php can't connect to mysql with error 13 (but command line can)

Question

I have weird situation in newly installed server, and it seems that Google can\'t help me this time. I can\'t connect to (remote) mysql from my php-code. When I try to conn

Answer 1

On CentOs 6, you can use the following (without -P)

setsebool httpd_can_network_connect=1

Answer 2

setsebool -P httpd_can_network_connect=1

will also be a helpful CLI command to many people visiting this question, as to allow mysql_connet() connections from within HTTP (Apache) requests to a remote MySQL database server, ensure to enable Network Connections from httpd in SElinux usually located in /etc/selinux/config (disabled by default to prevent hackers from attacking other machines using your httpd).

Answer 3

On Fedora 21 with apache 2/httpd version 2.6 using php version 5.6 when connecting to a remote mysql server 5.6 or mariadb version 10. It even seems to be a problem connecting to local server when specifying the server's FQDN instead of localhost in the php code.

This command will fix the permissions problem for the current session:

setsebool httpd_can_network_connect_db on

To make the fix permanent for subsequent reboots you need to do this:

setsebool -P httpd_can_network_connect_db on

Thanks to all on this question for rescuing me from "permission denied" hell. :)