Make your app faster with PHP 8.3

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Make your app faster with PHP 8.3 image

PHP 8.3 is the latest version of PHP. It has exciting new features and major improvements in performance. By upgrading to 8.3, you can achieve a significant increase in speed. In this article, we dive into how PHP 8.3 can be a game changer. It can speed up your application's performance.

What’s new in PHP 8.3?

Direct Performance Enhancements

PHP 8.3 introduces optimizations that enhance the runtime efficiency of your applications. This performance boost is more than a small upgrade. It's a significant improvement in the PHP engine. This leads to faster execution and uses fewer resources.

Several key improvements achieve this boost.

The Just-In-Time (JIT) compiler has been further optimized for better efficiency. The execution of scripts is faster and consumes less CPU time. This is especially beneficial for resource-intensive tasks.

PHP has refined how it handles opcodes (the instructions in the PHP bytecode). Version 8.3 uses more efficient ways to interpret and execute these opcodes. This reduces the execution time of scripts.

PHP 8.3 enhances the garbage collection mechanism, which is responsible for freeing memory occupied by unused objects. This results in more efficient memory usage and can significantly improve performance for memory-intensive applications.

Other improvements include optimizations for handling arrays and an enhanced type system. Preloading upgrades let server admins load and compile PHP code into memory right when the server starts. This reduces the overhead of compiling scripts on each request. It leads to faster response times.

These upgrades mean your existing PHP code will run faster and use fewer resources on PHP 8.3. All this without making any changes to your code!

Indirect Performance Boosts

PHP 8.3 also improves syntax, methods, and type safety. These new features indirectly upgrade performance. They reduce production errors and increase developer efficiency. This allows you to ship updates faster and address performance issues more effectively.

Some key improvements include

  • Deep-cloning of read-only properties: PHP 8.3 enables the modification of read-only properties once with the __clone method. This allows for deep-cloning of these properties. But the original property remains immutable.
  • Randomness Improvements:The Random extension sees further improvements in PHP 8.3. Notably, the Randomizer class sees the addition of the getBytesFromString() method. This method generates random strings from a given set of characters. Additionally, the class now includes the getFloat() and nextFloat() methods. They generate random float values.
  • Dynamic Fetching of Class Constants and Enum Members. Dynamic Fetching simplifies fetching class constants and Enum members. It does this by using variable names. It makes the syntax more straightforward than in previous versions.
  • In PHP 8.3, unserialize() will always emit an E_WARNING when encountering issues. This improves unserialize() error handling. In previous versions, it would sometimes emit an E_NOTICE.
  • PHP 8.3 introduces several changes to the range() function. It includes new error and warning behaviors for certain types of inputs.
  • Version 8.3 added two new ini directives to detect stack overflows. They are zend.max_allowed_stack_size and zend.reserved_stack_size. This aims to make debugging easier by preventing stack-overflow-induced segmentation faults.

You can find the full list of new features in the release notes.

How to Make Your App Faster with PHP 8.3

Upgrade Your PHP Version to 8.3

The first step to harnessing the power of PHP 8.3 is to upgrade your current PHP environment to version 8.3. This upgrade is crucial for accessing the new features and performance improvements. By upgrading to 8.3, you can enjoy a performance increase of up to 42%, depending on your stack.

For guidance on how to upgrade, please see the official migration guide. Be mindful of any breaking changes that might be applicable to your app.

Use New Features to Build and Ship Faster

The new syntax and type safety features can significantly enhance the developer experience. This boosts performance as developers can rapidly identify and address performance issues. Here are some examples of leveraging the new features for a faster development cycle.

Example 1: Using Typed Class Constants

Typed class constants ensure that your code uses constants correctly throughout your application. This feature can prevent runtime errors. It's especially helpful in critical areas like caching. As a result, it makes your app more stable and faster.

class CacheSettings {
public const int MAX_LIFETIME = 3600; // Typed as integer
// ... other constants
// Usage
$cacheLifetime = CacheSettings::MAX_LIFETIME;

Example 2: Ensuring Correct Method Overrides with #[\Override]

class BaseClass {
public function compute() {
// Base implementation
class ChildClass extends BaseClass {
public function compute() {
// Correctly overridden method

In PHP 8.3, you apply the #[\Override] attribute to child class methods. It ensures that the compute() method in ChildClass overrides its parent in BaseClass. This prevents bugs and maintains performance integrity in complex class hierarchies.

Example 3: Improved Error Handling

try {
// Code that may throw an exception
} catch (FirstException | SecondException $e) {
// Handle multiple exceptions

PHP 8.3 can catch many exceptions in a single block. It streamlines error handling, saving time, and reducing code complexity.

