Warning: include_once(../source/class/class_core.php): failed to open stream: No such file or directory in C:\phpStudy\WWW\Discuz_X2.5_PHP7.0_SC_UTF8\utility\update.php on line 10

Warning: include_once(): Failed opening '../source/class/class_core.php' for inclusion (include_path='.;C:\php\pear') in C:\phpStudy\WWW\Discuz_X2.5_PHP7.0_SC_UTF8\utility\update.php on line 10

Warning: include_once(../source/function/function_core.php): failed to open stream: No such file or directory in C:\phpStudy\WWW\Discuz_X2.5_PHP7.0_SC_UTF8\utility\update.php on line 11

Warning: include_once(): Failed opening '../source/function/function_core.php' for inclusion (include_path='.;C:\php\pear') in C:\phpStudy\WWW\Discuz_X2.5_PHP7.0_SC_UTF8\utility\update.php on line 11

Fatal error: Uncaught Error: Class 'C' not found in C:\phpStudy\WWW\Discuz_X2.5_PHP7.0_SC_UTF8\utility\update.php:16 Stack trace: #0 {main} thrown in C:\phpStudy\WWW\Discuz_X2.5_PHP7.0_SC_UTF8\utility\update.php on line 16