php获取小程序码的实现代码(B类接口)

效果图

生成小程序码的php代码

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public function qrcode(){      $member_id = session( 'id' );      if ( empty ( $member_id )) $this ->error( '请先登录' );        //推广二维码      $member = model( 'member' )->where( 'id' , $member_id )->find();      if ( $member [ 'is_share' ] && $member [ 'share_qrcode' ]){        $litpic  = $member [ 'share_qrcode' ];      } else {        header( 'content-type:image/jpg' ); //加载速度快        // 生成小程序码        $wechatobj =  new \wechat(); //这是个类 这里有小程序appid和密码        $url = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=" . $wechatobj ->getaccesstoken();          $page = 'pages/index/index' ;        $scene = 'share_id=' . $member_id ;        $path = './upload/qrcode/' . $member_id . '.jpg' ;              $postdata = array ();      $postdata [ 'page' ] = $page ;        $postdata [ 'scene' ] = $scene ;        $data = json_encode( $postdata );                $result = $this ->api_notice_increment( $url , $data );        $image = 'data:image/jpg;base64,' . base64_encode ( $result );                $other_result = $result ;                $file = fopen ( $path , "w" ); //打开文件准备写入      fwrite( $file , $other_result ); //写入      fclose( $file ); //关闭                //return $result;        $litpic  = $path ;        $litpic = ltrim( $litpic , '.' );        //写入数据库        $member ->save([ 'share_qrcode' => $litpic , 'is_share' =>1]);      }        //推广人数      $path_member = model( 'member' )->where( 'path' , $member_id )->field( 'id,name,litpic,add_time' )->select();      $path  = [];      foreach ( $path_member as $v ){        $v [ 'add_time' ] = date ( 'y-m-d h:i:s' , $v [ 'add_time' ]);        $path []   = $v ;      }      $data  = [        'litpic'  => $litpic ,        'path'   => $path ,      ];      return json( $data );        }            public function api_notice_increment( $url , $data ){      //return $data;      $curl = curl_init(); // 启动一个curl会话      //$header = "accept-charset: utf-8";      curl_setopt( $curl , curlopt_url, $url ); // 要访问的地址      curl_setopt( $curl , curlopt_ssl_verifypeer, false); // 对认证证书来源的检测      curl_setopt( $curl , curlopt_ssl_verifyhost, false); // 从证书中检查ssl加密算法是否存在      curl_setopt( $curl , curlopt_httpheader, array ( 'expect:' )); //解决数据包大不能提交      curl_setopt( $curl , curlopt_followlocation, 1); // 使用自动跳转      curl_setopt( $curl , curlopt_autoreferer, 1); // 自动设置referer      curl_setopt( $curl , curlopt_post, 1); // 发送一个常规的post请求      curl_setopt( $curl , curlopt_postfields, $data ); // post提交的数据包      curl_setopt( $curl , curlopt_timeout, 30); // 设置超时限制防止死循      curl_setopt( $curl , curlopt_header, 0); // 显示返回的header区域内容      curl_setopt( $curl , curlopt_returntransfer, 1); // 获取的信息以文件流的形式返回        $tmpinfo = curl_exec( $curl ); // 执行操作      if (curl_errno( $curl )) {        echo 'errno' .curl_error( $curl );      }      curl_close( $curl ); // 关键curl会话      return $tmpinfo ; // 返回数据           }       function api_notice_increment( $url , $data ) {    $curl = curl_init();    $a = strlen ( $data );    $header = array ( "content-type: application/json; charset=utf-8" , "content-length: $a" );    curl_setopt( $curl , curlopt_url, $url );    curl_setopt( $curl , curlopt_ssl_verifypeer, false);    curl_setopt( $curl , curlopt_ssl_verifyhost, false);    curl_setopt( $curl ,curlopt_post,1);    curl_setopt( $curl ,curlopt_postfields, $data );    curl_setopt( $curl , curlopt_header, 0);    curl_setopt( $curl , curlopt_returntransfer, 1);    $res = curl_exec( $curl );    curl_close( $curl );    return $res ;   }

小程序端获取二维码中带的参数

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/**     * 生命周期函数--监听页面加载     */    onload: function (option) {      console.log(option)      if (option.id){       this.setdata({ id: option.id });       this.data.business_id = option.id;       this.loaddata(option.id);      }        //接受二维码扫码并获取二维码中的参数      if (option.scene){       const ids = decodeuricomponent(option.scene).split( '=' )[1];       console.log( "ids" , ids);       this.setdata({ id: ids });       this.data.business_id = ids;       this.loaddata(ids);      }               },

