<?php

getwxacode();

    //生成二维码
    function getwxacode(){
        $url = "https://api.weixin.qq.com/wxa/getwxacode?";
        $url .= "access_token=" . getToken();
        $postdata = [
            "path" => "pages/index/index?clientId=3",
            "width" => 430,
        ];

        $res = curl_post($url,json_encode($postdata),$options=array());
        $img = ‘./img/‘.time().‘.jpg‘;
        $r = file_put_contents($img,$res);
        echo "<img src=‘".$img."‘>";

    }


    //发送获取token请求,获取token(2小时)
    function getToken() {
        $url = getTokenUrlStr();
        $res = curl_post($url,$postdata=‘‘,$options=array());

        $data = json_decode($res,JSON_FORCE_OBJECT);
        return $data[‘access_token‘];
    }

    //获取token的url参数拼接
    function getTokenUrlStr()
    {
        $getTokenUrl = "https://api.weixin.qq.com/cgi-bin/token?"; //获取token的url
        $WXappid     =  "wx0399845015067c51"; //APPID
        $WXsecret    = "7d7205f85b79805006ecfa2121ef4272"; //secret
        $str  = $getTokenUrl;
        $str .= "grant_type=client_credential&";
        $str .= "appid=" . $WXappid . "&";
        $str .= "secret=" . $WXsecret;

        return $str;
    }

    function curl_post($url=‘‘,$postdata=‘‘,$options=array()){
        $ch=curl_init($url);
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
        curl_setopt($ch,CURLOPT_POST,1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
        curl_setopt($ch, CURLOPT_TIMEOUT, 5);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        if(!empty($options)){
            curl_setopt_array($ch, $options);
        }
        $data=curl_exec($ch);
        curl_close($ch);
        return $data;
    }

    function curl_get($url=‘‘,$options=array()){
        $ch=curl_init($url);
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
        curl_setopt($ch,CURLOPT_TIMEOUT,5);
        if(!empty($options)){
            curl_setopt_array($ch,$options);
        }
        $data=curl_exec($ch);
        curl_close($ch);
        return $data;
    }

php小程序生成二维码