Fatal error: Out of memory (allocated 2097152) (tried to allocate 20480 bytes) in C:\phpstudy_pro\WWW\pengmingcs\thinkphp\library\think\db\connector\Mysql.php on line 72

Fatal error: Out of memory (allocated 2097152) (tried to allocate 20480 bytes) in C:\phpstudy_pro\WWW\pengmingcs\thinkphp\library\think\Error.php on line 86