<Install Dir of PHP>/bin/php -i | grep apxs

APACHE_HOME/bin/apxs

#php -i | grep apxs

 Failed loading opcache.so:  opcache.so: cannot open shared object file: No    such file or directory PHP Warning:  PHP Startup: Unable to load dynamic library     '<PHP_HOME>/lib/php/extensions/debug-non-zts-20121212/memcached.so' - <PHP_HOME>/lib/php/extensions/debug-non-zts-20121212/memcached.so: undefined symbol: OnUpdateLongGEZero in Unknown on line 0