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={$noncestr}&timestamp={$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：

//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