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Terms are connected by reviewed, typed relationships, making it possible to follow how ideas relate across the entire corpus. Every connection is sourced, reviewed, and tracked, while the system continuously checks for missing links, dead references, and gaps in coverage.
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Glossary
A developer glossary, written to teach — built to be cited.
1.5k terms across 33 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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- Prompt Injection Attack Often seen in AI Agents & Tool Use 2h
- Key Array Functions (array_map, array_filter, array_reduce…) Contains compact() & extract() — Variable Packing 2h
- Python async/await & asyncio Leverages Python Generators & yield 2h
- Python async/await & asyncio Leverages Context Managers & with Statement 2h
- SOLID Principles (Overview) Contains Dependency Inversion Principle (DIP) 2h
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Most referenced terms
PWA Installation & Add to Homescreen 10
AI Model Selection Criteria 5
Server-Side Request Forgery (SSRF) 4
JWT Vulnerabilities 4
Insecure Cookie 4
Cloud Backup & Disaster Recovery 4
Long Polling vs SSE vs WebSockets 3
Deprecation Notices & Migration Strategy 3
Most active categories
How they use it
crawler 62k
crawler_json 4.8k
rag 1
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23 Mar 2026
Last 7 days
12.8k pings
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2.9k
API Mocking
1
Prism (OpenAPI mock server), WireMock (HTTP stub server), Mockoon (GUI), and Guzzle MockHandler for PHP unit tests — enabling testing without real API calls.
↻ 22h ago
api_design intermediate
Code Documentation Standards
PHP 5.0+
1
When, what, and how to document — the right balance between self-documenting code and explicit documentation for APIs, non-obvious decisions, and complex algorithms.
↻ 22h ago
style beginner
Flaky Tests
Tests that pass and fail non-deterministically on the same code — caused by shared state, timing dependencies, external services, or random data.
↻ 22h ago
testing intermediate
HTTP Status Codes
Three-digit codes in HTTP responses that indicate whether a request succeeded, failed, or requires further action.
↻ 22h ago
networking beginner
Loop Style Preferences
PHP 7.4+
Choose the clearest loop construct for the job: foreach for collections, for with index when position matters, while for condition-driven iteration.
↻ 22h ago
style beginner
Mocking Best Practices (PHPUnit & Mockery)
PHP 5.0+ Guidelines for effective mocking: mock interfaces not classes, avoid over-mocking, prefer stubs for queries and mocks for commands.
↻ 22h ago
testing intermediate
NAT & Port Forwarding
NAT maps multiple private IPs to one public IP — understanding NAT explains why ngrok is needed for local webhook testing and how Docker port mapping works.
↻ 22h ago
networking intermediate
Register Allocation
PHP 8.0+
6
A compiler back-end pass that maps an unbounded set of virtual registers (or IR variables) to a finite set of physical CPU registers.
↻ 22h ago
compiler advanced
Regression Testing
Re-running existing tests after code changes to verify that previously working functionality has not been broken — the primary safety net for continuous delivery.
↻ 22h ago
testing beginner
Test Data Builders
PHP 7.0+
A pattern for constructing test objects with sensible defaults that can be selectively overridden — reducing test setup noise and making the relevant data explicit.
↻ 22h ago
testing intermediate
Test Pyramid
PHP 5.0+
5
A model advocating many fast unit tests at the base, fewer integration tests in the middle, and a small number of slow E2E tests at the top.
↻ 22h ago
testing beginner
Aggregate Design Heuristics
PHP 7.0+ Rules for sizing aggregates correctly — small aggregates with single-entity transactions, referencing other aggregates by ID, and designing boundaries around invariants not convenience.
↻ 2d ago
architecture advanced
Block Cipher Modes
PHP 7.1+
How a block cipher (AES) processes data larger than one block — ECB is insecure, CBC requires a MAC, GCM provides authenticated encryption and is the correct choice.
↻ 2d ago
cryptography advanced
AI Hallucination
9
When an LLM generates confident, plausible-sounding text that is factually incorrect — a fundamental property of next-token prediction, not a bug to be patched away.
↻ 6d ago
ai_ml intermediate
Catastrophic Backtracking
PHP 5.3+
2
A regex engine failure mode where certain patterns combined with specific inputs cause exponential backtracking, making the match take seconds or minutes — a common denial-of-service vector called ReDoS.
↻ 7d ago
regex intermediate
Rust async/await
2
Rust's async/await syntax builds state-machine futures that run on an executor, enabling concurrency without blocking OS threads.
↻ 7d ago
rust advanced
CORS Misconfiguration
PHP 5.0+
Overly permissive Cross-Origin Resource Sharing headers allow malicious sites to read sensitive API responses.
CWE-942 OWASP A5:2021
↻ 1w ago
security intermediate
7.5
CRLF Injection
PHP 5.0+
Injecting carriage-return and line-feed characters into HTTP headers splits responses or injects new headers, enabling log poisoning and XSS.
CWE-93 OWASP A3:2021
↻ 1w ago
security intermediate
6.1
CSS Injection & Data Exfiltration via Stylesheets
Attacker-controlled CSS injected into a page or stylesheet that exfiltrates data via attribute selectors and `url()` callbacks, defaces UI, or enables phishing — all without a single line of JavaScript.
CWE-79 OWASP A3:2021
↻ 1w ago
security advanced
6.5
Dependency & Supply Chain Security
Protecting applications from malicious or vulnerable third-party packages — covering transitive dependencies, lock files, SRI hashes, CVE scanning, and supply chain attack vectors.
CWE-1357 OWASP A6:2021
↻ 1w ago
security intermediate