<?php
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//微信OAuth2授权
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$APPID = "wx70f6a7346ee842c0";
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$APPSECRET = "2d6c59de85e876b7eadebeba62e5417a";
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$code=empty($_REQUEST['code'])!=false ? "" : addslashes($_REQUEST['code']);
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if (isset($_COOKIE["openid"])){$openid=$_COOKIE["openid"];}else{$openid="";}
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if ($code!="") {
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//通过code换取网页授权access_token和openid
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$wxinfo=file_get_contents("https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$APPID."&secret=".$APPSECRET."&code=".$code."&grant_type=authorization_code");
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$wxinfo=json_decode($wxinfo,true);
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extract($wxinfo);
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if (empty($openid)==false){setcookie("openid",$openid, time()+3600*24*365);} //openid写入缓存
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//把state转为变量
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$state=empty($_REQUEST['state'])!=false ? "" : addslashes($_REQUEST['state']);
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if ($state!="" and $state!="[]") {
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$state=str_replace("\\","",$state);
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$state=json_decode($state, true); //把json格式转为数组
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extract($state); //把数组转为变量
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}
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}
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elseif ($openid=="") {
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$state=json_encode($_REQUEST); //把传入参数转为json格式
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//echo $state;exit;
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header("Location: https://open.weixin.qq.com/connect/oauth2/authorize?appid=".$APPID."&redirect_uri=https://".$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF']."&response_type=code&scope=snsapi_base&state=".$state."#wechat_redirect");
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exit;
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}
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?>
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