Now that the verification has passed, the only thing left is to return it to WeChat. If I return echostr or true, WeChat says my token verification failed

param(); $timestamp = $get['timestamp'];//timestamp其实就是一个时间戳 $nonce = $get['nonce'];//nonce是一个随机参数 $token = "";//这个token填写你在微信公众平台上写的那个值 $signature = $get['signature'];//这个signature其实就是在微信公众平台已经加密好的字符串 $echostr = $get['echostr']; $array = array(); $array = array($token,$timestamp,$nonce); sort($array); $tmpstr = sha1(implode('',$array)); if($tmpstr == $signature){ echo $get['echostr']; }else{ return false; } } }