From dc3fa3bdacb281e5277a87e577c143eb52dd47fb Mon Sep 17 00:00:00 2001
From: liugang <liugang@chandao.com>
Date: Thu, 20 Nov 2025 15:57:38 +0800
Subject: [PATCH] + [refac] Add a method to get the server charset and
 collation.

---
 lib/dbh/dbh.class.php | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/lib/dbh/dbh.class.php b/lib/dbh/dbh.class.php
index 90a37695e8..f0322bc77c 100644
--- a/lib/dbh/dbh.class.php
+++ b/lib/dbh/dbh.class.php
@@ -486,6 +486,24 @@ class dbh
         return $collations['utf8mb4_uca1400_ai_ci'] ?? $collations['utf8mb4_0900_ai_ci'] ?? $collations['utf8mb4_unicode_ci'] ?? 'utf8mb4_general_ci';
     }
 
+    /**
+     * 获取服务器支持的字符集和排序规则。
+     * Get the server charset and collation.
+     *
+     * @access private
+     * @return array
+     */
+    private function getServerCharsetAndCollation(): array
+    {
+        if($this->dbConfig->driver != 'mysql') return ['charset' => 'utf8', 'collation' => ''];
+
+        $charsets  = [];
+        $statement = $this->rawQuery("SHOW CHARSET WHERE Charset LIKE 'utf8%';");
+        while($charset = $statement->fetch(PDO::FETCH_ASSOC)) $charsets[$charset['Charset']] = ['charset' => $charset['Charset'], 'collation' => $charset['Default collation']];
+
+        return $charsets['utf8mb4'] ?? $charsets['utf8mb3'] ?? ['charset' => 'utf8', 'collation' => 'utf8_general_ci'];
+    }
+
     /**
      * Create database.
      *