初始化代码

application/common/yun/util/StringUtil.php

@@ -0,0 +1,17 @@
+<?php
+namespace app\common\yun\util;
+class StringUtil
+{
+    public static function round($len = 6)
+    {
+        $str = 'a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9';
+        $arr = explode(' ', $str);
+        $rand_keys = array_rand($arr, $len);
+        shuffle($rand_keys);
+        $code = '';
+        foreach ($rand_keys as $index=>$key){
+            $code .= $arr[$key];
+        }
+        return $code;
+    }
+}