<ul><li>PHP 8.4 brings optimizations to the Zend Engine, improving speed and stability of PHP applications.</li><li>Updates include efficient stack usage for recursive functions, enhanced JIT compilation, and optimized operations like property access.</li><li>The addition of json_validate() simplifies JSON validation process for developers.</li><li>Support for typed class constants improves code predictability and consistency.</li><li>PHP 8.4 enhances behavior when calling unset() on undefined object properties to catch potential bugs.</li><li>Typed constants aid in immutability, reducing boilerplate code in class definitions.</li><li>Internal improvements to random number generation enhance control for scenarios like games and simulations.</li><li>DateTimeImmutable and DateTimeInterface classes see refinements for more accurate time manipulation.</li><li>Stricter argument count checks in internal functions improve error reporting and prevent runtime issues.</li><li>PHP 8.4 focuses on security enhancements and backward compatibility with third-party extensions.</li></ul>

PHP 8.4: New Features Every Developer Should Know

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