Maybe I can help someone with the same problem;
if your phpMyAdmin version is 4.7.9 and if you are getting 500 error when you click operations tab or other tabs on the phpMyAdmin control panel please check /usr/local/cwpsrv/var/services/pma/libraries/StorageEngine.php find line 191 and
change
switch(strtolower($engine)) {
with
switch(mb_strtolower($engine)) {
I think publisher of phpMyAdmin forgot to change strtolower => mb_strtolower in this version at this line
The cause of the problem is if your server uses one of the latin5 languages by default, strtolower function is not lowering latin characters as expected and this situation is causes called undefined function error and returning 500 code;
from operations.lib.php at line 1193 $innodbEnginePlugin = StorageEngine::getEngine('Innodb'); is calling this function with Innodb parameter but strtolower is lowercasing Innodb to => ınnodb without dot and this causes called undefined function error
Topic: phpMyAdmin Error text: Internal Server Error (rejected) Reasons (Read 4054 times)
