PHP 7.4 EOL: Secure Your Legacy Code Without Upgrading

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Key Takeaways

After PHP 7.4 EOL, it is difficult to maintain PHP 7.4 applications securely due to the increased risk of security breaches.
Upgrading to supported PHP versions is recommended for better security, performance improvements, and long-term support. However, migration may require significant code changes.
If upgrading isn’t feasible, consider Endless Lifecycle Support (ELS) from TuxCare to receive security patches while continuing to run PHP 7.4.

A new PHP branch releases every year, and active support for each branch eventually ends just like it did for PHP 7.4. Once a PHP version reaches EOL (end of life), any security vulnerabilities or bugs found will not be fixed, leaving your PHP applications exposed.

PHP 7.4 reached EOL on November 28, 2022. In this article, we’ll explore the hurdles of maintaining PHP 7.4 post-EOL and offer strategies for risk mitigation and potential upgrade paths.

What Does PHP 7.4 End of Life Mean?

https://youtu.be/HFpjye110N0

PHP 7.4 EOL means the PHP 7.4 branch has ceased to be supported. That means this PHP version will not receive new bug fixes and security updates.

As a result, the applications built on this PHP code may no longer be compliant with security and data protection regulations. Therefore, it is crucial to manage and mitigate such kinds of risks and migrate PHP 7.4 applications to newer, supported versions.

With PHP 7 end of life, every PHP user is recommended to upgrade to the latest release of PHP, although it is not mandatory.

However, after the software reaches the end of life, it becomes difficult to maintain the system securely, as the risk of security breaches increases. The potential legal actions, penalties, and reputational harm caused by data breaches would far outweigh the cost of migration and upgrades.

W3Tech Usage Stats: PHP powers most websites, and a large portion still runs version 7.4, meaning many sites could face post-EOL security issues unless extended support is used.

Risks Associated with Maintaining PHP 7.4 EOL

Running PHP 7.4 after its end of life (EOL) exposes your applications to security threats, compatibility issues, performance slowdowns, and compliance risks.

Risks	Details
Security Vulnerabilities	Without PHP updates and patches, PHP 7.4 applications are highly vulnerable to emerging security vulnerabilities. Attackers are quick to exploit issues in unsupported software where vulnerabilities remain unaddressed.
Compatibility Issues	Over time, libraries, frameworks, and third-party services may drop support for PHP 7.4. This can lead to compatibility issues and hinder the functionality of the application.
Performance Limitations	With no further updates, PHP 7.4 EOL lacks the performance improvements and optimizations introduced in later versions. The applications running PHP 7.4 may suffer from suboptimal performance, which can impact user experience.
Compliance Concerns	Running unsupported software puts businesses with regulatory requirements at risk for non-compliance. Failing to comply with industry standards can result in penalties and legal repercussions.

Risk Mitigation Strategies

To mitigate the risks associated with maintaining PHP 7.4 applications after end of life, consider the following options:

Extended Support

Upgrading to newer PHP versions may result in downtime, as there have been lots of deprecations and breaking changes.

Therefore, it will require thorough testing and extra costs as well as additional time, depending on how much your application uses deprecated features.

If upgrading is not feasible at the moment for your production systems, you can consider using extended support for PHP 7.4. TuxCare’s Endless Lifecycle Support for Runtimes provides essential security updates and patches for end-of-life PHP versions beyond the official EOL date.

This helps ensure your PHP 7.4 EOL applications remain secure and compliant with regulatory requirements while you focus on planning your migration carefully.

Potential Upgrade Paths

The most secure option is to upgrade directly to the latest stable version of PHP (currently PHP 8.4 as of September 2025). PHP 8.4 will be supported until 31 December, 2028. But, this may require major code changes to ensure compatibility so your applications can function seamlessly.

The currently supported versions of PHP are:

PHP 8.2
PHP 8.3
PHP 8.4

Pro Tip: Before upgrading, test your PHP 7.4 applications in a staging environment to identify deprecated functions and ensure compatibility.

Should You Upgrade? Pros & Cons of PHP 8.x

There are likely few good reasons to delay upgrading, especially with PHP 8.2 end of life already on the calendar for December 31, 2026. Newer PHP versions improve performance limitations, security issues, and compatibility problems. It’s only a matter of time before your PHP 7.4 applications get compromised due to a lack of patches.