补充上wechat类

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<?php   class wechat {    // +----------------------------------------------------------------------    // |    参数    // +----------------------------------------------------------------------    public $table ;    public $where_web ;    public $wechatid ;    public $wechattoken ;    public $wechatappid ;    public $wechatappsecret ;    public $wechatmchid ;    public $wechatprivatekey ;    public $wechataccesstoken ;    public $wechataccesstokentime ;    public $wechatjsapiticket ;    public $wechatjsapitickettime ;       // +---------------------------------------------------------------------- // |  自动加载 // +----------------------------------------------------------------------    public function __construct() {            //测试      /*$this->wechatid            = 1;      $this->wechatappid          = 'wx1161dbcdd18c52c2';      $this->wechatappsecret        = 'f373410716a198feb462182c69facb8a';      $this->wechatmchid          = 1493574822;      $this->wechatprivatekey        = md5(123);      */      //客户appid      $this ->wechatid            = 1;      $this ->wechatappid          = 'your appid' ;      $this ->wechatappsecret        = 'your appsecret' ;      $this ->wechatmchid          = 商户号;      $this ->wechatprivatekey        = '私钥' ;                  /*        $this->wechattoken          = $wechatinfo['wechat_token'];        $this->wechataccesstoken       = $wechatinfo['wechat_access_token'];        $this->wechataccesstokentime     = $wechatinfo['wechat_access_token_time'];        $this->wechatjsapiticket       = $wechatinfo['wechat_jsapi_ticket'];        $this->wechatjsapitickettime     = $wechatinfo['wechat_jsapi_ticket_time'];      */    }     // +---------------------------------------------------------------------- // |    获取access_token // +----------------------------------------------------------------------    public function getaccesstoken(){        $url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=' . $this ->wechatappid. '&secret=' . $this ->wechatappsecret;      $data = $this -> curlget( $url );      $access_token = $data [ 'access_token' ];      $expires_in  = $data [ 'expires_in' ];      $save [ 'wechat_access_token' ]    = $access_token ;      $save [ 'wechat_access_token_time' ]  = ( $expires_in +time())-360;      $this  ->  wechataccesstoken    = $save [ 'wechat_access_token' ];      $this  ->  wechataccesstokentime  = $save [ 'wechat_access_token_time' ];      return $access_token ;      }    // +----------------------------------------------------------------------    // |    获取access_token    // +----------------------------------------------------------------------    public function getjsapiticket(){        $url = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=' . $this -> getaccesstoken(). '&type=jsapi' ;      $data = $this -> curlget( $url );        $jsapi_ticket = $data [ 'ticket' ];      $expires_in  = $data [ 'expires_in' ];        $save [ 'wechat_jsapi_ticket' ]    = $jsapi_ticket ;      $save [ 'wechat_jsapi_ticket_time' ]  = ( $expires_in +time())-360;        $this ->wechatjsapiticket    = $save [ 'wechat_jsapi_ticket' ];      $this ->wechatjsapitickettime  = $save [ 'wechat_jsapi_ticket_time' ];        return $jsapi_ticket ;      }    // +----------------------------------------------------------------------    // |    获取signature    // +----------------------------------------------------------------------    public function getsignature( $appid , $timestamp , $noncestr , $url )    {        $jsapi_ticket = $this -> getjsapiticket();      $string1 = "jsapi_ticket={$jsapi_ticket}&noncestr={$noncestr}&timestamp={$timestamp}&url={$url}" ;      $signature = sha1( $string1 );      return $signature ;    }    // +----------------------------------------------------------------------    // |    获取createnoncestr    // +----------------------------------------------------------------------    public function getcreatenoncestr( $length = 16) {      $chars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789" ;      $str = "" ;      for ( $i = 0; $i < $length ; $i ++) {       $str .= substr ( $chars , mt_rand(0, strlen ( $chars ) - 1), 1);      }      return $str ;    }    // +----------------------------------------------------------------------    // |    下载本地    // +----------------------------------------------------------------------    public function curldownload( $url , $name )    {      $ch = curl_init ();      curl_setopt ( $ch , curlopt_customrequest, 'get' );      curl_setopt ( $ch , curlopt_ssl_verifypeer, false );      curl_setopt ( $ch , curlopt_url, $url );      ob_start ();      curl_exec ( $ch );      $return_content = ob_get_contents ();      ob_end_clean ();      $return_code = curl_getinfo ( $ch , curlinfo_http_code );        $filename = "uploads/card/{$name}" ;      $fp = @ fopen ( $filename , "a" );      fwrite( $fp , $return_content );      // 关闭url请求      curl_close( $ch );        $url = "/uploads/card/{$name}" ;        return "{$url}" ;    }    // +----------------------------------------------------------------------    // |    get请求    // +----------------------------------------------------------------------    public function curlget( $url )    {        $ch = curl_init();        curl_setopt( $ch , curlopt_url, $url );        curl_setopt( $ch , curlopt_ssl_verifypeer, false);        curl_setopt( $ch , curlopt_ssl_verifyhost, false);        curl_setopt( $ch , curlopt_returntransfer, 1);        $output = curl_exec( $ch );        curl_close( $ch );        $jsoninfo = json_decode( $output , true);        return $jsoninfo ;    }    // +----------------------------------------------------------------------    // |    post ssl请求    // +----------------------------------------------------------------------    public function curlpostssl( $url , $vars , $second =30, $aheader = array ()){      $ch = curl_init();      //超时时间      curl_setopt( $ch ,curlopt_timeout, $second );      curl_setopt( $ch ,curlopt_returntransfer, 1);      //这里设置代理，如果有的话      curl_setopt( $ch ,curlopt_url, $url );      curl_setopt( $ch ,curlopt_ssl_verifypeer,false);      curl_setopt( $ch ,curlopt_ssl_verifyhost,false);      //curl_setopt($ch,curlopt_sslcerttype,'pem');      curl_setopt( $ch ,curlopt_sslcert, getcwd (). '/cert/apiclient_cert.pem' );      //curl_setopt($ch,curlopt_sslkeytype,'pem');      curl_setopt( $ch ,curlopt_sslkey, getcwd (). '/cert/apiclient_key.pem' );        if ( count ( $aheader ) >= 1 ){        curl_setopt( $ch , curlopt_httpheader, $aheader );      }        curl_setopt( $ch ,curlopt_post, 1);      curl_setopt( $ch ,curlopt_postfields, $vars );      $data = curl_exec( $ch );      if ( $data ){        curl_close( $ch );        return $data ;      } else {        $error = curl_errno( $ch );        echo "call faild, errorcode:$error\n" ;        curl_close( $ch );        return false;      }    }      // +----------------------------------------------------------------------    // | 发送退款    //  退款单号 out_trade_no    //  交易金额 total_fee    //  退款金额 refund_fee    // +----------------------------------------------------------------------    public function refund( $out_trade_no , $total_fee , $refund_fee ){        $arr [ 'appid' ]      =  $this ->wechatappid;      $arr [ 'mch_id' ]     =  $this ->wechatmchid;      $arr [ 'nonce_str' ]    =  $this ->getnoncestr();      $arr [ 'out_trade_no' ]  =  $out_trade_no ;      $arr [ 'out_refund_no' ]  =  $this ->getnoncestr();      $arr [ 'total_fee' ]    =  $total_fee ;      $arr [ 'refund_fee' ]   =  $refund_fee ;      $arr [ 'sign' ]      =  $this ->makesign( $arr );        //将统一下单数组 转换xml      $xml            =  $this ->toxml( $arr );          //post xml 到微信退款接口      $url  =  "https://api.mch.weixin.qq.com/secapi/pay/refund" ;;//微信退款地址，post请求      $ch =curl_init();      //需要获取的url地址，也可以在 curl_init() 函数中设置。      curl_setopt( $ch ,curlopt_url, $url );      //启用时会将头文件的信息作为数据流输出。      //curl_setopt($ch,curlopt_header,1);      //将 curl_exec() 获取的信息以文件流的形式返回，而不是直接输出。      curl_setopt( $ch ,curlopt_returntransfer,1);      //证书检查      curl_setopt( $ch ,curlopt_ssl_verifypeer,false);      //证书的类型。支持的格式有"pem" (默认值), "der"和"eng"。      curl_setopt( $ch ,curlopt_sslcerttype, 'pem' );      //一个包含pem格式证书的文件名。      curl_setopt( $ch ,curlopt_sslcert,gen. '/cert/apiclient_cert.pem' );      curl_setopt( $ch ,curlopt_sslcerttype, 'pem' );      curl_setopt( $ch ,curlopt_timeout,30);      //包含ssl私钥的文件名。      curl_setopt( $ch ,curlopt_sslkey,gen. '/cert/apiclient_key.pem' );      curl_setopt( $ch ,curlopt_sslcerttype, 'pem' );      //一个保存着1个或多个用来让服务端验证的证书的文件名。这个参数仅仅在和 curlopt_ssl_verifypeer 一起使用时才有意义。 .      // curl_setopt($ch,curlopt_cainfo,getcwd().'/cert/rootca.pem');      curl_setopt( $ch ,curlopt_post,1);      curl_setopt( $ch ,curlopt_postfields, $xml );      $data =curl_exec( $ch );      if ( $data ){        curl_close( $ch );        $data_arr = json_decode(json_encode(simplexml_load_string( $data , 'simplexmlelement' , libxml_nocdata)), true);        return $data_arr ;      } else {        $error =  curl_errno( $ch );        return "curl 错误:" . $error ;      }    }                  // +----------------------------------------------------------------------    // | 企业付款    //  退款单号 out_trade_no    //  交易金额 total_fee    //  退款金额 refund_fee    // +----------------------------------------------------------------------    public function payment( $partner_trade_no , $openid , $amount , $desc ){        // 获取      $arr [ 'mch_appid' ]      =  $this ->wechatappid;      $arr [ 'mchid' ]        =  $this ->wechatmchid;      $arr [ 'nonce_str' ]      =  $this ->getnoncestr();      $arr [ 'partner_trade_no' ]  =  $partner_trade_no ;      $arr [ 'openid' ]       =  $openid ;      $arr [ 'check_name' ]     =  "no_check" ;      $arr [ 'amount' ]       =  $amount *100;      $arr [ 'desc' ]        =  $desc ;      $arr [ 'spbill_create_ip' ]  =  request()->ip();      $arr [ 'sign' ]        =  $this ->makesign( $arr );        //将统一下单数组 转换xml      $xml            =  $this ->toxml( $arr );        //post xml 到微信退款接口      $url  =  "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers" ;//微信退款地址，post请求      $ch =curl_init();      //需要获取的url地址，也可以在 curl_init() 函数中设置。      