What is PHP.ini, the basic configuration file that controls the behavior of PHP applications? This blog post explains in detail what the PHP.ini file is, its basic functions, and its limitations. It examines how to modify PHP.ini settings, the most important settings and their descriptions, their performance impact, and security precautions. It also addresses common errors and solutions, addresses customization methods on different servers, and provides helpful resources and tips. This guide will help you optimize the performance and security of your PHP applications by customizing the PHP.ini file.

What is PHP.ini and Its Basic Functions

What is PHP.ini? It's a core configuration file for PHP (Hypertext Preprocessor). It contains a set of settings that control and customize PHP's behavior. It's a critical file that determines how server-side PHP scripts are handled, which extensions are enabled, and resource usage. This file ensures consistent and optimized operation of PHP across different environments (web servers, command-line interfaces, etc.).

PHP.ini file, PHP's runtime behavior It contains various settings that affect the application's performance. For example, parameters such as maximum script execution time, memory limit, error reporting level, and file upload sizes can be configured through this file. These settings directly impact the performance and security of web applications. A properly structured PHP.ini file ensures faster application execution, better error management, and reduced security vulnerabilities.

Basic Functions of PHP.ini
• Set the error reporting level.
• Enable or disable extensions.
• Determining memory usage limits.
• Configure file upload sizes (upload limits).
• To configure session management settings.
• Limiting script execution time.

The table below shows some of the basic settings and their functions that are frequently used in the PHP.ini file:

Settings	Explanation	Sample Value
memory_limit	The maximum amount of memory a script can use.	128M
max_execution_time	The maximum time (seconds) a script can run.	30
display_errors	Whether error messages should be displayed on the screen.	Front or Off
upload_max_filesize	The maximum file size that can be uploaded.	2M

Customizing the PHP.ini file is an important part of ensuring an environment that meets the needs of your web application. However, it's important to understand the potential impact of changes made to this file and exercise caution. An incorrectly configured PHP.ini file can lead to improper application operation or security vulnerabilities. Therefore, it's a good practice to back up your current settings and test each change before making any changes.

Limitations of PHP.ini and Things to Consider

What is PHP.ini? When searching for the answer to this question, it's important to consider the flexibility and power this configuration file offers, as well as some limitations and cautions. PHP.ini is the central point for controlling PHP behavior across the server, but it's not a magic bullet.

For example, security Vulnerabilities or coding errors cannot be completely addressed directly through PHP.ini. While PHP.ini can mitigate some risks by disabling certain functions or limiting resource usage, it does not provide a comprehensive solution for vulnerabilities in the application itself. Therefore, safe coding practices and regular security audits should always be a priority.

Limitation	Explanation	Proposed Solution
Cannot Completely Close Security Vulnerabilities	While PHP.ini provides basic security measures, it cannot cover application-level vulnerabilities.	Adhere to secure coding standards and conduct regular security scans.
It Can't Solve Performance Problems Alone	A misconfigured PHP.ini may negatively impact performance, but it does not solve the underlying performance problems.	Implement code optimization, database query optimization, and caching strategies.
Does Not Provide Full Control in Every Hosting Environment	In shared hosting environments, you may have limited control over PHP.ini.	Consider more customizable hosting solutions such as VPS or dedicated servers.
Version Compatibility Issues	Different PHP versions may support different PHP.ini directives.	Configure the PHP.ini settings appropriate for the PHP version you are using.

Also, changes made to PHP.ini settings effect It may not be immediately apparent. Depending on the server configuration, a server restart or PHP-FPM reload may be required for the changes to take effect. This is especially important to be aware of in a live environment. Testing and gradually implementing changes in a test environment will minimize potential issues.

Limitations to Consider

• Shared Hosting Restrictions: In shared hosting environments, you may have limited access to the PHP.ini file. In this case, you can change certain settings through the interfaces provided by your hosting provider.
• Version Compatibility: Different versions of PHP may support different PHP.ini directives. Make sure you configure the appropriate settings for your PHP version.
• Effects of Misconfiguration: A misconfigured PHP.ini file can cause your application to malfunction or lead to security vulnerabilities.
• Caching Mechanisms: You may need to flush any caching mechanisms (e.g. opcache) on your server for changes to PHP.ini to take effect.
• Security Risks: Not every PHP.ini setting is secure. Some settings can compromise the security of your application, so it's important to understand the potential impact of each setting.
• Performance Optimization: While PHP.ini is a powerful tool for performance optimization, it can negatively impact performance if used incorrectly.

