微信H5支付，微信公众号以外浏览器唤起微信支付，页面，控制器，模型已经写好，换掉信息即可
public function notify(){
$xml = $GLOBALS['HTTP_RAW_POST_DATA'];
libxml_disable_entity_loader(true);
$arr= json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
if($arr['return_code']=='SUCCESS'){
$oid = $arr['out_trade_no'];
$da = Db::name('Order')->where('order_num',$oid)->find();
if($da['isfalse']==0){
Db::name('Order')->where('order_num',$oid)->update(['isfalse'=>1,'status'=>1]);
}
}
}
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