public account A to obtain it. That is, the openid used to send red envelopes through A must be the openid corresponding to A of the user.

Pre-operation preparation, that is, some configurations of the WeChat payment merchant platform, please refer to the document: https://pay.weixin.qq.com/wiki/doc/api/tools/cash_coupon.php?chapter= 13_3&index=2

In fact, sending red envelopes on WeChat public accounts is similar to corporate payments on WeChat public accounts, so I will sort out corporate payments by the way. Without further ado, I will directly upload the code:

/**
 * 公眾號發(fā)紅包
 * @param string $openid 	用戶openID
 * @param string $money 	金額
 * @param string $trade_no  訂單編號
 * @param string $act_name  活動名稱
 * @return multitype 		支付結(jié)果
 */
public function sendredpack($openid,$money,$trade_no,$act_name){
	$config = $this->config;
	
	$data = array(
		'nonce_str' 		=> self::getNonceStr(),
		'mch_billno'     	=> $trade_no,
		'mch_id' 			=> $config['mch_id'],
		'wxappid' 			=> $config['wxappid'],
		'send_name' 		=> '江南極客',
		're_openid'    		=> $openid,
		'total_amount'    	=> $money * 100, //付款金額單位為分
		'total_num'    		=> 1,
		'wishing'      		=> '祝您天天開心！',
		'client_ip' 		=> self::getip(),
		'act_name' 			=> $act_name,
		'remark' 			=> 'From 江南極客'
	);
	
	$data['sign'] = self::makeSign($data);
	
	//構(gòu)造XML數(shù)據(jù)
	$xmldata = self::array2xml($data);
	
	$url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack';
	//發(fā)送post請求
	$res = self::curl_post_ssl($url, $xmldata);
	
	if(!$res){
		return array('status'=>0, 'msg'=>"Can't connect the server" );
	}
	
	// 這句file_put_contents是用來查看服務器返回的結(jié)果 測試完可以刪除了
	//file_put_contents('./log.txt',$res,FILE_APPEND);
	
	$content = self::xml2array($res);
	if(strval($content['return_code']) == 'FAIL'){
		return array('status'=>0, 'msg'=>strval($content['return_msg']));
	}
	if(strval($content['result_code']) == 'FAIL'){
		return array('status'=>0, 'msg'=>strval($content['err_code']).':'.strval($content['err_code_des']));
	}
	return $content;
}
	
/**
 * 公眾號企業(yè)支付
 * @param string $openid 	用戶openID
 * @param string $money 	金額
 * @param string $trade_no  訂單編號
 * @param string $desc  	付款操作說明信息(比如:提現(xiàn))
 * @return string 	支付結(jié)果
 */
public function mchpay($openid,$money,$trade_no,$desc){
	$config = $this->config;
	$data = array(
		'mch_appid' => $config['wxappid'],
		'mchid'     => $config['mch_id'],
		'nonce_str' => self::getNonceStr(),
		'partner_trade_no' => $trade_no, 
		'openid'    => $openid,
		'check_name'=> 'NO_CHECK', 			//OPTION_CHECK不強制校驗真實姓名, FORCE_CHECK：強制 NO_CHECK：
		'amount'    => $money * 100, 		//付款金額單位為分
		'desc'      => $desc,
		'spbill_create_ip' => self::getip()
	);
	
	//生成簽名
	$data['sign'] = self::makeSign($data);
	
	//return $config;
	
	//構(gòu)造XML數(shù)據(jù)
	$xmldata = self::array2xml($data);
	$url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers';
	//發(fā)送post請求
	$res = self::curl_post_ssl($url, $xmldata);
	if(!$res){
		return array('status'=>0, 'msg'=>"Can't connect the server" );
	}
	// 這句file_put_contents是用來查看服務器返回的結(jié)果 測試完可以刪除了
	//file_put_contents('./log1.txt',$res,FILE_APPEND);
	
	//付款結(jié)果分析
	$content = self::xml2array($res);
	if(strval($content['return_code']) == 'FAIL'){
		return array('status'=>0, 'msg'=>strval($content['return_msg']));
	}
	if(strval($content['result_code']) == 'FAIL'){
		return array('status'=>0, 'msg'=>strval($content['err_code']).':'.strval($content['err_code_des']));
	}
   
	return $content;
}

This is an encapsulated class, and calling the method is super simple:

include 'wxmerpay.class.php';		//引入類文件
$config = array(
	'wxappid'		=> 'wx123456789',
	'mch_id'	 	=> '1123456781',
	'pay_apikey' 	=> '1234567898765432123456789',
	'api_cert'		=> $cert_path . '/apiclient_cert.pem',	
	'api_key'		=> $cert_path . '/apiclient_key.pem',
	'rootca'		=> $cert_path . '/rootca.pem'
);
$redpack = new WxRedpack($config);	//初始化
$redpack->sendredpack($openid,$money,$trade_no,$act_name);  //發(fā)紅包

Is it that simple? right! It’s that simple, but it uses a lot of self-encapsulated functions and methods. Source code download: http://download.csdn.net/download/sinat_35861727/9956485
If you really find it useful, please give it a like and leave a like Good review, thank you! If you have any questions, you can tell me in the comment area!

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