php生成带参数的微信小程序二维码

<?php

header('content-type:text/html;charset=utf-8');

//配置APPID、APPSECRET

$APPID = "你的appid";

$APPSECRET = "你的APPSECRET";

if(!empty($_GET['id'])){

    $params = "?id=".$_GET['id'];

}else{

    $params = '';

}

//获取access_token

$access_token = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$APPID&secret=$APPSECRET";

//缓存access_token

session_start();

$_SESSION['access_token'] = "";

$_SESSION['expires_in'] = 0;

$ACCESS_TOKEN = "";

if (!isset($_SESSION['access_token']) || (isset($_SESSION['expires_in']) && time() > $_SESSION['expires_in'])) {

    $json = httpRequest($access_token);

    $json = json_decode($json, true);

    $_SESSION['access_token'] = $json['access_token'];

    $_SESSION['expires_in'] = time() + 7200;

    $ACCESS_TOKEN = $json["access_token"];

} else {

    $ACCESS_TOKEN = $_SESSION["access_token"];

}

//构建请求二维码参数

//path是扫描二维码跳转的小程序路径，可以带参数?id=xxx

//width是二维码宽度

$qcode = "https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=$ACCESS_TOKEN";

$param = json_encode(array("path" => "lionfish_comshop/pages/index/index".$params, "width" => 150));

//POST参数

$result = httpRequest($qcode, $param, "POST");

//生成二维码

file_put_contents("qrcode.png", $result);

$base64_image = "data:image/jpeg;base64," . base64_encode($result);

//把请求发送到微信服务器换取二维码

function httpRequest($url, $data = '', $method = 'GET'){

    $curl = curl_init();

    curl_setopt($curl, CURLOPT_URL, $url);

    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);

    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);

    curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);

    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);

    curl_setopt($curl, CURLOPT_AUTOREFERER, 1);

    if ($method == 'POST') {

        curl_setopt($curl, CURLOPT_POST, 1);

        if ($data != '') {

            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);

        }

    }

    curl_setopt($curl, CURLOPT_TIMEOUT, 30);

    curl_setopt($curl, CURLOPT_HEADER, 0);

    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

    $result = curl_exec($curl);

    curl_close($curl);

    return $result;

}

?>

<img src="<?php echo $base64_image; ?>"/>