Developing app WeChat payment interface based on PHP

This article mainly introduces the development of PHP based on the application payment interface, has a certain reference value, now share to everyone, the need for friends can refer to

Define Merchant payment information.

Define (APPID, $payment [' APPID ']); AppID

Define (Appsecret, $payment [' Appsecret ']); Appsecret

Define (Mchid, $payment [' Partnerid ']);//Merchant number
Define (KEY, $payment [' Partnerkey ']); Pass-Through encryption string

Define (Notify_url, $return _url); Successful callback URL

     The signature required        $signArray = Array (            ' appid ' = = $payment [' AppID '],//appid            ' mch_id ' = ' + $payment [' Partnerid '],            ' nonce_str ' + self::createnoncestr (),            ' out_trade_no ' = $order [' order_sn '],                       ' body ' and ' = ' $order [ ' Body '],            "total_fee" = $order [' Order_amount '],            "Notify_url" and "= $return _url,            " spbill_create_ip "= > $_server["REMOTE_ADDR"],            "Trade_type" and "APP",        );

$sign =self::getsign ($signArray);         Unify the order        $goPay = Array (            ' appid ' = = $payment [' AppID '],//appid            ' mch_id ' + $payment [' Partnerid '],            ' nonce_str ' = $signArray [' nonce_str '],//Generate random string            ' sign ' and $sign,            ' out_trade_no ' and $order [' Order_sn '],                        "total_fee" = = $order [' Order_amount '],             ' body ' and ' = ' $order [' body '],            ' notify_url ' = $ Return_url,             "spbill_create_ip" = $_server["REMOTE_ADDR"],            "Trade_type" and "APP",        );        Convert XML        $goPayXml =self::arraytoxml ($goPay);        $result =self::sendprepaycurl ($goPayXml);        return $result;

Generating random String functions

    Randomly generated string public    function Createnoncestr ($length = +) {        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";        $str = "";        for ($i = 0; $i < $length; $i + +) {            $str. = substr ($chars, Mt_rand (0, strlen ($chars)-1), 1);        }        return $str;    }

Signature functions

/** * Function: Generate signature */Public Function getsign ($OBJ) {foreach ($Obj            as $k = = $v) {//if ($k = = ' code ') continue;            if ($k = = ' from ') continue;        $Parameters [$k] = $v;        }//Signature step one: sorted by dictionary order parameter Ksort ($Parameters);        $String = Self::formatbizqueryparamap ($Parameters, false); Echo ' "string1" '. $String. '        </br> '; Signature Step Two: Add key $String = $String after String. "&key=".               KEY; echo "string2" ". $String."        </br> ";        Signature Step Three: MD5 encryption $String = MD5 ($String); echo "String3" ". $String."        </br> ";        Signature Step four: All characters to uppercase $result _ = Strtoupper ($String); echo "Result". $result _. "        </br> ";    return $result _; }

The parameters required to format the signature public    function Formatbizqueryparamap ($paraMap, $urlencode) {        $buff = "";        Ksort ($PARAMAP);        foreach ($paraMap as $k = + $v) {            if ($urlencode) {                $v = UrlEncode ($v);            }            $buff. = Strtolower ($k). "=" . $v. "&";            $buff. = $k. "=" . $v. "&";        }        $reqPar;        if (strlen ($buff) > 0) {            $reqPar = substr ($buff, 0, strlen ($buff)-1);        }        return $reqPar;    }

Assemble the requested parameter into the XML

/** * Function: Array to XML, assemble request parameters XML */function Arraytoxml ($arr) {$xml = "<xm        L> "; foreach ($arr as $key = + $val) {if (Is_numeric ($val)) {$xml. = "<". $key. " > ". $val." </". $key."          > "; } else $xml. = "<". $key. " ><! [cdata[]. $val. "] ></". $key."          > ";        } $xml. = "</xml>";     return $xml; }

//a function that sends data to an interface via Curl Public function Sendprepaycurl ($xmlData) {$url = "http        S://api.mch.weixin.qq.com/pay/unifiedorder ";        $header [] = "Content-type:text/xml";        $curl = Curl_init ();        curl_setopt ($curl, Curlopt_httpheader, $header);        curl_setopt ($curl, Curlopt_url, $url);        curl_setopt ($curl, Curlopt_returntransfer, true);        curl_setopt ($curl, Curlopt_post, 1);        curl_setopt ($curl, Curlopt_postfields, $xmlData);        $data = curl_exec ($curl);        if (Curl_errno ($curl)) {print curl_error ($curl);        } curl_close ($curl);    Return Self::xmldataparse ($data);        }//xml Format data parsing function public static function Xmldataparse ($data) {$msg = array ();        $msg = (array) simplexml_load_string ($data, ' simplexmlelement ', libxml_nocdata);    return $msg; }