<?php
$str = "openid+";
print_r (explode("+",$str));
?>

https://open.weixin.qq.com/connect/oauth2/authorize?appid=wwce49066b07c69c75&redirect_uri=https://auth.laysense.cn/&response_type=code&scope=snsapi_privateinfo&state=STATE&agentid=1000008#wechat_redirect