OneBot: Leantime 改造版源码（BOM/Univer 表格/AI 接管/品牌替换等）

app/Core/Support/String/AlphaNumeric.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Leantime\Core\Support\String;
+
+/**
+ * @mixin \Illuminate\Support\Stringable
+ */
+class AlphaNumeric
+{
+    /**
+     * Cleans a string by removing special characters and optionally spaces.
+     *
+     * @param  bool  $removeSpaces  Whether to remove spaces from the string.
+     * @return callable A function that cleans a string based on the given parameter.
+     */
+    public function alphaNumeric($removeSpaces = false)
+    {
+        return function ($value) use ($removeSpaces) {
+            $cleaned = preg_replace('/[^A-Za-z0-9 ]/', '', (string) $value);
+
+            if ($removeSpaces) {
+                $cleaned = str_replace(' ', '', $cleaned);
+            } else {
+                // Step 2: Replace multiple spaces with a single space
+                $cleaned = preg_replace('/\s+/', ' ', $cleaned);
+            }
+
+            // Step 3: Trim leading and trailing spaces
+            $cleaned = trim($cleaned);
+
+            return $cleaned;
+        };
+    }
+}