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#PHP FPM APC INSTALL#
~]# yum install php-pear php-devel httpd-devel pcre-devel gcc make -y
#PHP FPM APC HOW TO#
Want to flush the Opcache instead of APC? Check out this article: How to clear PHP’s Opcache.Installation of Dependency Packages for APCįirstly install required packages namely pecl, phpize and apxs commands, in order to install APC using YUM package manager tool. In fact, you’re better of disabling APC altogether, as it produces overhead that never gives you the benefits. There’s no need to clear the APC cache, as it gets invalidated on every new request – each request starts a new process. Not to be confused with running PHP as the PHP-FPM daemon, in the older days PHP was run as a FastCGI script. That probably means sending a kill signal to the PHP process and starting it anew. If you start your PHP daemon via the built-in server, as php -S 127.0.0.1:80, you need to restart your daemon.
If this is how you’re running your PHP stack, you may consider using multiple PHP-FPM masters as outlined in “A better way to run PHP-FPM”, as it gives you an APC cache per PHP-FPM pool you are running. If your PHP server is running as a daemon via PHP-FPM, you can reload PHP-FPM. This can be used with Nginx, Lighttpd or even Apache. A restart is not needed (but it will also work), a reload is sufficient. With Apache + mod_phpĪs PHP is run as an Apache module, it’s sufficient to reload the Apache service. This depends on the way you run your PHP application. To clear the system cache, the one that holds the byte-code of the PHP files (the so called “opcode” cache), just call apc_cache_clear() without options. To clear the user cache (key/value), you can use apc_cache_clear('user'). You can call the apc_clear_cache() function to clear the cache. How do you clear the APC cache? There are basically two methods: as a PHP developer, you can use the built-in PHP functions – or as a SysAdmin, you can restart the necessary services to flush the APC cache.
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