curl_setopt( $ch ,curlopt_url, $url );      //启用时会将头文件的信息作为数据流输出。      //curl_setopt($ch,curlopt_header,1);      //将 curl_exec() 获取的信息以文件流的形式返回，而不是直接输出。      curl_setopt( $ch ,curlopt_returntransfer,1);      //证书检查      curl_setopt( $ch ,curlopt_ssl_verifypeer,false);      //证书的类型。支持的格式有"pem" (默认值), "der"和"eng"。      curl_setopt( $ch ,curlopt_sslcerttype, 'pem' );      //一个包含pem格式证书的文件名。      curl_setopt( $ch ,curlopt_sslcert,gen. '/cert/apiclient_cert.pem' );      curl_setopt( $ch ,curlopt_sslcerttype, 'pem' );      curl_setopt( $ch ,curlopt_timeout,30);      //包含ssl私钥的文件名。      curl_setopt( $ch ,curlopt_sslkey,gen. '/cert/apiclient_key.pem' );      curl_setopt( $ch ,curlopt_sslcerttype, 'pem' );      //一个保存着1个或多个用来让服务端验证的证书的文件名。这个参数仅仅在和 curlopt_ssl_verifypeer 一起使用时才有意义。 .      // curl_setopt($ch,curlopt_cainfo,getcwd().'/cert/rootca.pem');      curl_setopt( $ch ,curlopt_post,1);      curl_setopt( $ch ,curlopt_postfields, $xml );      $data =curl_exec( $ch );      if ( $data ){        curl_close( $ch );        $data_arr = json_decode(json_encode(simplexml_load_string( $data , 'simplexmlelement' , libxml_nocdata)), true);        return $data_arr ;      } else {        $error =  curl_errno( $ch );        return "curl 错误:" . $error ;      }          }          // +----------------------------------------------------------------------    // |    post请求    // +----------------------------------------------------------------------    public function curlpost( $url , $post_data )    {      $ch = curl_init();      curl_setopt( $ch , curlopt_url, $url );      curl_setopt( $ch , curlopt_ssl_verifypeer, false);      curl_setopt( $ch , curlopt_ssl_verifyhost, false);      if (! empty ( $post_data )){        curl_setopt( $ch , curlopt_post, 1);        curl_setopt( $ch , curlopt_postfields, $post_data );      }      curl_setopt( $ch , curlopt_returntransfer, 1);      $output = curl_exec( $ch );        return $output ;    }    // +----------------------------------------------------------------------    // |    齐力短信    // +----------------------------------------------------------------------    public function message( $mobile ){        $info  =  m( 'web' )          ->  find();        $post_data = array ();      $post_data [ 'userid' ]  =  $info [ 'message_id' ];      $post_data [ 'account' ]  =  $info [ 'message_account' ];      $post_data [ 'password' ] =  $info [ 'message_password' ];      $code = rand(1111,9999);      session( 'code' , $code );      $post_data [ 'content' ] =   $info [ 'message_autograph' ]. '您的验证码是：' . $code . ' 请务必保管好,以免泄露' ;      $post_data [ 'mobile' ] = $mobile ;      $post_data [ 'sendtime' ] = date ( 'y-m-d' );      $url = 'http://pt.sdqlweb.com/sms.aspx?action=send' ;      $o = '' ;      foreach ( $post_data as $k => $v )      {      $o .= "$k=" .urlencode( $v ). '&' ;      }      $post_data = substr ( $o ,0,-1);      $ch = curl_init();      curl_setopt( $ch , curlopt_ssl_verifypeer, false);      curl_setopt( $ch , curlopt_ssl_verifyhost, false);      curl_setopt( $ch , curlopt_post, 1);      curl_setopt( $ch , curlopt_url, $url );      curl_setopt( $ch , curlopt_postfields, $post_data );      curl_setopt( $ch , curlopt_returntransfer, 1);      $data = curl_exec( $ch );      $data = json_decode(json_encode(simplexml_load_string( $data , 'simplexmlelement' , libxml_nocdata)), true);      curl_close( $ch );      return $data ;    }    // +----------------------------------------------------------------------    // |    以post方式提交xml到对应的接口url    // +----------------------------------------------------------------------    public function postxmlcurl( $xml , $url , $usecert = false, $second = 30)    {      $ch = curl_init();      //设置超时      curl_setopt( $ch , curlopt_timeout, $second );      curl_setopt( $ch ,curlopt_url, $url );      curl_setopt( $ch ,curlopt_ssl_verifypeer,false);      curl_setopt( $ch ,curlopt_ssl_verifyhost,2); //严格校验      //设置header      curl_setopt( $ch , curlopt_header, false);      //要求结果为字符串且输出到屏幕上      curl_setopt( $ch , curlopt_returntransfer, true);      //post提交方式      curl_setopt( $ch , curlopt_post, true);      curl_setopt( $ch , curlopt_postfields, $xml );      //运行curl      $data = curl_exec( $ch );      //返回结果      if ( $data ){        curl_close( $ch );        return $data ;      } else {        $error = curl_errno( $ch );        curl_close( $ch );      }    }    // +----------------------------------------------------------------------    // |    输出xml字符    // +----------------------------------------------------------------------    public function toxml( $array )    {      if (! is_array ( $array )        || count ( $array ) <= 0)      {        throw new wxpayexception( "数组数据异常！" );      }      $xml = "<xml>" ;      foreach ( $array as $key => $val )      {        if ( is_numeric ( $val )){          $xml .