微信JS API PHP类

CURL操作类:

<?php
namespace app\common;

class curl{
    public static function wxcurl($getUrl){

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $getUrl);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        $data = curl_exec($ch);
        $response = json_decode($data,true);
        return $response;
    }
}

PHP类

直接写入的是缓存，如果你本地不支持redis缓存 需要修改存储方式

<?php
namespace app\common;
use app\common\Curl;

/**
 * @property  secret
 */
class Wechat{
	private $appid;
	private $secret;
        private $url;
	private $urlaccesstoken="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential";
	private $urljsapi_ticket = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=";
	function __construct($appid,$secret,$url){
		$this->appid=$appid;
		$this->secret =$secret;
                $this->url = $url;
	}
	private function getToken(){
		$access_token = json_decode(\Yii::$app->redis->get('wechat_access_token'),true);
		$effective = false;
		if(!$access_token){
			$effective=true;
		}else{
			//验证时间
			if(time() -$access_token['times'] > 7200){
				$effective=true;
			}
		}
		if($effective){
			$oauthUrl = $this->urlaccesstoken."&appid=".$this->appid."&secret=".$this->secret;
			$codeinfo = curl::wxcurl($oauthUrl);
			$access_token = ["times"=>time(),"access_token"=>$codeinfo['access_token']];
			\Yii::$app->redis->set('wechat_access_token',json_encode($access_token,true));
		}
		return $access_token['access_token'];
	}
	private function getTicket(){
		$jsapi_ticket =json_decode(\Yii::$app->redis->get('wechat_jsapi_ticket'),true);
		$effective = false;
		if(!$jsapi_ticket){
			$effective=true;
		}else{
			//验证时间
			if(time() -$jsapi_ticket['times'] > 7200){
				$effective=true;
			}
		}
		if($effective){
			$access_token = $this->getToken();
			$oauthUrl = $this->urljsapi_ticket.$access_token;
			$codeinfo = curl::wxcurl($oauthUrl);
			$jsapi_ticket = ["times"=>time(),"ticket"=>$codeinfo['ticket']];

			\Yii::$app->redis->set('wechat_access_ticket',json_encode($jsapi_ticket,true));
		}
		return $jsapi_ticket['ticket'];
	}
	private function nonceStr($length=32){
		$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
		$str ="";
		for ( $i = 0; $i < $length; $i++ ) {
			$str.= substr($chars, mt_rand(0, strlen($chars)-1), 1);
		}
		return $str;
	}
	private function signature($Parameters){
		//拼接参数
		$arg  = "";
		foreach($Parameters as $key => $val)
		{

			$arg.=$key."=".$val."&";
		}
		//去掉最后一个&字符
		$arg = trim($arg,'&');
		if(get_magic_quotes_gpc())
		{
			$arg = stripslashes($arg);
		}
		return sha1($arg);
	}
	private function getAppid(){
		return $this->appid;
	}
	function getWechatJsConfig(){
		$time = time();
		$Parameters = [
			"jsapi_ticket"=>$this->getTicket(),
			"noncestr"=>$this->nonceStr(),
			"timestamp"=>"$time",
			"url"=>$this->url,
		];
		$return['appId'] = $this->getAppid();
		$return['timestamp'] = $Parameters['timestamp'];
		$return['nonceStr'] = $Parameters['noncestr'];
		$return['signature'] = $this->signature($Parameters);

		return $return;
	}
}

返回格式:

appId:"xxxxxxxxx",
nonceStr:"xxxxxxxxxxx",
signature:"xxxxxxxxxx",
timestamp:"1522083380",

JS页面

wx.config({
            debug: true,
            appId:res.appId,
            timestamp:res.timestamp,
            nonceStr:res.nonceStr,
            signature:res.signature,
            jsApiList: [
              'chooseImage',//拍照或从手机相册中选图接口
              'onMenuShareTimeline',
              'previewImage',//预览图片接口
              'uploadImage',//上传图片接口
              'downloadImage'//下载图片接口
            ]});