I ran into an issue in the last couple of days on NameCheap.com Shared Hosting while using the WordPress Plugin named backwpup.
I noticed that the last few days backups have given the following warning:
shell_exec() has been disabled for security reasons
After sending a ticket to tech support I was told that I needed to add a php.ini file to my webspace. In this file I would need to add the following:
I added the php.ini to the webroot of my site, in this case the /public_html/ folder of my account.
Upon checking in my WordPress admin, I was still seeing the same issue, so I responded to the support ticket and was informed that I would need to add a comment to my .htaccess file, as follows:
This again did not work, so I added the full path:
Doing this has fixed the shell_exec() errors I was seeing in the site. I hope this helps if you are seeing the same issues.
This code is also available on Pastebin.com, pastebin.com/cS71HSdy