TP5报错：Array and string offset access syntax with curly braces is deprecated

报错语句：Array and string offset access syntax with curly braces is deprecated

报错原因：PHP7+更高版本不再支持使用花括号访问数组以及字符串的偏移

文件路径：thinkphp\library\think\db\Query.php [第400行]

代码原句：$seq = (ord($value{0}) % $rule['num']) + 1;

改后代码：$seq = (ord($value[0]) % $rule['num']) + 1;