It's important to remember that PHP.ini is just a tool, and when used correctly, it can be invaluable. However, being aware of its limitations and using it in conjunction with other security and performance optimization methods will help you develop a more robust and secure application. Considering PHP.ini holistically and continually reviewing it is critical for long-term success.

documentation and leveraging community resources is crucial for effectively configuring PHP.ini. The official PHP website and various online forums provide detailed information and examples about PHP.ini directives. These resources are valuable tools for troubleshooting issues you may encounter and learning best practices.

How to Change PHP.ini Settings?

What is PHP.ini? Once you know the answer to this question, knowing how to modify this file's settings is critical for optimizing your server and application performance. Changing settings in the PHP.ini file allows you to customize PHP's behavior, optimize resource usage, and enhance security. In this section, we'll examine in detail how to modify PHP.ini settings.

Before editing the PHP.ini file, it's important to make sure you're editing the correct file. If you have multiple PHP installations (for example, you use different PHP versions for different projects), each one may have its own PHP.ini file. To make sure the file you need to edit is the correct one, phpinfo() You can use the function. This function provides detailed information about your PHP configuration and shows which PHP.ini file is being used.

Setting Name	Default Value	Explanation
memory_limit	128M	The maximum amount of memory a script can use.
max_execution_time	30	The maximum time (seconds) a script can run.
upload_max_filesize	2M	The maximum file size that can be uploaded.
error_reporting	E_ALL & ~E_NOTICE & ~E_DEPRECATED	Error reporting level.

It's important to be careful when editing the PHP.ini file and test your changes. An incorrect setting could cause your application or server to malfunction. Therefore, it's recommended to back up your existing PHP.ini file before making any changes. This way, if you encounter any issues, you can easily revert to the original configuration.

Steps to Change PHP.ini Settings

1. Find the correct PHP.ini file (phpinfo() using the function).
2. Make a backup of the PHP.ini file.
3. Open the PHP.ini file using a text editor.
4. Find the settings you want to change and update their values.
5. Save the changes.
6. Restart your web server (for example, Apache or Nginx).
7. Test whether the changes are effective.

After changing the settings, remember to restart your web server. This will ensure the changes take effect. Restarting the server will reload the configuration files and apply the new settings. To check if the changes are effective, phpinfo() You can reuse the function or observe the behavior of your application.

Most Important PHP.ini Settings and Their Explanations

What is PHP.ini? When searching for the answer to this question, we realize the breadth of customization possibilities this file offers. The PHP.ini file contains a number of settings that profoundly affect how PHP operates. These settings are critical for optimizing your application's performance, improving security, and troubleshooting various errors. In this section, we'll take a detailed look at the most important PHP.ini settings and their meaning.

Settings in the PHP.ini file can be customized to suit the needs of your server and application. For example, parameters such as the amount of memory a web application requires, the maximum allowed upload size, or the execution time of scripts can all be easily configured through PHP. Properly configuring these settings will ensure your application runs more efficiently and securely.

Important PHP.ini Settings and Defaults

Settings	Default Value	Explanation
memory_limit	128M	The maximum amount of memory a script can use.
upload_max_filesize	2M	The maximum file size that can be uploaded.
max_execution_time	30	The maximum time (seconds) a script can run.
error_reporting	E_ALL & ~E_NOTICE & ~E_DEPRECATED	Determines which errors are reported.

Configuring the correct PHP.ini settings not only improves performance but also minimizes security vulnerabilities. For example, allowing excessive memory usage or enabling detailed error display can pose potential security risks. Therefore, it's important to understand what each setting means and its impact on your application. Let's take a closer look at some of these settings.

Important PHP.ini Settings
• memory_limit: Determines the maximum amount of memory a PHP script can use. This may need to be increased for applications with high memory consumption.
• upload_max_filesize: Sets the maximum file size allowed for file uploads. This can be increased to allow uploads of larger files.
• post_max_size: Determines the maximum amount of data that can be sent using the POST method. This setting should be adjusted to avoid problems with form submissions.
• max_execution_time: This specifies the maximum time in seconds that a PHP script can run. This can be increased for long-running operations.
• error_reporting: Controls which types of errors are reported. In a development environment, it is recommended to show all errors, and in a production environment, it is recommended to report only critical errors.

