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Written for developers. Structured for AI citation.

A developer glossary, written to teach — built to be cited.

1.4k terms across 32 categories — definitions, examples, common mistakes and fixes. Authored under one editorial standard. Cross-linked, searchable, and openly crawled by AI agents.

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Most referenced terms

CSRF Token Handling in Fetch & Axios 3 ereg() / eregi() — POSIX Regex Removed in PHP 7 2 Smoke Testing 2 Semantic Search 2 Flame Graphs for PHP Profiling 2 Fetch API & HTTP Requests 2 God Class 2 Composite Pattern 2

Division by Zero & DivisionByZeroError 10 Undefined Array Key / Offset Errors 8 PHP Execution Model — Shared-Nothing Architecture 6 Psalm Type Annotations 5 PDOStatement::bindParam() vs bindValue() 5 Transaction Script Pattern 4 Retry Pattern with Exponential Backoff 4 AI Prompt Versioning 4

Test-Driven Development (TDD) 1.5k Dijkstra's Shortest Path Algorithm 1.2k Smoke Testing 283 Write-Ahead Log (WAL) 196 Array Destructuring ([] = …) 193 Type Coercion 184 Raft Consensus Algorithm 164 password_hash() — Native Bcrypt (PHP 5.5) 161

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php 37 security 19 quality 14 javascript 13 database 9 testing 9 performance 9 architecture 7

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Diagram: Session Fixation

Session Fixation PHP 5.0+

An attacker forces a victim to use a known session ID, then hijacks their session after they authenticate.

CWE-384 OWASP A7:2021

2mo ago security intermediate 8.0

Single Responsibility Principle PHP 5.0+

A class or function should have one reason to change — doing one thing and doing it well.

2mo ago general beginner

SOLID Principles (Overview) PHP 5.0+

Five object-oriented design principles — SRP, OCP, LSP, ISP, DIP — that together guide towards maintainable, extensible code.

2mo ago quality intermediate

Diagram: SQL Injection

SQL Injection PHP 5.1+

Unsanitised user input inserted directly into a SQL query, letting attackers read, modify, or delete database data.

CWE-89 OWASP A3:2021

2mo ago security intermediate 9.8

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.

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.

RangeError — Stack Overflow & Invalid Values ES5

RangeError is thrown when a value is outside its allowed range — most commonly from infinite recursion (stack overflow) or invalid array/string sizes.

javascript intermediate

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