The error log file (error.txt by default) is never created within c3.php.
Currently, is_writable() checks if the file exists and is writable but it is never created anywhere else so is_writable() will always be false and hence, there will never be an error log file.
The error log file (error.txt by default) is never created within c3.php. Currently,
is_writable()checks if the file exists and is writable but it is never created anywhere else sois_writable()will always befalseand hence, there will never be an error log file.