Installed Mariadb, Apache etc, and phpMyAdmin on the Fedora 22 Intel i7 system, and the database was all OK, but phpMyAdmin showed a blank window..

Searching for this issue produced a wealth of reasons – usually ‘operator/config’ problems..   My config was just a clone of a known/good system, and I eventually found a simple reason for the problem, that seemed to not match the error shown in the log..

/var/log/httpd/error_log showed:

.............................
[Sat Oct 24 12:47:53.542626 2015] [:error] [pid 640] [client 127.0.0.1:59992] PHP Fatal error: Call to undefined function __() in /usr/share/phpMyAdmin/libraries/core.lib.php on line 245
............................

But the (simple!) fix – after comparison with the known/good system setup – was to correct the ownership of /etc/phpMyAdmin/config.inc.php from root:root to root:apache

[root@rglinux-i7 phpMyAdmin]# chown root.apache config.inc.php

After that, all was OK..

Robert Gadsdon.   October 27, 2015.