However, it is essential to remember that PHP 8 introduced major changes that break backward compatibility with PHP 7.4. This means the code that worked correctly in 7.4 might produce errors or fail to function in PHP 8.

Developers need to review and modify their code for compatibility. Additionally, PHP 8 deprecated certain features that were present in 7.4. If your application depends on them, you’ll need to rewrite those sections of code.

Pros:

Better Performance: PHP 8 supports Just-In-Time Compilation (JIT), which significantly improves performance.
Security Enhancements: Improved type safety, improved error handling, and nullsafe operator (?->).
New Features: Attributes, named arguments, match expressions, and additional features.
Modern Standard Library: Improved functions and classes, streamline development, and reduce boilerplate code.
Better Maintenance & Support: Active community, regular updates, and long-term support for security patches.

Cons:

Compatibility Problems: Older code may need refactoring, which can be costly and time consuming.
Library/Framework Issues: Some third-party dependencies may not be fully compatible, requiring updates or replacements.
Learning Curve: New syntax and features may require a developer adaptation.
Testing Overhead: Comprehensive regression testing is needed to ensure existing functionality is not broken.
Migration Costs: Refactoring, testing, and deployment can be time-consuming and resource-intensive.

How to Keep PHP 7.4 Secure If Not Upgrading

Upgrading from PHP 7.4 can be a massive undertaking as it may include significant code rewrites. Alternatively, you can opt for TuxCare’s Endless Lifecycle Support (ELS) for long-term support.

ELS allows you to maintain your current PHP version securely, receiving critical security patches for as long as needed after the official end-of-life date. This ensures your applications remain protected and operational, freeing you from the pressure of immediate, large-scale upgrades and allowing you to focus on strategic business growth.

TuxCare’s ELS enables you to:

Receive security fixes for outdated versions of PHP in enterprise Linux distributions, including AlmaLinux, Rocky Linux, CentOS and Ubuntu.
Continue running existing applications without immediate migration.
Achieve compliance requirements without upgrading.

You can discover additional details on how PHP extended support protects legacy environments in our complete overview.

Critical PHP Vulnerabilities Addressed in TuxCare’s ELS for PHP

TuxCare has addressed several critical vulnerabilities in PHP 7.4 across multiple Linux distributions. Using TuxCare’s CVE tracker, you can monitor each CVE, its severity, affected distributions, and patch status.

CVE-2025-1736

This flaw occurs when PHP fails to properly validate end-of-line characters in user-supplied headers. It can result in certain headers not being sent or misinterpreted, potentially disrupting application behavior or opening the door for header injection attacks.

CVSS 3.x Severity Score: 7.3 High

CVE-2025-1861

PHP’s HTTP redirect handling has a limited buffer for the location value, which can truncate URLs incorrectly. Attackers could exploit this to redirect users to unintended locations, potentially leading to phishing or data exposure.

CVSS 3.x Severity Score: 9.8 Critical

CVE-2024-11236

CVSS 3.x Severity Score: 9.8 Critical

On 32-bit systems, long string inputs to the ldap_escape() function can trigger an integer overflow, causing out-of-bounds writes. This may result in application crashes, unpredictable behavior, or security weaknesses exploitable by attackers.

Secure Your Applications with TuxCare After PHP 7.4 EOL!

Maintaining PHP application security after the end of life without getting some kind of extended support is a gamble. Although it might work for a while, the security risks and limitations it presents pose a significant threat. Businesses can navigate these challenges effectively with extended support and planning for strategic upgrades.

With TuxCare, you can get ongoing security patches for outdated PHP versions, allowing you to run PHP 7.4 applications safely while planning a smoother transition.

Want to know how much it will cost to secure your workloads running on outdated PHP versions? Get a quote today!

Frequently Asked Questions

Is PHP 7.4 Still Supported in 2026?

No, official active support for PHP 7.4 ended on November 28, 2022. Therefore, continuing to use PHP 7.4 in 2026 exposes your system to vulnerabilities and compliance risks.

How Many Websites Are Still Using the PHP 7.4 EOL Version?

Many websites still run PHP 7.4 due to legacy applications and compatibility concerns. However, running an unsupported version poses significant security risks.

Should I Upgrade from PHP 7.4 to PHP 8.x?

Yes, upgrading ensures better security, performance, and compatibility with modern frameworks. If immediate upgrading isn’t possible, consider TuxCare’s Endless Lifecycle Support for Runtimes, which includes long-term patching for EOL PHP versions.