For those whom are having similar issues, please do the following in php.ini:
error_reporting = E_ALL | E_STRICT
error_log = /var/log/php_errors.log
If needed, update the file permission
touch /var/log/php_errors.log
chown ${USER}: /var/log/php_errors.log
chmod +rw /var/log/php_errors.log
Look out for any errors.
In my case, there was a typo on one of the extensions' name.