Below, you'll find some important PHP.ini settings and their descriptions. These settings can directly impact your web server's performance and security. Understanding what each setting does will help you configure the settings that best suit your application's needs.

Memory Limits

memory_limit The setting determines the maximum amount of memory a PHP script can use. Applications that work with particularly large data sets or perform complex operations may need to increase this setting. However, setting a value that is too high can unnecessarily consume your server's resources. Therefore, it's important to set a value based on your application's actual needs.

Timeout Settings

max_execution_time The setting specifies the maximum time, in seconds, that a PHP script can run. Long-running operations (for example, a large database query or file processing) may require increasing this setting. However, setting a timeout that's too long can negatively impact your server's response time. Therefore, it's important to optimize the execution time and carefully adjust this setting if necessary.

Properly configuring the settings in your PHP.ini file ensures the healthy and efficient operation of your web application. Therefore, it's important to regularly review these settings and update them according to your application's needs.

Impact of PHP.ini Settings and Performance Analysis

What is PHP.ini? When searching for the answer to this question, it's important to understand that this file isn't just a configuration tool; it's a critical factor that directly impacts your application's performance. The PHP.ini file contains a set of settings that control PHP's runtime behavior. These settings can vary widely, from memory usage and maximum execution time to file upload limits and error reporting levels. A properly structured PHP.ini file can make your web application run faster, more secure, and more efficiently.

To evaluate the performance impact of PHP.ini settings, it's necessary to run various tests and analyses. These analyses will help you identify which parts of your application are consuming the most resources and which settings need to be optimized. For example, memory_limit The setting determines the maximum amount of memory a PHP script can use. Setting this value too low can cause errors due to your application running out of memory, while setting it too high can lead to inefficient use of server resources.

Settings	Default Value	Optimized Value	Explanation
memory_limit	128M	256M	The maximum amount of memory that scripts can use.
max_execution_time	30 seconds	60 seconds	The maximum amount of time a script can run.
upload_max_filesize	2M	16M	The maximum file size that can be uploaded.
error_reporting	E_ALL & ~E_NOTICE & ~E_DEPRECATED	E_ALL & ~E_NOTICE & ~E_DEPRECATED	Error reporting level.

It's also important to remember that PHP.ini settings are closely related to security. For example, expose_php The setting controls whether PHP is visible in the server header. Disabling this setting can provide an additional layer of security against potential attackers by hiding which PHP version your server is using. You can also increase your system's overall security with these and similar settings.

Effects on Performance
• Memory Management: Correctly setting memory limits.
• Execution Time: Preventing timeouts for long-running operations.
• File Upload Sizes: Ensuring smooth uploading of large files.
• Caching: Improving performance with opcode caching.
• Error Reporting: Correct reporting and logging of errors.
• Security: Closing security vulnerabilities.

Before changing PHP.ini settings, it's important to back up your PHP.ini and test your changes in a test environment. A misconfigured PHP.ini file can cause your application to malfunction or introduce security vulnerabilities. Therefore, proceeding with caution and awareness will ensure the best results.

Traffic Analysis

Analyzing your website's traffic is crucial for optimizing your PHP.ini settings. A high-traffic website consumes more resources, which can negatively impact server performance. Using traffic analysis tools, you can determine which pages are visited most, which traffic peaks, and how long users spend on your website. This information helps you adjust your PHP.ini settings based on traffic intensity. For example, during peak hours max_execution_time You can increase the setting or increase the memory limits. This way, you can ensure your website runs smoothly even under high traffic.

Response Times

Response times are a key performance metric that directly impacts user experience. A website that responds slowly can cause users to abandon your site and decrease your search engine rankings. By optimizing PHP.ini settings, you can significantly reduce response times. For example, using opcode caching (e.g., OPcache) can make PHP scripts run faster. Optimizing database connections and reducing unnecessary operations also helps improve response times. Regularly monitoring and analyzing response times allows you to identify potential performance issues early and make necessary adjustments.

PHP.ini and Security Measures

What is PHP.ini? When searching for the answer to this question, it's important to remember that this file not only configures PHP settings but also plays a critical role in securing your web applications. The PHP.ini file provides various security measures that can be used to close security vulnerabilities, prevent unauthorized access, and prevent malicious code from running. Proper configuration of these measures can significantly increase the security of your website and server.