= "<" . $key . ">" . $val . "</" . $key . ">" ;        } else {          $xml .= "<" . $key . "><![cdata[" . $val . "]]></" . $key . ">" ;        }      }      $xml .= "</xml>" ;      return $xml ;    }    // +----------------------------------------------------------------------    // |    获取微信ras公钥    // +----------------------------------------------------------------------    public function get_pub_key(){        $url        =  "https://fraud.mch.weixin.qq.com/risk/getpublickey" ;      $arr [ 'mch_id' ]   =  $this ->wechatmchid;      $arr [ 'nonce_str' ]  =  $this ->getnoncestr();      $arr [ 'sign_type' ]  =  'md5' ;      $arr [ 'sign' ]    =  $this ->makesign( $arr );      $xml        =  $this ->toxml( $arr );      $ch =  curl_init();      curl_setopt( $ch ,curlopt_url, $url );      curl_setopt( $ch ,curlopt_returntransfer,1);      curl_setopt( $ch ,curlopt_ssl_verifypeer,1);      curl_setopt( $ch ,curlopt_sslcerttype, 'pem' );      curl_setopt( $ch ,curlopt_sslcert, getcwd (). '/cert/apiclient_cert.pem' );      curl_setopt( $ch ,curlopt_sslcerttype, 'pem' );      curl_setopt( $ch ,curlopt_sslkey, getcwd (). '/cert/apiclient_key.pem' );      curl_setopt( $ch ,curlopt_sslcerttype, 'pem' );      curl_setopt( $ch ,curlopt_cainfo, getcwd (). '/cert/rootca.pem' );      curl_setopt( $ch ,curlopt_post,1);      curl_setopt( $ch ,curlopt_postfields, $xml );      $data  =  $this ->fromxml(curl_exec( $ch ));      //要创建的两个文件      $txtfilename = "./cert/public.pem" ;      //以读写方式打写指定文件，如果文件不存则创建      if ( ( $txtres = fopen ( $txtfilename , "w+" )) === false){        echo ( "创建可写文件：" . $txtfilename . "失败" );        exit ();      }        echo ( "创建可写文件" . $txtfilename . "成功！</br>" );        $strconents =  $data [ 'pub_key' ]; //要 写进文件的内容      if (!fwrite ( $txtres , $strconents )){ //将信息写入文件        echo ( "尝试向文件" . $txtfilename . "写入" . $strconents . "失败！" );        fclose( $txtres );        exit ();      }        echo ( "尝试向文件" . $txtfilename . "写入" . $strconents . "成功！" );        fclose ( $txtres ); //关闭指针    }    // +----------------------------------------------------------------------    // |    将xml转为array    // +----------------------------------------------------------------------    public function fromxml( $xml )    {      //禁止引用外部xml实体      libxml_disable_entity_loader(true);      $this ->values = json_decode(json_encode(simplexml_load_string( $xml , 'simplexmlelement' , libxml_nocdata)), true);      return $this ->values;    }    // +----------------------------------------------------------------------    // |    微信银行卡编码    // +----------------------------------------------------------------------    public function cardcode( $card_name )    {      $arr  =  array (        '工商银行' =>1002,        '农业银行' =>1005,        '中国银行' =>1026,        '建设银行' =>1003,        '招商银行' =>1001,        '邮储银行' =>1066,        '交通银行' =>1020,        '浦发银行' =>1004,        '民生银行' =>1006,        '兴业银行' =>1009,        '平安银行' =>1010,        '中信银行' =>1021,        '华夏银行' =>1025,        '广发银行' =>1027,        '光大银行' =>1022,        '北京银行' =>1032,        '宁波银行' =>1056      );        foreach ( $arr as $k => $v ){        if ( $k == $card_name ){          return $v ;        }      }    }    // +----------------------------------------------------------------------    // |    格式化参数格式化成url参数    // +----------------------------------------------------------------------    public function tourlparams( $array )    {      $buff = "" ;      foreach ( $array as $k => $v )      {        if ( $k != "sign" && $v != "" && ! is_array ( $v )){          $buff .= $k . "=" . $v . "&" ;        }      }      $buff = trim( $buff , "&" );      return $buff ;    }    // +----------------------------------------------------------------------    // |    生成签名 本函数不覆盖sign成员变量，如要设置签名需要调用setsign方法赋值    // +----------------------------------------------------------------------    public function makesign( $array )    {      //签名步骤一：按字典序排序参数      ksort( $array );      $string =  $this ->tourlparams( $array );      //签名步骤二：在string后加入key      $string =  $string . "&key=" . $this ->wechatprivatekey;      //签名步骤三：md5加密      $string =  md5( $string );      //签名步骤四：所有字符转为大写      $string =  strtoupper ( $string );      return $string ;    }    // +----------------------------------------------------------------------    // |    产生的随机字符串    // +----------------------------------------------------------------------    public function getnoncestr( $length = 32)    {      $chars = "abcdefghijklmnopqrstuvwxyz0123456789" ;      $str = "" ;      for ( $i = 0; $i < $length ; $i ++ ) {        $str .