微信SDK php接口

<?php /* 微信支付，JSAPI方式 */ class WXPay extends WXBase{ private $mchId; private $mchKey; private $mchCert; private $payUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder"; private $refundUrl = "https://api.mch.weixin.qq.com/secapi/pay/refund"; private $transfersUrl = "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers"; public function __construct($appId, $appSecret, $varPath = '', $mchId = '', $mchKey = '', $mchCert = 'apiclient_cert.pem') { parent::__construct($appId, $appSecret, $varPath); $this -> mchId = $mchId; $this -> mchKey = $mchKey; $this -> mchCert = $mchCert; } /* 创建订单 方式1（通过商户账号和KEY） */ public function Create($openid, $body, $total_fee, $trade_no, $notify_url = 'notify'){ $orderInfo = $this -> CreateOrder($openid, $body, $total_fee, $trade_no, $notify_url); $orderInfo["openid"] = $openid; $orderInfo["trade_type"] = "JSAPI"; $orderInfo["appid"] = $this -> appId; $orderInfo["mch_id"] = $this -> mchId; $orderInfo["nonce_str"] = $this -> createNoncestr(); $orderInfo["sign"] = strtoupper($this -> SignatureArray($orderInfo, "md5", array("key" => $this -> mchKey))); $arr = $this -> ApiCallback($this -> payUrl, $orderInfo); if( is_array($arr) ){ if( isset($arr['prepay_id']) ){ return $this -> JSSDKOrderInfo(array("prepay_id" => $arr['prepay_id'])); }else{ return "可能订单号重复，请刷新页面后重试"; } }else{ return $arr; } } /* 创建订单 方式2(通过 partner) */ public function PartnerCreate($openid, $body, $total_fee, $trade_no, $notify_url = 'notify'){ $packageInfo = $this -> CreateOrder($openid, $body, $total_fee, $trade_no, $notify_url); $packageInfo['partner'] = $this -> mchId; //暂时无法获取：partner $packageInfo["sign"] = strtoupper($this -> SignatureArray($packageInfo, "md5", array("key" => $this -> mchKey))); return $this -> JSSDKOrderInfo($packageInfo); } /* 检查支付结果 */ public function PayResult(){ $res = file_get_contents("php://input"); $arr = $this -> ApiCallback(array("input" => "PayNotify"), $res); if( is_array($arr) ){ return array( "trade_no" => $arr["out_trade_no"], "time" => $arr["time_end"], "total_fee" => $arr["total_fee"], "transaction_id" => $arr["transaction_id"], "openid" => $arr["openid"] ); }else{ return $arr; } } /* 返回支付处理结果 */ public function PayReturn($status, $errInfo){ $arr = array( "return_code" => $status, "return_msg" => $errInfo ); return $this -> ArrayToXML($arr); } /* 给用户退款 */ public function RefundOrder($trade_no, $refund_no, $total_fee, $refund_fee){ $refund = array( "appid" => $this -> appId, "mch_id" => $this -> mchId, "nonce_str" => $this -> createNoncestr(), "out_trade_no" => $trade_no, "out_refund_no" => $refund_no, "total_fee" => $total_fee, "refund_fee" => $refund_fee, "op_user_id" => $this -> mchId ); $refund["sign"] = strtoupper($this -> SignatureArray($refund, "md5", array("key" => $this -> mchKey))); $arr = $this -> ApiCallback($this -> refundUrl, $refund, true); if( is_array($arr) ){ return array( 'refund_fee' => $arr['refund_fee'], 'refund_no' => $arr['out_refund_no'], 'trade_no' => $arr['out_trade_no'] ); }else{ return $arr; } } /* 给用户付款 */ public function TransferAccount($openid, $trans_no, $amount, $body = "提现"){ $trans = array( "mch_appid" => $this -> appId, "mchid" => $this -> mchId, "nonce_str" => $this -> createNoncestr(), "partner_trade_no" => $trans_no, "openid" => $openid, "check_name" => "NO_CHECK", "amount" => $amount, "desc" => $body, "spbill_create_ip" => $_SERVER["SERVER_ADDR"], ); $trans["sign"] = strtoupper($this -> SignatureArray($trans, "md5", array("key" => $this -> mchKey))); $arr = $this -> ApiCallback($this -> transfersUrl, $trans, true, "mchid"); if( is_array($arr) ){ return array( 'payment_time' => $arr['payment_time'], 'partner_trade_no' => $arr['partner_trade_no'], 'payment_no' => $arr['payment_no'] ); }else{ return $arr; } } /* 输出可以供 JSSDK 使用的 数组 */ private function JSSDKOrderInfo($packageInfo){ $jsInfo = array( "appId" => $this -> appId, "timeStamp" => time(), "nonceStr" => $this -> CreateNonceStr(), "package" => $this -> BuilderQuery($packageInfo), "signType" => 'MD5' ); $jsInfo["paySign"] = $this -> SignatureArray($jsInfo, 'md5', array("key" => $this -> mchKey)); $jsInfo["timestamp"] = $jsInfo["timeStamp"]; unset($jsInfo['appId']); return $jsInfo; } /* 返回 证书路径 */ private function GetCertPath($type = "cert", $file = "pem"){ return $this -> varPath . "_" . $type . "_" . $this -> mchCert . "." . $file; } /* 生成订单信息 */ private function CreateOrder($openid, $body, $total_fee, $trade_no, $notify_url){ return array( "body" => $body, "total_fee" => $total_fee * 100, "out_trade_no" => $trade_no, "notify_url" => $this -> GetCallbackUrl($notify_url, "/"), "spbill_create_ip" => $_SERVER['REMOTE_ADDR'] ); } /* 接口返回数据，同意处理 */ private function ApiCallback($url, $param, $cert = false, $mchIdName = 'mch_id'){ $checkSign = false; if( is_array($url) ){ $res = $param; $checkSign = true; }else{ $res = $this -> HttpGet($url, $this -> ArrayToXML($param), $cert ? $this -> GetCertPath("cert") : '', $cert ? $this -> GetCertPath("key") : ''); } if($res == ""){ return "请检查证书是否安装正确"; } $arr = $this -> XMLToArray($res); if( !isset($arr["return_code"]) || !isset($arr["result_code"]) ){ return "系统异常，可能微信支付接口改版"; }elseif ($arr["return_code"] == "FAIL"){ return "系统出错(" . (isset($arr['return_msg'])? $arr['return_msg'] : '系统没有返回出错信息') . ")"; }elseif ($arr["result_code"] == "FAIL"){ return "系统出错(" . (isset($arr['return_msg']) ? $arr['return_msg'] : '系统没有返回出错信息') . (isset($arr['err_code_des'])? '->' . $arr['err_code_des'] : '') . ")"; }elseif( !isset($arr[$mchIdName]) || $arr[$mchIdName] != $this -> mchId ){ return "商户ID不匹配"; }else{ if( $checkSign ){ $arr_sign = isset($arr['sign']) ? $arr['sign'] : ''; unset($arr['sign']); $sign = strtoupper($this -> SignatureArray($arr, 'md5', array("key" => $this -> mchKey))); if( $arr_sign != $sign ){ return "签名信息不匹配"; } } return $arr; } } private function ArrayToXML($arr){ $xml = "<xml>"; foreach ($arr as $key => $val){ $xml .= "<" . $key . ">"; if( is_numeric($val) ){ $xml .= $val; }else{ $xml .= "<![CDATA[" . $val . "]]>"; } $xml .= "</" . $key . ">"; } $xml .= "</xml>"; return $xml; } private function XMLToArray($xml){ return json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true); } } ?>