Security-focused adjustments to the PHP.ini file help strengthen your server's overall security profile. For example, disabling sensitive functions, limiting file uploads, and tightening session management settings reduce potential attack vectors. Each of these adjustments provides a defense mechanism against different types of security threats.

Recommended Settings for Security

• `disable_functions`: Disable risky functions (e.g.: `exec, shell_exec, system`).
• `open_basedir`: Limit the directories that PHP can access.
• `register_globals`: Make sure it is turned off (deprecated, but important to check).
• `session.cookie_httponly`: Make session cookies accessible only over HTTP.
• `session.cookie_secure`: Enable for secure sessions over HTTPS.
• `expose_php`: Hide PHP version information (set to off).

The table below lists some security-critical settings in the PHP.ini file and their descriptions. Correctly configuring these settings will help you increase the security of your web applications.

Settings	Explanation	Recommended Value
`disable_functions`	Disables risky PHP functions.	Risky functions such as `exec, shell_exec, system, passthru`
`open_basedir`	Limits the file system that PHP can access.	`/var/www/html` (or your website's root directory)
`expose_php`	Determines whether PHP will publish version information in the HTTP header.	`Off`
`session.cookie_httponly`	Blocks access to cookies via JavaScript.	`Ten`

It's important to remember that security is a continuous process. Regularly reviewing your PHP.ini settings is important to take precautions against current security threats and close security vulnerabilities. Firewalls, intrusion detection systems And regular security scans Along with other security measures such as .php, a properly configured PHP.ini file creates a strong foundation for securing your web applications.

Common PHP.ini Errors and How to Fix Them

What is PHP.ini? While searching for the answer to this question, there are some common errors that can be encountered when customizing this file. These errors can negatively impact the performance of your website or application, or even prevent it from working. Therefore, it's important to understand what these errors are and how to resolve them.

Use of incorrect syntax, PHP.ini This is one of the most common errors in a file. A missing semicolon (;) on a line or an incorrect directive name can prevent PHP from reading the configuration file. This often leads to generic errors like Internal Server Error. Another common mistake is accidentally leaving functions enabled that should be disabled for security reasons (for example, `eval()` or `system()`). This can leave your website vulnerable to potential security vulnerabilities.

Error Type	Possible Causes	Solutions
Syntax Error	Missing semicolon, wrong directive name	Open the PHP.ini file with a text editor and fix the erroneous lines.
Wrong Value Assignment	Incompatible or invalid values	Set a correct and valid value for the directive. Check the PHP documentation.
Security Vulnerabilities	Insecure functions are active	Disable dangerous functions using the `disable_functions` directive.
Performance Issues	Improper memory management, excessive resource consumption	Optimize settings such as `memory_limit`, `max_execution_time`.

Also, PHP.ini Another common problem is that changes made to a file don't take effect. This could be because the web server or PHP-FPM hasn't been restarted. The server must be restarted or PHP-FPM reloaded for the changes to take effect. Performance issues like exceeding the memory limit or setting the execution time too short are also common errors. These types of issues can cause your website to run slowly or encounter errors.

It is important to follow a systematic approach to troubleshooting these errors. PHP.ini Carefully reviewing the file to identify any broken lines, review security measures, and optimize performance settings will help resolve the issue. The following steps are a guide to resolving common errors.

Error Resolution Steps
1. PHP.ini take a backup of the file.
2. Carefully examine the error messages and identify the relevant instructions.
3. Correct syntax errors and check directive names.
4. Configure the `disable_functions` directive to disable security vulnerabilities.
5. Optimize performance settings (e.g. `memory_limit`, `max_execution_time`).
6. Restart the web server or PHP-FPM.
7. Test the changes to ensure that any bugs are fixed.

PHP.ini Documenting and regularly reviewing changes to the file will help prevent future problems. Remember, a properly configured PHP.ini file is critical to the security, performance, and stability of your website.

PHP.ini Customizations on Different Servers

What is PHP.ini? When searching for the answer to this question, it's also important to understand how this file can be customized on different server types. Access and editing permissions to the PHP.ini file may vary across different server environments, such as shared hosting, VPS (Virtual Private Server), or dedicated servers. These differences can directly impact your website's performance, security, and compatibility.

