PHP微信退款通知解密最新，支持openssl

<?php //接收通知处理类 class Refund { public function index(){ $xml = file_get_contents("php://input"); if(empty($xml)){ $xml = @$GLOBALS["HTTP_RAW_POST_DATA"]; } $xmlObj=simplexml_load_string($xml,'SimpleXMLElement',LIBXML_NOCDATA); $xmlArr = json_decode(json_encode($xmlObj),true); if ( $xmlArr['return_code'] == 'SUCCESS') { $wx = new WxRefundNotify(); $info = $wx->handle($xmlArr); //得到解密后的信息 if( $info['out_refund_no'] && $info['out_trade_no'] && $info['refund_status'] == 'SUCCESS') { /** 处理自己的业务逻辑，过程在此省略 比如：修改订单为已支付 ........... */ //处理完成之后，告诉微信成功结果 echo '<xml> <return_code><![CDATA[SUCCESS]]></return_code> <return_msg><![CDATA[OK]]></return_msg> </xml>'; exit; } } } } //解密通知类 class WxRefundNotify { const MCH_KEY = '********************'; //改为自己的商户key /** * 方法一 需要openssl扩展 * handle wechat pay refund notify */ public function handle($data){ $encryptData = $data['req_info']; $decryptedData = $this->xml2array($this->decryptData($encryptData, self::MCH_KEY)); return $decryptedData; } /** * 方法二 需要mcrypt扩展 [高版本php已淘汰] * _handle wechat pay refund notify */ public function _handle($data){ $encryptData = base64_decode($data['req_info']); $decryptedData = $this->_decryptAesData($encryptData); return $decryptedData; } private function _decryptAesData( $encryptData){ $md5LowerKey = strtolower(md5(self::MCH_KEY)); $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB), MCRYPT_RAND); $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $md5LowerKey, $encryptData, MCRYPT_MODE_ECB, $iv); return $this->xml2array($decrypted); } private function decryptData( $encryptData){ $md5LowerKey = strtolower(md5(self::MCH_KEY)); $decrypted = openssl_decrypt($encryptData, "AES-256-ECB", $md5LowerKey); return $decrypted; } private function xml2array( $xml){ if (empty($xml)) { throw new \Exception('Error xml data!'); } $p = xml_parser_create(); xml_parse_into_struct($p, $xml, $values, $index); xml_parser_free($p); $result = []; foreach ($values as $val) { $result[strtolower($val['tag'])] = isset($val['value']) ? : ''; } return $result; } }