# 🧠 PHP 7.4 – Feature Hub, Upgrade Guide, and Developer Notes
Released: **28 November 2019**
End of Life: **28 November 2022**
This page is a central resource for PHP 7.4 — including all major new features, deprecations, upgrade notes, and learning articles.
Useful for interview prep, real-world migration, or mastering new syntax.
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## 🔹 New Features
– ✅ [Arrow Functions (`fn`) →](/php-7-4-arrow-functions)
– ✅ [Typed Properties →](/php-7-4-typed-properties)
– ✅ [Null Coalescing Assignment (`??=`) →](/php-7-4-null-coalescing)
– ✅ [Spread Operator in Arrays →](/php-7-4-spread-operator)
– ✅ [Numeric Literal Separator →](/php-7-4-literal-separator)
– ✅ [WeakReference →](/php-7-4-weak-reference)
– ✅ [Preloading →](/php-7-4-preloading)
– ✅ [ReflectionType Enhancements →](/php-7-4-reflectiontype)
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## ⚠️ Deprecations & Gotchas
– ❌ [Curly Brace Array Access →](/php-7-4-curly-deprecation)
– ❌ [implode() Parameter Order →](/php-7-4-implode-fix)
– ❌ [Magic Quotes & `real` Type →](/php-7-4-magic-deprecations)
– ❌ [Uninitialized Typed Properties →](/php-7-4-uninit-error)
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## 🧪 Upgrade Notes
– [Full Upgrade Checklist →](/php-7-4-upgrade-checklist)
– [Laravel Compatibility Issues →](/php-7-4-laravel-warning)
– [How to Enable Preloading →](/php-7-4-preload-config)
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## 🚀 Performance Benchmarks
– Up to **15% faster** than PHP 7.3
– [Real-world Benchmarks →](/php-7-4-performance)
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## 📘 RFC Index (Official)
– [PHP.net RFC Archive →](https://wiki.php.net/rfc#php_74)
– [Release Announcement →](https://www.php.net/releases/7_4_0.php)
– [Full Migration Guide →](https://www.php.net/manual/en/migration74.php)
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## 🧠 My Developer Notes
– Typed properties are powerful but need null safety
– Arrow functions improve readability drastically
– Preloading is cool but hard to debug
– [See my tips for projects upgrading from 7.3 →](/php-7-4-real-upgrade-tips)
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## 🔖 Tags: `php-7.4`, `upgrade-guide`, `laravel`, `performance`, `rfc`, `deprecations`
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