= substr ( $chars , mt_rand(0, strlen ( $chars )-1), 1);      }      return $str ;    }    // +----------------------------------------------------------------------    // |    打印log日志    // +----------------------------------------------------------------------    public function save_log( $msg ){      error_log ( date ( "y-m-d h:i:s" ). "\r\n" .print_r( $msg ,1). "\r\n \r\n \r\n " ,3, './error.log' );    }    // +----------------------------------------------------------------------    // |    将图片上传至微信服务器    // +----------------------------------------------------------------------    public function curlimg( $images ){        $url    =  "https://api.weixin.qq.com/cgi-bin/material/add_material?access_token=" . $this ->getaccesstoken(). "&type=image" ;      $ch1    =  curl_init ();      $timeout  =  5;      $real_path =  "{$_server['document_root']}{$images}" ;        $data = array ( "media" => "@{$real_path}" , 'form-data' => $file_info );      curl_setopt ( $ch1 , curlopt_url, $url );      curl_setopt ( $ch1 , curlopt_post, 1 );      curl_setopt ( $ch1 , curlopt_returntransfer, 1 );      curl_setopt ( $ch1 , curlopt_connecttimeout, $timeout );      curl_setopt ( $ch1 , curlopt_ssl_verifypeer, false );      curl_setopt ( $ch1 , curlopt_ssl_verifyhost, false );      curl_setopt ( $ch1 , curlopt_postfields, $data );      $result = curl_exec ( $ch1 );      curl_close ( $ch1 );      if (curl_errno()==0){        $result =json_decode( $result ,true);        return $result ;      } else {        return false;      }    }    // +----------------------------------------------------------------------    // |    将文章转换为微信文章    // +----------------------------------------------------------------------    public function wechattext( $content ){      $parrent = "/<[img|img].*?src='(.*?)'/" ;      $str  =  html_entity_decode( $content );      preg_match_all( $parrent , $str , $match );      foreach ( $match [1] as $v ){        $imgurl   =  $this ->curlimg( $v );        $content  =  str_replace ( $v , $imgurl [ 'url' ], $content );      }      return ( $content );    }    // +----------------------------------------------------------------------    // |    验证银行卡号    // +----------------------------------------------------------------------     public function check_bank_card( $card ){          $url  =  "https://ccdcapi.alipay.com/validateandcachecardinfo.json?_input_charset=utf-8&cardno={$card}&cardbincheck=true" ;        $data  =  $this ->curlget( $url );        $name  =  [            "srcb" => "深圳农村商业银行" ,            "bgb" => "广西北部湾银行" ,            "shrcb" => "上海农村商业银行" ,            "bjbank" => "北京银行" ,            "whccb" => "威海市商业银行" ,            "bozk" => "周口银行" ,            "korlabank" => "库尔勒市商业银行" ,            "spabank" => "平安银行" ,            "sdeb" => "顺德农商银行" ,            "hurcb" => "湖北省农村信用社" ,            "wrcb" => "无锡农村商业银行" ,            "bocy" => "朝阳银行" ,            "czbank" => "浙商银行" ,            "hdbank" => "邯郸银行" ,            "boc" => "中国银行" ,            "bod" => "东莞银行" ,            "ccb" => "中国建设银行" ,            "zycbank" => "遵义市商业银行" ,            "sxcb" => "绍兴银行" ,            "gzrcu" => "贵州省农村信用社" ,            "zjkccb" => "张家口市商业银行" ,            "bojz" => "锦州银行" ,            "bop" => "平顶山银行" ,            "hkb" => "汉口银行" ,            "spdb" => "上海浦东发展银行" ,            "nxrcu" => "宁夏黄河农村商业银行" ,            "nynb" => "广东南粤银行" ,            "grcb" => "广州农商银行" ,            "bosz" => "苏州银行" ,            "hzcb" => "杭州银行" ,            "hsbk" => "衡水银行" ,            "hbc" => "湖北银行" ,            "jxbank" => "嘉兴银行" ,            "hrxjb" => "华融湘江银行" ,            "bodd" => "丹东银行" ,            "aycb" => "安阳银行" ,            "egbank" => "恒丰银行" ,            "cdb" => "国家开发银行" ,            "tcrcb" => "江苏太仓农村商业银行" ,            "njcb" => "南京银行" ,            "zzbank" => "郑州银行" ,            "dycb" => "德阳商业银行" ,            "ybccb" => "宜宾市商业银行" ,            "scrcu" => "四川省农村信用" ,            "klb" => "昆仑银行" ,            "lsbank" => "莱商银行" ,            "ydrcb" => "尧都农商行" ,            "ccqtgb" => "重庆三峡银行" ,            "fdb" => "富滇银行" ,            "jsrcu" => "江苏省农村信用联合社" ,            "jnbank" => "济宁银行" ,            "cmb" => "招商银行" ,            "jinchb" => "晋城银行jcbank" ,            "fxcb" => "阜新银行" ,            "whrcb" => "武汉农村商业银行" ,            "hbycbank" => "湖北银行宜昌分行" ,            "tzcb" => "台州银行" ,            "taccb" => "泰安市商业银行" ,            "xcyh" => "许昌银行" ,            "ceb" => "中国光大银行" ,            "nxbank" => "宁夏银行" ,            "hsbank" => "徽商银行" ,            "jjbank" => "九江银行" ,            "nhqs" => "农信银清算中心" ,            "mtbank" => "浙江民泰商业银行" ,            "langfb" => "廊坊银行" ,            "ascb" => "鞍山银行" ,            "ksrb" => "昆山农村商业银行" ,            "yxccb" => "玉溪市商业银行" ,            "dlb" => "大连银行" ,            "drcbcl" => "东莞农村商业银行" ,            "gcb" => "广州银行" ,            "nbbank" => "宁波银行" ,            "boyk" => "营口银行" ,            "sxrccu" => "陕西信合" ,            "glbank" => "桂林银行" ,            "boqh" => "青海银行" ,            "cdrcb" => "成都农商银行" ,            "qdccb" => "青岛银行" ,            "hkbea" => "东亚银行" ,            "hbhsbank" => "湖北银行黄石分行" ,            "wzcb" => "温州银行" ,            "trcb" => "天津农商银行" ,            "qlbank" => "齐鲁银行" ,            "gdrcc" => "广东省农村信用社联合社" ,            "zjtlcb" => "浙江泰隆商业银行" ,            "gzb" => "赣州银行" ,            "gycb" => "贵阳市商业银行" ,            "cqbank" => "重庆银行" ,            "daqingb" => "龙江银行" ,            "cgnb" => "南充市商业银行" ,            "sccb" => "三门峡银行" ,            "csrcb" => "常熟农村商业银行" ,            "shbank" => "上海银行" ,            "jlbank" => "吉林银行" ,            "czrcb" => "常州农村信用联社" ,            "bankwf" => "潍坊银行" ,            "zrcbank" => "张家港农村商业银行" ,            "fjhxbc" => "福建海峡银行" ,            "zjnx" => "浙江省农村信用社联合社" ,            "lzyh" => "兰州银行" ,            "jsb" => "晋商银行" ,            "bohaib" => "渤海银行" ,            "czcb" => "浙江稠州商业银行" ,            "yqccb" => "阳泉银行" ,            "sjbank" => "盛京银行" ,            "xabank" => "西安银行" ,            "bsb" => "包商银行" ,            "jsbank" => "江苏银行" ,            "fscb" => "抚顺银行" ,            "hnrcu" => "河南省农村信用" ,            "comm" => "交通银行" ,            "xtb" => "邢台银行" ,            "citic" => "中信银行" ,            "hxbank" => "华夏银行" ,            "hnrcc" => "湖南省农村信用社" ,            "dyccb" => "东营市商业银行" ,            "orbank" => "鄂尔多斯银行" ,            "bjrcb" => "北京农村商业银行" ,            "xybank" => "信阳银行" ,            "zgccb" => "自贡市商业银行" ,            "cdcb" => "成都银行" ,            "hanabank" => "韩亚银行" ,            "cmbc" => "中国民生银行" ,            "lybank" => "洛阳银行" ,            "gdb" => "广东发展银行" ,            "zbcb" => "齐商银行" ,            "cbkf" => "开封市商业银行" ,            "h3cb" => "内蒙古银行" ,            "cib" => "兴业银行" ,            "crcbank" => "重庆农村商业银行" ,            "szsbk" => "石嘴山银行" ,            "dzbank" => "德州银行" ,            "srbank" => "上饶银行" ,            "lsccb" => "乐山市商业银行" ,            "jxrcu" => "江西省农村信用" ,            "icbc" => "中国工商银行" ,            "jzbank" => "晋中市商业银行" ,            "hzccb" => "湖州市商业银行" ,            "nhb" => "南海农村信用联社" ,            "xxbank" => "新乡银行" ,            "jrcb" => "江苏江阴农村商业银行" ,            "ynrcc" => "云南省农村信用社" ,            "abc" => "中国农业银行" ,            "gxrcu" => "广西省农村信用" ,            "psbc" => "中国邮政储蓄银行" ,            "bzmd" => "驻马店银行" ,            "arcu" => "安徽省农村信用社" ,            "gsrcu" => "甘肃省农村信用" ,            "lycb" => "辽阳市商业银行" ,            "jlrcu" => "吉林农信" ,            "urmqccb" => "乌鲁木齐市商业银行" ,            "xlbank" => "中山小榄村镇银行" ,            "cscb" => "长沙银行" ,            "jhbank" => "金华银行" ,            "bhb" => "河北银行" ,            "nbyz" => "鄞州银行" ,            "lsbc" => "临商银行" ,            "bocd" => "承德银行" ,            "sdrcu" => "山东农信" ,            "ncb" => "南昌银行" ,            "tccb" => "天津银行" ,            "wjrcb" => "吴江农商银行" ,            "cbbqs" => "城市商业银行资金清算中心" ,            "hbrcu" => "河北省农村信用社"         ];            $bank  =  $data [ 'bank' ];        $name  =  $name [ $bank ];        if ( $name ){          if ( $bank ){            $url1      = "https://apimg.alipay.com/combo.png?d=cashier&t={$bank}" ;            $msg [ 'pic' ]   =  $this ->curldownload( $url1 ,time(). '.png' );            $msg [ 'logo' ]  =  $this ->imagecropper( '.' . $msg [ 'pic' ],30,35);            $msg [ 'status' ] = 200;            $msg [ 'name' ] = $name ;            return $msg ;          }        } else {          $msg [ 'status' ] = 500;          $msg [ 'data' ] = '系统检测到该银行卡无效，请输入有效银行卡卡号' ;          return $msg ;        }        }   /** * 图像裁剪 * @param $title string 原图路径 * @param $content string 需要裁剪的宽 * @param $encode string 需要裁剪的高 */      public function imagecropper( $source_path , $target_width , $target_height ){          $source_info = getimagesize ( $source_path );        $source_width = $source_info [0];        $source_height = $source_info [1];        $source_mime = $source_info [ 'mime' ];        $source_x = 0;        $source_y = 0;        switch ( $source_mime )        {          case 'image/gif' :          $source_image = imagecreatefromgif( $source_path );          break ;            case 'image/jpeg' :          $source_image = imagecreatefromjpeg( $source_path );          break ;            case 'image/png' :          $source_image = imagecreatefrompng( $source_path );          break ;            default :          return false;          break ;        }        $target_image = imagecreatetruecolor( $target_width , $target_height );        $cropped_image = imagecreatetruecolor( $target_width , $target_height );        // 裁剪        imagecopy( $cropped_image , $source_image ,0,0, $source_x , $source_y , $target_width , $target_height );        // 缩放        imagecopyresampled( $target_image , $cropped_image , 0, 0, 0, 0, $target_width , $target_height , $target_width , $target_height );        imagecolortransparent( $target_image ,imagecolorallocate( $target_image ,255,255,255));        $filename = time(). "1.png" ;        $path  =  './uploads/card/' . $filename ;        imagepng( $target_image , $path );        return '/uploads/card/' . $filename ;      }          // 随机字符      public function noncestr( $length = 12){        $chars = "0123456789abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz" ;        $str = "" ;        for ( $i = 0; $i < $length ; $i ++ ) {          $str .= substr ( $chars , mt_rand(0, strlen ( $chars )-1), 1);        }        return $str ;      }   } ?>

