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I tried to enable object cache for wordpress by using Memcache. And I put object-cache.php into /wp-content/, which I get from Memcached Object Cache plugin.

And then PHP Fatal error: Class 'Memcache' not found occurred. So I install memcache extension by executing sudo yum -y install php-pecl-memcache and sudo service httpd restart. But nothing changed.

I also tried to install php-pecl-memcached, not php-pecl-memcache. But nothing had changed.

I confirmed that /etc/php.d/memcache.ini file existed and extension=memcache.so is loaded in the file.

Please give me an advice to solve this.

When I tried that for new EC2 instance, it worked well. So I guess my environment is preventing in some ways. Any ideas?

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fire the command dpkg -l | grep php5 and check the packages installed. Check for php5-memcache and php5-memcached.

If not installed then install those

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I installed php5-memcache and php5-memcached. And then restart Apache. But it still did not work.
check this link stackoverflow.com/questions/1171313/…
$ php -m | grep memcache and I can get memcache memcached. memcache should be installed already. But wordpress output error log PHP Fatal error: Class 'Memcache' not found

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