Have done the below mentioned setting for increasing custom variables in piwik--- const MAX_CUSTOM_VARIABLES = 15; in tracker.php in piwik
why I did this is because we don't have console functionality because as per the mentioned on piwik's site the actual way should be --- const MAX_CUSTOM_VARIABLES = 15; in tracker.php in piwik
but when I performed the above step it gave me error ./console: No such file or directory
moreover now the problem lies that even editing tracker.php is not working out for me.