The PHP development team has officially released PHP 7.4, marking the final major release in the PHP 7 series. Building on the success of PHP 7.3, the new version introduces several language improvements designed to help developers write cleaner, faster and more maintainable code.
PHP powers millions of websites around the world, including popular content management systems such as WordPress, Drupal and Joomla. Each new release brings improvements that help developers create better web applications while maintaining the performance gains introduced throughout the PHP 7 family.
What Is PHP
PHP is one of the world's most widely used server-side scripting languages.
It is responsible for powering dynamic websites, online shops, customer portals, booking systems and countless business applications. Because it is open source and supported by a large global community, PHP has become the foundation for a significant portion of the modern web.
Every major PHP release aims to improve developer productivity while maintaining excellent performance.
What' s New in PHP 7.4
PHP 7.4 introduces several highly anticipated features that simplify development and reduce the amount of code developers need to write.
Some of the most significant additions include:
- Typed Properties
- Arrow Functions
- Null Coalescing Assignment Operator
- Numeric Literal Separators
- Spread Operator within Arrays
- Weak References
- Custom Object Serialisation
These new features are designed to make PHP applications easier to maintain while improving readability.
Typed Properties
One of the headline features in PHP 7.4 is the introduction of Typed Properties.
Developers can now specify the expected data type for class properties without needing additional getter or setter methods.
For example, properties can now be declared as:
- string
- int
- bool
- float
- array
- object
This helps catch programming errors earlier while making applications easier to understand.
Arrow Functions Simplify Code
Anonymous functions have long been a useful feature within PHP.
PHP 7.4 introduces Arrow Functions, allowing developers to write short callback functions using much less code.
This makes array handling and functional programming considerably cleaner.
Numeric Literal Separators
Developers working with large numbers can now improve readability by using underscores within numeric values. For example: 1_000_000 instead of 1000000.
Although this does not change how PHP processes the value, it makes large numbers much easier to read.
Null Coalescing Assignment Operator
Another welcome addition is the Null Coalescing Assignment Operator (??=).
This allows developers to assign default values only when a variable has not already been set.
The result is shorter, cleaner code that reduces repetitive conditional statements.
Spread Operator for Arrays
PHP 7.4 extends the Spread Operator, making it possible to unpack arrays directly into other arrays.
This simplifies array merging and improves readability in many applications.
Improved Performance
While PHP 7.4 focuses heavily on language improvements rather than dramatic speed increases, developers should still expect strong performance.
PHP 7 has already delivered substantial performance gains compared with PHP 5, and version 7.4 continues to build upon those improvements.
Lower memory usage and efficient execution remain important priorities for the PHP development team.
Better Support for Modern Development
PHP continues evolving to meet modern software development practices.
The additions in PHP 7.4 help developers write code that is:
- Easier to maintain
- More predictable
- Better organised
- Less repetitive
- Simpler to debug
These improvements benefit both developers and businesses by making long-term maintenance more straightforward.
Compatibility Considerations
As with any major PHP release, developers should test existing applications before upgrading.
Some older software, plugins and bespoke applications may require updates to ensure full compatibility with PHP 7.4.
Testing upgrades within a development or staging environment is always recommended before deploying to production servers.
What This Means for WordPress Users
WordPress users are expected to benefit from PHP 7.4 once plugin and theme developers begin adopting the new features.
Although many websites will initially continue running earlier PHP versions, developers are encouraged to begin testing compatibility to prepare for future upgrades.
Keeping websites on supported PHP versions helps improve security, stability and long-term reliability.
Looking Ahead
PHP continues to develop at an impressive pace.
The release of PHP 7.4 demonstrates the language's ongoing commitment to modern programming practices while maintaining the speed and flexibility that have made it one of the most widely used technologies on the web.
For developers building new websites and applications, PHP 7.4 offers an excellent foundation with cleaner syntax, improved developer tools and enhanced maintainability.
As software providers begin adopting the latest version, PHP 7.4 is expected to become the recommended choice for many new web projects.
