first commit

芳林公司项目/www.zhiyuanhelp.com/application/admin/service/ToolService.php

@@ -0,0 +1,75 @@
+<?php
+
+/*
+ * 工具服务类
+ * */
+
+namespace app\admin\service;
+
+
+class ToolService {
+
+    /**
+     * 获取文件后缀名
+     * @param $filename
+     * @return string
+     */
+    public static function getSuffix($filename) {
+        return strrchr($filename, '.');
+    }
+
+    /**
+     * 加密
+     * @param $data 加密内容
+     * @param $key  秘钥
+     * @return string
+     */
+    public static function encrypt($data, $key) {
+        $key = md5($key);
+        $x = 0;
+        $len = strlen($data);
+        $l = strlen($key);
+        list($char, $str) = ['', ''];
+        for ($i = 0; $i < $len; $i++) {
+            if ($x == $l) {
+                $x = 0;
+            }
+            $char .= $key{$x};
+            $x++;
+        }
+        for ($i = 0; $i < $len; $i++) {
+            $str .= chr(ord($data{$i}) + (ord($char{$i})) % 256);
+        }
+        return base64_encode($str);
+    }
+
+    /**
+     * 解密
+     * @param $data 解密内容
+     * @param $key  秘钥
+     * @return string
+     */
+    public static function decrypt($data, $key) {
+        $key = md5($key);
+        $x = 0;
+        $data = base64_decode($data);
+        $len = strlen($data);
+        $l = strlen($key);
+        list($char, $str) = ['', ''];
+        for ($i = 0; $i < $len; $i++) {
+            if ($x == $l) {
+                $x = 0;
+            }
+            $char .= substr($key, $x, 1);
+            $x++;
+        }
+        for ($i = 0; $i < $len; $i++) {
+            if (ord(substr($data, $i, 1)) < ord(substr($char, $i, 1))) {
+                $str .= chr((ord(substr($data, $i, 1)) + 256) - ord(substr($char, $i, 1)));
+            } else {
+                $str .= chr(ord(substr($data, $i, 1)) - ord(substr($char, $i, 1)));
+            }
+        }
+        return $str;
+    }
+}