Initial Upload

lib/Helper/Random.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * Copyright (C) 2020 Xibo Signage Ltd
+ *
+ * Xibo - Digital Signage - http://www.xibo.org.uk
+ *
+ * This file is part of Xibo.
+ *
+ * Xibo is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * Xibo is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Xibo.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Xibo\Helper;
+
+/**
+ * Class Random
+ * @package Xibo\Helper
+ */
+class Random
+{
+    /**
+     * @param int $length
+     * @param string $prefix
+     * @return string
+     * @throws \Exception
+     */
+    public static function generateString($length = 10, $prefix = '')
+    {
+        if (function_exists('random_bytes')) {
+            return substr($prefix . bin2hex(random_bytes($length)), 0, $length + strlen($prefix));
+        } else {
+            $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+            $charactersLength = strlen($characters);
+            $randomString = '';
+            for ($i = 0; $i < $length; $i++) {
+                $randomString .= $characters[rand(0, $charactersLength - 1)];
+            }
+            return $prefix . $randomString;
+        }
+    }
+}