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

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

/**
   * 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

<?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={$nonceStr}×tamp={$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：

//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~ _