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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Union Types (PHP 8.0) PHP 8.0+ 🧠 2
Allow a parameter, return value, or property to accept multiple specified types, declared as TypeA|TypeB.
3mo ago PHP intermediate
Weak References (WeakReference, WeakMap) PHP 7.4+ 🧠 2
References to objects that don't prevent garbage collection — useful for caches and observer registries that shouldn't extend object lifetimes.
3mo ago PHP advanced
WeakMap (PHP 8.0) PHP 8.0+
A map keyed by objects that doesn't prevent garbage collection — ideal for caching per-object computed data without creating memory leaks.
3mo ago PHP advanced
Xdebug — Debugging & Profiling PHP 5.0+ 🧠 1
The essential PHP debugging extension providing step debugging, stack traces, code coverage, and profiling output.
3mo ago PHP beginner
Closures & Anonymous Functions PHP 5.3+ 🧠 1
First-class anonymous functions that can capture variables from their enclosing scope via the use keyword.
3mo ago PHP intermediate
Diagram: Exception Handling (try/catch/finally) Exception Handling (try/catch/finally) PHP 5.0+ 🧠 3
PHP's structured error handling mechanism that separates error-path code from the happy path and ensures resource cleanup.
3mo ago PHP intermediate
OPcache PHP 5.5+ 🧠 8
A PHP extension that caches precompiled bytecode in shared memory, eliminating repeated parsing and compilation overhead.
3mo ago PHP intermediate
Prepared Statement PHP 5.1+ 🧠 2
A parameterised SQL query where data placeholders are bound separately from the query structure, preventing SQL injection.
3mo ago PHP intermediate
Asymmetric Visibility (PHP 8.4) PHP 8.4+
PHP 8.4 asymmetric visibility lets you set different access levels for reading and writing a property — public(get) protected(set) — without getter/setter methods.
PHP intermediate
Lazy Objects (PHP 8.4) PHP 8.4+
PHP 8.4 native lazy objects defer object initialisation until first property access — previously requiring proxy libraries, now built into the engine via ReflectionClass.
PHP advanced
Property Hooks (PHP 8.4) PHP 8.4+
PHP 8.4 property hooks attach get/set logic directly to a property declaration — eliminating getter/setter method boilerplate for common validation and transformation patterns.
PHP advanced
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