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Setting environment variable in Apache + PHP-FPM

Hey everyone,

I've been trying to set an environment variable in my Apache + PHP-FPM setup, but I'm a bit overwhelmed with the documentation and confused about the correct approach. I hope someone here can help me out.

To give you some context, I'm working on a web application that requires certain configuration variables to be set globally across the application. I figured using environment variables would be a good fit for this, as it allows me to easily configure different values for development, staging, and production environments.

I'm using Apache as my web server and PHP-FPM as the FastCGI process manager for PHP. I've already installed and configured them properly. Now, I'm looking for guidance on how to set up environment variables specifically for this setup.

I've read through the Apache documentation and different online resources, but I'm still unsure about the best approach. Some sources suggest using the `SetEnv` directive in the Apache Virtual Host configuration, while others recommend editing the PHP-FPM pool configuration.

Which one is the right way to go? Should I use both? And how exactly do I set the environment variables using these methods? It would be great if someone could provide me with a step-by-step guide or point me to a resource that explains it clearly.

Thanks in advance for your help!

All Replies

nasir10

Hey there!

I can understand your confusion, as getting the correct setup for environment variables in Apache + PHP-FPM can be a bit tricky. I've recently gone through a similar setup, and I can share my experience with you.

In my case, I found that setting the environment variables in both the Apache Virtual Host configuration and the PHP-FPM pool configuration was necessary for them to work effectively. Let me walk you through the steps I followed:

1. Apache Virtual Host Configuration:
- Open the Virtual Host configuration file for your website (typically located in the `sites-available` directory).
- Inside the `<VirtualHost>` block, add the `SetEnv` directive for each environment variable you want to set. For example:


SetEnv MY_VAR my_value
SetEnv ANOTHER_VAR another_value

- Save the file and exit.
- Restart Apache for the changes to take effect.

2. PHP-FPM Pool Configuration:
- Open your PHP-FPM pool configuration file (often located in the `/etc/php/{version}/fpm/pool.d/` directory).
- Depending on your PHP-FPM version, you may need to edit either the `www.conf` or `www.conf.php` file.
- Look for the `[www]` or `[www.php]` section and add the `env` directive for each environment variable, specifying its name and value. For example:

env[MY_VAR] = my_value
env[ANOTHER_VAR] = another_value

- Save the file and exit.
- Restart the PHP-FPM service for the changes to take effect.

By setting the environment variables in both places, you ensure that they are available in both Apache and PHP-FPM processes, allowing your application to access them correctly.

I hope this helps! Let me know if you have any further questions or need more clarification.

krystel14

Hey everyone,

I wanted to share my experience with setting environment variables in Apache + PHP-FPM.

Unlike the previous responses, I found that utilizing the `SetEnvIf` directive in the Apache Virtual Host configuration worked like a charm for me. This directive provided me with more flexibility in setting environment variables based on specific conditions.

Here's what I did:

1. Open the Virtual Host configuration file for your website.
2. Inside the `<VirtualHost>` block, add `SetEnvIf` directives for each environment variable. For instance:


SetEnvIf Request_URI "^/admin" ENV_VAR=admin_value
SetEnvIf Remote_Addr "^192\.168\." ENV_VAR=local_value

In the above example, the `ENV_VAR` variable is set to different values based on the requested URI or the client's IP address.
3. Save the file and restart Apache for the changes to take effect.

By using `SetEnvIf`, I was able to easily set environment variables based on various conditions, such as the requested URI, client IP, request method, and more. This allowed me to handle different scenarios effectively.

Regarding PHP-FPM, in my case, I didn't need to make any adjustments to the pool configuration specifically for environment variables. The variables set using `SetEnvIf` in Apache were automatically available to PHP-FPM processes.

I hope this helps you explore an alternative approach to setting environment variables in your Apache + PHP-FPM setup. If you have any further questions or need more details, feel free to ask!

sanford.edgar

Hey!

I totally agree with user 1's response. Setting environment variables in both the Apache Virtual Host configuration and the PHP-FPM pool configuration is indeed the way to go.

In my experience, I encountered some issues initially because I only set the environment variables in the Apache configuration. It turned out that PHP-FPM was not able to pick up those variables, causing inconsistencies in my application.

To resolve this, I followed a similar approach to user 1. Firstly, I added the `SetEnv` directive in the Apache Virtual Host file, just as described earlier. This helps make the variables available to Apache.

However, I also had to make adjustments in the PHP-FPM pool configuration to ensure compatibility. Instead of using the `env` directive, I utilized the `php_admin_value` directive within the `[www]` section of the `www.conf` file. Here's an example:


php_admin_value[MY_VAR] = my_value
php_admin_value[ANOTHER_VAR] = another_value


Remember to restart both Apache and PHP-FPM after making these changes to ensure they take effect.

By setting the environment variables in both places, you not only make them accessible to Apache but also ensure they are inherited by the PHP-FPM processes, allowing your PHP scripts to access them correctly throughout the application.

I hope this provides another perspective and helps you successfully set up your environment variables. If you need further assistance or have any other questions, feel free to ask!

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