Example 4: Extended Type Support

function addNumbers(int|float $a, int|float $b): int|float {
return $a + $b;

PHP 8.3 enhances its type system by introducing extended type support. Extended type support includes using union types in function signatures. The code above demonstrates this feature. It allows variables and return types to accept multiple types. Here, parameters and the return value can be either integers or floats. This offers greater flexibility and precision. This enhancement leads to clearer, self-documenting code, reducing type-related bugs. PHP 8.3 allows more precise and flexible function definitions. This improves code robustness and versatility. It also aids in the early detection of type-related errors. This contributes to application stability and efficiency.

Example 5: Simplifying JSON Validation

In PHP 8.3, the new json_validate() function simplifies validating JSON data. Before, developers had to rely on custom validation logic or external libraries. This was time-consuming and error-prone. Now you use json_validate() to check the format and structure of JSON strings. It's a single function call. This function streamlines JSON data handling. It is especially helpful in applications that use JSON a lot, like APIs. It reduces complexity and improves code reliability.

Previous PHP versions:

function json_validate(string $string): bool {
return json_last_error() === JSON_ERROR_NONE;
var_dump(json_validate('{ "test": { "foo": "bar" } }')); // true

PHP 8.3:

var_dump(json_validate('{ "test": { "foo": "bar" } }')); // true

General PHP Performance Enhancements

You can further boost performance of your apps by using the following strategies. These strategies optimize other layers of your application stack. They ensure a comprehensive approach to performance improvement.

Caching Strategies

Implementing caching strategies is crucial for reducing server load. It also speeds up response times.

  • Opcode Caching can greatly reduce PHP’s compilation time. Use OPcache and tools like it to store precompiled script bytecode. This means that PHP doesn't have to recompile the script each time it's requested.
  • Object Caching speeds up data access. It does this by storing frequently used data objects in memory. Tools like Redis or Memcached can do this. This reduces the need to fetch data from the database on each request, which is time-consuming.

Transition to HTTP/2

HTTP/2 introduces a multitude of improvements over HTTP/1.1, most notably:

  • Multiplexing enables a single connection to carry many client-server requests and responses. This reduces the latency caused by several TCP connections.
  • Server Push enables servers to send resources to the client proactively. This reduces the wait time for later requests.

Optimizing Database Queries and Code

Database interactions are often the bottleneck in web applications. Optimizing them can yield significant performance gains.

  • Indexing: Ensure that your database tables are properly indexed. Indexes can dramatically speed up data retrieval times.
  • Query Optimization: Regularly analyze and optimize your SQL queries. Avoid unnecessary data fetching and complex joins when simpler alternatives are available.
  • Code Profiling: Use profiling tools to identify inefficient PHP code. Tools like Xdebug can help pinpoint slow functions and loops in your code.

By focusing on these areas, you can greatly enhance your PHP applications. But, you might be wondering, "how do I find out where the bottlenecks are in the first place?" That’s where Application Performance Monitoring (APM) comes in!

Why APMs Can Help Achieve a 'Better' App

Application Performance Monitoring (APM) tools offer invaluable insights into your application's performance.

Real-Time Monitoring.

Real-time monitoring in APM tools can help you make your PHP application faster. It involves the continuous observation and analysis of an application's performance metrics.

This process includes tracking critical metrics. These metrics are response times, memory usage, server load, and database query efficiency. These metrics allow quick identification of performance bottlenecks. Performance bottlenecks are parts of the application where performance is poor. By detecting these issues in real-time, you can rapidly diagnose and address them. This reduces downtime and enhances user experience.

An example of an APM tool that provides this capability is Scout APM. It specifically offers real-time monitoring for PHP applications. Scout enables developers to identify and fix performance-related issues as they arise.

Detailed Trace Insights

Detailed Trace Insights are a crucial feature in APM tools. They provide in-depth application analysis.

This feature provides detailed insight into the execution of specific requests or transactions. It allows you to trace the journey of a request from start to finish. It breaks down the process into individual components and operations. The details reveal the precise line of code or database query causing performance issues.

With these insights, APMs enable developers to identify and rectify inefficiencies or errors. Enabling you to fine-tune your app for optimal performance.


PHP 8.3 is not just another update; it's a transformational shift in how PHP powers web applications. You should embrace PHP 8.3 and follow the performance enhancement tips outlined here. Doing this ensures that your app runs faster and more efficiently. Additionally, your users will enjoy a superior user experience. Finally, integrate APM tools like Scout APM into your workflow. APM tools will further streamline your development process and improve your app's performance.

Sarah Morgan photo

Sarah has over 18 years of experience in the software industry. In addition to her current role as a Sr. Product Manager at Scout, she is a featured speaker at Product School and a product strategy consultant for

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