When viewing logs, unexpected 'needle' errors can be seen on rare occasions #3659
Description
Describe the bug
07/06/2020 01:46:35 - ERROR PHP WARNING: strpos(): Empty needle in file: /usr/share/cacti/site/lib/clog_webapi.php on line: 76
07/06/2020 01:46:35 - CMDPHP PHP ERROR WARNING Backtrace: (/clog.php[40]:clog_view_logfile(), /lib/clog_webapi.php[247]:filter(), /lib/clog_webapi.php[483]:clog_get_logfiles(), /lib/clog_webapi.php[416]:clog_validate_filename(), /lib/clog_webapi.php[76]:strpos(), CactiErrorHandler())
The above is seen because basename($logfile) is performed before an empty logfile is initialized to a default value.
Expected behavior
No error and logbase set after filename fully initialized