By server type PHP.ini Access to and editing permissions for the file vary. This is an important point for web developers and system administrators to consider. Each server type offers different levels of control and customization. Therefore, it is important to choose the appropriate server type. PHP.ini Configuring your application is critical for its smooth operation.

The table below shows the different server types PHP.ini It provides an overview of how customization can be done.

Server Type	Accessing PHP.ini	Customization Methods	Important Notes
Shared Hosting	Often limited or no access	.htaccess file or tools provided from the hosting panel	Some settings may not be changeable, be aware of the hosting provider's restrictions.
VPS (Virtual Private Server)	Full access	Editing the PHP.ini file directly	Root access is required, changes may affect all sites.
Dedicated Server	Full access	Editing the PHP.ini file directly	Since you have full control over the server, analyze the impact of the changes well.
Cloud Servers (AWS, Azure, Google Cloud)	Variable, usually full access	Edit PHP.ini via console or admin panel	Explore cloud platform-specific tools and configurations.

PHP.ini Another thing to consider when customizing is the impact of the changes made. Especially on high-traffic websites, a misconfigured PHP.ini file could lead to performance issues or security vulnerabilities. Therefore, it is important that every change is carefully tested and monitored.

PHP.ini Edits Based on Server Type

• On shared servers, you may be limited to the PHP settings available through your hosting panel.
• On VPS servers, usually PHP.ini You have direct access to the file, but you must be careful.
• With dedicated servers, you have full control over the server configuration, allowing for greater customization.
• .htaccess file for specific directories PHP.ini you can define the settings.
• You can change some settings at runtime with PHP's `ini_set()` function.
• For security reasons, some PHP.ini settings may be restricted by your hosting provider.

Shared Servers

On shared servers PHP.ini Direct access to the file is generally not possible. This is because multiple websites share the same server resources, and any incorrect changes made by one user can affect other users. However, hosting providers often provide some changes through their hosting panels or through the .htaccess file. PHP.ini These settings are usually limited to basic parameters such as memory limit, maximum execution time, etc.

VPS Servers

VPS servers offer more freedom and control than shared hosting. Generally PHP.ini You have full access to the file and can make any changes you want. However, with this freedom comes responsibility. If you have a misconfigured PHP.ini file can negatively impact your server's performance or lead to security vulnerabilities. Therefore, it's important to back up existing settings and carefully test each change before making any changes.

Remember, PHP.ini Changes to the file can directly impact the overall performance of your website and server. Therefore, it's always best to proceed with caution and awareness.

Useful Resources and Links About PHP.ini

What is PHP.ini? When searching for answers to these questions and customizing this file, accessing accurate and reliable resources is crucial. In this section, we've compiled helpful resources and links to learn more about PHP.ini, explore different configuration scenarios, and find solutions to common problems. These resources offer valuable information for both beginners and experienced developers.

Guides and documentation are available on various platforms to help you understand and resolve potential issues you might encounter when working with the PHP.ini file. These resources will help you understand the causes of errors and ensure correct configuration. Additionally, improve performance and you can also find tips on how to optimize certain settings to ensure security.

At work PHP.ini Here are some resources you can use to learn more about the file:

• PHP Official Documentation: PHP's official website provides comprehensive information about the PHP.ini file and its configuration options.
• Stack Overflow: It provides a large archive of questions and answers to help you resolve errors and problems you encounter with PHP.ini.
• PHP Q&A Forums: Forums run by the PHP community are a great place to get help from experienced developers.
• Server Management Panel Documents (cPanel, Plesk, etc.): The documentation for these panels can provide guidance on how to manage PHP settings.
• Knowledge Bases of Web Hosting Providers: Most web hosting providers offer dedicated articles and guides on PHP.ini configuration.

Also, in different server environments (e.g. Apache, Nginx) PHP.ini You might also find it helpful to review specific guides on how to configure the file. These guides can help you understand the requirements and best practices specific to each server type.

Conclusion and PHP.ini Customization Tips

What is PHP.ini? In this article, we've thoroughly explored the answer to this question and its critical role on the web server. PHP.ini is an indispensable tool for controlling PHP's behavior, optimizing performance, and configuring security measures. When configured correctly, you can make your web applications run faster, more securely, and more efficiently. However, incorrect configurations can lead to serious problems, so it's important to be vigilant and aware.

