<?php
 namespace TechOnline\Utils; class SignUtil { public static function check($sign, $params, $appSecret) { if ($sign == self::common($params, $appSecret)) { return true; } if ($sign == self::common($params, $appSecret, 'urlencode')) { return true; } if ($sign == self::common($params, $appSecret, 'rawurlencode')) { return true; } return false; } public static function common($params, $appSecret, $function = 'trim', $appSecretName = 'app_secret') { ksort($params, SORT_STRING); $str = []; foreach ($params as $k => $v) { $str [] = $k . '=' . $function($v); } $str[] = $appSecretName . '=' . $appSecret; $str = join('&', $str); $sign = md5($str); return $sign; } public static function checkWithoutSecret($sign, $params, $prefix = null) { if ($sign == self::commonWithoutSecret($params, $prefix)) { return true; } if ($sign == self::commonWithoutSecret($params, $prefix, 'rawurlencode')) { return true; } return false; } public static function commonWithoutSecret($params, $prefix = null, $function = 'urlencode') { ksort($params, SORT_STRING); $str = []; foreach ($params as $k => $v) { $str [] = $k . '=' . $function($v); } $str = join('&', $str); if ($prefix) { $str = $prefix . '&' . $str; } $sign = md5($str); return $sign; } }