feature: added epay & mGate payment

library/Epay.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Library;
+
+class Epay
+{
+    private $pid;
+    private $key;
+    private $url;
+
+    public function __construct($url, $pid, $key)
+    {
+        $this->pid = $pid;
+        $this->key = $key;
+        $this->url = $url;
+    }
+
+    public function pay($params)
+    {
+        $params['pid'] = $this->pid;
+        ksort($params);
+        reset($params);
+        $str = stripslashes(urldecode(http_build_query($params))) . $this->key;
+        $params['sign'] = md5($str);
+        $params['sign_type'] = 'MD5';
+        return $this->url . '/submit.php?' . http_build_query($params);
+    }
+
+    public function verify($params)
+    {
+        $sign = $params['sign'];
+        unset($params['sign']);
+        unset($params['sign_type']);
+        ksort($params);
+        reset($params);
+        $str = stripslashes(urldecode(http_build_query($params))) . $this->key;
+        if ($sign !== md5($str)) {
+            return false;
+        }
+        return true;
+    }
+}