When customizing the PHP.ini file, it's important to understand the impact of each change on your application. Backing up your current configuration before making changes makes it easier to back out of any potential issues. Furthermore, testing changes in a test environment, rather than applying them directly to the live environment, will help you avoid unexpected issues.

Clue	Explanation	Importance
Take Backup	Make sure to backup your PHP.ini file before changing it.	High
Use a Test Environment	Test changes before applying them to the live environment.	High
Follow Updates	Keep track of changes to PHP versions and security updates.	Middle
Review the Documentation	Check out the official documentation on PHP.net.	High

Remember, PHP.ini Changes to the file may not take effect immediately. It may often be necessary to restart the web server or reinstall PHP-FPM. Therefore, be sure to restart your server or reinstall PHP-FPM after making changes. You can also check the configuration information using the phpinfo() function to verify that the changes were applied correctly.

PHP.ini Customization Tips
1. Prioritize Security Settings: Carefully configure security settings such as `disable_functions` and `open_basedir`.
2. Optimize Performance: Improve the performance of your PHP applications by optimizing `opcache` settings.
3. Edit Error Reporting: Configure `error_reporting` and `display_errors` settings differently for development and production environments.
4. Set Memory Limit: Adjust the `memory_limit` setting according to your application's needs.
5. Set the Time Frame: Set `date.timezone` to the correct time zone.
6. Check Upload Size: Adjust the `upload_max_filesize` and `post_max_size` settings according to your file upload requirements.

PHP.ini Regularly review and update your PHP.ini file. Changes and security vulnerabilities in PHP versions may require your configuration to be up-to-date. Therefore, by regularly reviewing your PHP.ini file, you can identify potential problems early and ensure the continued optimal performance of your web applications.

Frequently Asked Questions

What is the main purpose of the PHP.ini file and why is it important for my website?

The PHP.ini file is the main configuration file that controls how PHP works. It has a direct impact on your website's performance, security, and compatibility. For example, it allows you to adjust file upload sizes, timeouts, and error reporting levels.

What should I do to make the changes I make to the PHP.ini file take effect immediately?

After making changes to the PHP.ini file, you'll need to restart your web server (e.g., Apache or Nginx) or reinstall PHP-FPM. This will allow PHP to read and apply the new settings. You can also check that the settings were updated correctly using the `phpinfo()` function.

What PHP.ini settings can help me increase my website's security?

You can disable functions and classes that could potentially lead to security vulnerabilities with the `disable_functions` and `disable_classes` directives. You can also limit the directories PHP can access using the `open_basedir` setting, and ensure that outdated and insecure settings like `register_globals` and `magic_quotes_gpc` are disabled.

What settings in PHP.ini directly affect my website's performance?

Settings like `memory_limit`, `max_execution_time`, and `upload_max_filesize` have a significant impact on performance. `memory_limit` determines the maximum amount of memory PHP scripts can use, while `max_execution_time` limits the maximum time a script can run. `upload_max_filesize` controls the maximum file size that can be uploaded. It's important to optimize these settings based on your server's resources and the needs of your web application.

What should I pay attention to when editing the PHP.ini file, and what could be the consequences of making the wrong change?

You should be very careful when editing the PHP.ini file. An incorrect change could cause your website to malfunction or cause unexpected errors. Always back up the file before making any changes. Also, make sure you fully understand the implications of any changes you make and how they will affect your website.

I'm using shared hosting, how can I customize PHP.ini settings?

In a shared hosting environment, you may not have direct access to the PHP.ini file. In this case, you can change some settings through the control panel provided by your hosting provider or through the .htaccess file. Alternatively, you can try changing certain settings within the script using the `ini_set()` function, but this may not always be possible.

What are the common errors in PHP.ini and how can I fix them?

Common errors include syntax errors, incorrect value assignments, and missing directives. To resolve errors, first read the error messages carefully. The error message usually indicates which line and directive is causing the problem. Use the official PHP documentation and online forums to learn more about the problematic directive. Try reverting your changes one by one to identify the source of the problem.

Can I use different PHP.ini files for different PHP versions? How do I do this?

Yes, if you have multiple PHP versions installed on your server, you can use separate PHP.ini files for each version. This is typically done using PHP-FPM. You can specify a different PHP.ini file for each PHP-FPM pool. This allows your different websites to use different PHP versions and settings. Make sure to match the correct PHP-FPM pool to your website in your server configuration.

More information: For more information about PHP.ini, see PHP's official documentation.