SElinux
Set label on folder
semanage fcontext -a -t samba_share_t <complete-path-to-folder>
Se label also on subfolder and files
semanage fcontext -a -t samba_share_t "<complete-path-to-folder>(/.*)?"
Quotes are required!
Restore label
Also used to apply labels to sub directories.
restorecon -Rv <complete-path-to-folder>
Allow PHP connection to external DB server
setsebool -P httpd_can_network_connect 1
setsebool -P httpd_can_network_connect_db 1