PHP is a programming language used to run dynamic websites and applications.
Different PHP versions exist, each with its own features, performance and security characteristics.

Choosing the correct PHP version is important for website stability.

Why PHP Versions Matter #

PHP versions affect:

• Website compatibility
• Performance
• Security
• Plugin and theme behavior

Using an unsupported or outdated version can cause errors or security risks.

Common PHP Version Types #

PHP versions are released in major and minor versions.

Each version:

• Receives updates for a limited time
• Eventually reaches end of life
• Stops receiving security fixes after end of life

Using supported versions is strongly recommended.

PHP Versions at ProRedLine #

ProRedLine provides:

• Multiple supported PHP versions
• Secure, maintained builds
• Compatibility with common CMS platforms

End-of-life PHP versions are not available.

Choosing the Right PHP Version #

You should choose a PHP version based on:

• Website or CMS requirements
• Plugin and theme compatibility
• Official software documentation

Most modern websites perform best on newer PHP versions.

How to Change PHP Versions #

PHP versions can be selected via:

• MultiPHP Manager in cPanel

Changes apply per domain or directory.

Testing After Changing PHP Versions #

After switching PHP versions:

• Test website functionality
• Check error messages
• Review logs if issues occur

Revert the change if compatibility issues appear.

Common PHP Version Issues #

Issues may occur if:

• Plugins are outdated
• Themes are incompatible
• Deprecated functions are used

These issues must be resolved at the application level.

Security Considerations #

Using outdated PHP versions:

• Increases vulnerability risk
• Is not supported
• May violate security best practices

Always use supported versions.

When Not to Change PHP Versions #

Do not change PHP versions if:

• The website is working correctly
• You are unsure about compatibility
• The CMS documentation specifies a fixed version

Unnecessary changes can break websites.

Responsibility Notice #

You are responsible for:

• Selecting compatible PHP versions
• Testing after changes
• Maintaining application compatibility

ProRedLine does not debug PHP application errors.