===Set label on folder===
<code bash>
semanage fcontext -a -t samba_share_t <complete-path-to-folder>
</code>

===Set label also on subfolder and files===
<code bash>
semanage fcontext -a -t samba_share_t "<complete-path-to-folder>(/.*)?"
</code>
Quotes are required!

===Restore label===
Also used to apply labels to sub directories.
<code bash>
restorecon -Rv <complete-path-to-folder>
</code>

===Allow PHP connection to external DB server===
<code bash>
setsebool -P httpd_can_network_connect 1
setsebool -P httpd_can_network_connect_db 1
</code>