下面是其他网友的补充

php获取小程序码并返回前端显示图片

小程序的二维码分为小程序码和二维码；
生成小程序二维码文档中说后端来生成。

参考 小程序开发文档资料：https://developers.weixin.qq.com/miniprogram/dev/api/getwxacodeunlimit.html

文档的参数介绍还是蛮详细的，但是没有具体的demo,对于请求的接口的返回值是进制流（也就是在浏览器显示一堆乱码）也是很令人懊恼，这里贴一下我的代码：

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//获取小程序码，这里调用的是小程序码的a接口类型    public function getqrcodeaction()    {      $data [ 'scene' ] = $this ->_req->getquery( 'shareid' ,11); //scence、page的使用要参考文档(比如：scene的值不能超过32个字符等）      $data [ 'width' ] = $this ->_req->getquery( 'width' ,220);      $data [ 'auto_color' ] = $this ->_req->getquery( 'auto_color' );      $data [ 'line_color' ] = $this ->_req->getquery( 'line_color' );      $data [ 'is_hyaline' ] = $this ->_req->getquery( 'is_hyaline' ,true);      $data [ 'page' ] = $this ->_req->getquery( 'page' , "" );  //由这行以上代码是二维码的样式等由前端传值的形式，也可以直接在后端设置      $wxmodel = new wxauthmodel();      $token = $wxmodel ->getaccesstoken();      $res_url = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=$token" ; //请求微信提供的接口      header( 'content-type:image/png' );      $data = json_encode( $data );      $qr_code = $wxmodel ->http_request( $res_url , $data ); //到这里就已经返回微信提供的返回数据了，这个时候的数据是二进制流，要处理下再返回给前端      file_put_contents ( '/tmp/qr_code.png' , $qr_code ); //将获得的数据读到一个临时图片里      $img_string = $this ->filetobase64( '/tmp/qr_code.png' ); //将图片文件转化为base64      response::result( $img_string );    }      //本地文件转base64    private function filetobase64( $file ){      $base64_file = '' ;      if ( file_exists ( $file )){        $mime_type = mime_content_type( $file ); //如果这里明确是图片的话我建议获取图片类型这句可以省略，直接知道了mine_type='image/png'，因为我这里我虽然存的图片，但是读到的mine_type值为text/plain        $base64_data = base64_encode ( file_get_contents ( $file ));        $base64_file = 'data:' . $mime_type . ';base64,' . $base64_data ; //$base64_file = 'data:image/png;base64,'.$base64_data;      }      return $base64_file ;    }       /*获取access_token,不需要code参数，不能用于获取用户信息的token*/    public function getaccesstoken()    {      $token_file = '/dev/shm/heka2_token.json' ; //由于获取token的次数存在限制，所以将一段时间内的token缓存到一个文件（注意缓存路径服务器支持可写可读），过期后再重新获取      $data = json_decode( file_get_contents ( $token_file ));      if ( $data ->expire_time < time()) {        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appid&secret=$this->appsecret" ;        $res = json_decode( $this ->http_request( $url ));        $access_token = $res ->access_token;        if ( $access_token ) {          $data ->expire_time = time() + 7000;          $data ->access_token = $access_token ;          file_put_contents ( $token_file , json_encode( $data ));        }      } else {        $access_token = $data ->access_token;      }      return $access_token ;    }

感觉一个完整的php实现的代码目前我还没找到，这个自己用的还行。如有不恰当的地方，欢迎指出~ _

原文链接：https://www.cnblogs.com/zmdComeOn/p/13085394.html