PHP: APC Configuration and Usage Tips and Tricks

PHP APC (Alternative PHP Cache / Opcode Cache) is framework that optimizes PHP intermediate code and caches data and compiled code from the PHP bytecode compiler in shared memory. APC Opcode Cache is quickly becoming the de-facto standard PHP caching mechanism. (adsbygoogle = window.adsbygoogle || []).push({});PHP APC installation is very easy, example with Fedora / CentOS / Red Hat (RHEL) you can check following guides to see howto install it:
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Nginx and PHP-FPM Configuration and Optimizing Tips and Tricks

I wrote before a guide Howto install Nginx/PHP-FPM on Fedora 29/28, CentOS/RHEL 7.5/6.10, but this guide is just installation guide and many cases Nginx and PHP-FPM basic configuration is good enough, but if you want to squeeze all the juice out of your VPS or web server / servers and do your maintenance work little bit easier, then this guide might be useful. These tips are based entirely on my own experience, so they may not be an absolute truth, and in some situations, a completely different configuration may work better.
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Install Nginx/PHP-FPM on Fedora 29/28, CentOS/RHEL 7.5/6.10

This is guide howto install Nginx with PHP 7.2.12 and PHP-FPM on Fedora 29/28/27, CentOS 7.5/6.10 and Red Hat (RHEL) 7.5/6.10. PHP-FPM is easier to use and configure than FastCGI and some tests says that PHP-FPM is even much more efficient than FastCGI. Nginx (engine x) is a robust, small and high performance http server, reverse proxy server and also mail proxy server. PHP-FPM (FastCGI Process Manager) is an alternative PHP FastCGI implementation with some additional features useful for sites of any size, especially busier sites.
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Apache Userdir with SELinux on Fedora 31/30, CentOS/RHEL 8.0/7.7

This is quick guide howto enable Apache userdirs with SELinux on Fedora 31/30/29/28, CentOS 8.0/7.7/6.10 and Red Hat (RHEL) 8.0/7.7/6.10. This guide assumes that you have Apache (httpd) server installed on your system. This guide uses separeted userdir.conf without touching httpd.conf so later default httpd.conf can be overrided or whole configuration moved simply. This guide uses user called testuser and should be replaced by real user name(s). Enable Apache Userdirs 1.
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Install WordPress 4.1.1 on Fedora 21/20, CentOS/RHEL 7/6.6/5.11

This is guide, howto install WordPress 4.1.1 with Nginx or Apache on Fedora 21/20/19, CentOS 7/6.6/5.11 and Red Hat (RHEL) 7/6.6/5.11 servers. WordPress needs web server with PHP and MariaDB or MySQL database. This guide uses Apache web server with PHP 5.6 or Nginx web server with PHP 5.6 (PHP-FPM) and MariaDB 10/5.5 database server or Mysql 5.6 database server. If you want to install WordPress with Apache then use a – [Apache] sections and if you want install WordPress with Nginx then use b – [Nginx] sections.
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LAMP on Fedora 28/27, CentOS/Red Hat (RHEL) 7.5/6.10

LAMP (Linux, Apache, MariaDB/MySQL, PHP) server is very powerful server setup behind any website or web based service. This guide is collection of Fedora/CentOS/Red Hat (RHEL), Apache, MariaDB/MySQL and PHP install guides. Today the Internet is full of instructions, which promises a LAMP server installation with a “One-Liner”, and so forth. In fact, these “One-Liner” instructions assume that, Linux is already installed and installs just AMP (Apache, MariaDB/MySQL, PHP) pakages, without any configuration.
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Hide Apache ServerSignature / ServerTokens / PHP X-Powered-By

By default almost all Apache installation shows sensitive server information with Apache version number, server operating system details, installed Apache modules, PHP-version and so on. Attackers can use this information when performing attacks. Some examples howto check server information that Apache sends Error page Use lynx $ lynx -head -mime_header http://www.ubuntu.com HTTP/1.0 200 OK Date: Fri, 20 Nov 2009 09:25:46 GMT Server: Apache/2.2.8 (Ubuntu) mod_python/3.3.1 Python/2.5.2 PHP/5.2.4-2ubuntu5.7 with Suhosin-Patch mod_ssl/2.
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