PHP-FPM Configuration for Apache on Red Hat: No Input File Specified

When installing PHP 8 on a Red Hat server with Apache, you may encounter the "No Input File Specified" error. This error occurs when Apache is unable to find the PHP files it needs to serve. In this article, we will cover the key concepts of configuring PHP-FPM with Apache on Red Hat, and provide a detailed guide to resolving the "No Input File Specified" error.

Introduction

PHP-FPM (FastCGI Process Manager) is a popular way to run PHP on Apache. It allows for better performance and resource management compared to traditional CGI and mod_php. In this article, we will cover the steps necessary to configure PHP-FPM with Apache on a Red Hat server.

Prerequisites

Before we begin, it is assumed that you have a Red Hat server with Apache installed and configured. Additionally, you will need to have PHP 8 installed on your server.

Configuring PHP-FPM

The first step in configuring PHP-FPM is to create a new pool. A pool is a group of PHP-FPM processes that serve requests for a specific virtual host. To create a new pool, you will need to edit the /etc/php-fpm.d/www.conf file.

First, make a backup of the default configuration file:

sudo cp /etc/php-fpm.d/www.conf /etc/php-fpm.d/www.conf.bak

Next, open the www.conf file in your favorite text editor:

sudo nano /etc/php-fpm.d/www.conf

Find the [www] section of the file and change the listen directive to a unique socket file:

listen = /run/php-fpm/php-fpm.sock

This will ensure that the PHP-FPM processes for this pool listen on a unique socket file.

Next, find the user and group directives and change them to a dedicated user and group for the pool:

user = php-fpm
group = php-fpm

This will ensure that the PHP-FPM processes run as a dedicated user and group.

Finally, add the following directives to the [www] section of the file:

pm = dynamic
pm.max_children = 5
pm.start_servers = 2
pm.min_spare_servers = 1
pm.max_spare_servers = 3

These directives will configure the PHP-FPM process manager to start with two processes and allow up to five processes to run simultaneously.

Once you have made these changes, save and close the file.

Configuring Apache

Now that we have configured PHP-FPM, we need to configure Apache to use it. To do this, we will use the ProxyPassMatch directive in our virtual host configuration.

First, open the virtual host configuration file for the site you want to configure:

sudo nano /etc/httpd/conf.d/your-site.conf

Next, add the following directives to the virtual host configuration:

<FilesMatch \.php$>
    SetHandler "proxy:fcgi://localhost:9000"
</FilesMatch>

These directives will tell Apache to proxy all requests for PHP files to the PHP-FPM socket file we configured earlier.

Once you have made these changes, save and close the file.

Testing the Configuration

Now that we have configured PHP-FPM and Apache, we can test the configuration to ensure that it is working correctly.

First, start the PHP-FPM service:

sudo systemctl start php-fpm

Next, restart the Apache service:

sudo systemctl restart httpd

Finally, navigate to your site in a web browser and test that PHP is working correctly.

Conclusion

In this article, we have covered the key concepts of configuring PHP-FPM with Apache on a Red Hat server. We have provided a detailed guide to resolving the "No Input File Specified" error, and have covered the steps necessary to configure PHP-FPM and Apache to work together.

References

• PHP-FPM documentation: https://www.php.net/manual/en/install.fpm.configuration.php
• Apache documentation: https://httpd.apache.org/docs/current/mod/mod_proxy_fcgi.html

Summary

• PHP-FPM is a popular way to run PHP on Apache
• Configuring PHP-FPM involves creating a new pool and configuring the process manager
• Configuring Apache involves adding the ProxyPassMatch directive to the virtual host configuration
• Testing the configuration involves starting the PHP-FPM and Apache services and navigating to the site in a web browser