<?php
$channel = 'a?wxpay?a';
$channel = explode("?",$channel)[0];
echo $channel;
$channelInfo   = '';
$notifyIps  = explode(',',trim($channelInfo));
if($notifyIps && !in_array(99,$notifyIps))
{
    echo 1;
}else{
    echo 2;
}