Benjamin Crozat The web developer life

PHP 8.3: new features (with RFCs) and release date.

Benjamin Crozat Benjamin Crozat2 minutes read

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PHP 8.3: new features (with RFCs) and release date.
Table of contents

According to the preparation tasks list, PHP 8.3 will be released on November 23, 2023, after three alpha releases, three beta, and six release candidates.

PHP is an open-source project. Knowing what’s going on for the next version only takes a minute of research. For instance, this page lists all the accepted RFCs for PHP 8.3.

PHP 8.3 new features and changes


Instead of using json_decode() to validate a JSON string, you can now use json_validate(). According to its RFC, it also consumes fewer resources.

json_validate('{ "foo": "bar", }');
// Syntax error
echo json_last_error_msg();

As you can see, json_validate() returns a boolean, and you can fetch the error message with json_last_error() or json_last_error_msg() for more details.

Learn more: PHP RFC: json_validate

Improved unserialize() error handling

PHP 8.3 will allow better error handling when unserializing.

I’m not familiar with custom unserialization, but I’ll do my best to explain how this RFC works in the simplest way possible.

Until now, we had to rely on horrible code where we had to set a custom error handler before calling the unserialize() function.

try {
set_error_handler(static function ($severity, $message, $file, $line) {
throw new ErrorException($message, 0, $severity, $file, $line);
$result = unserialize($serialized);
} catch (Throwable $e) {
// Unserialization failed. Catch block optional if the error should not be handled.
} finally {

In PHP 8.3, we’ll be able to handle errors directly in our __unserialize() magic method:

function unserialize(string $data): mixed
try {
} catch (Throwable $e) {
throw new UnserializationFailedException(previous: $e);

Learn more: PHP RFC: Improve unserialize() error handling

That’s it for PHP 8.3 so far. 👍

I will report every new accepted RFC in the coming months!

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