Intermediate terms
Defence in Depth
PHP 5.0+
4
Layering multiple independent security controls so that bypassing one does not compromise the whole system.
6mo ago
General intermediate
Defensive Programming
1
Writing code that anticipates and handles invalid inputs, unexpected states, and failures gracefully.
6mo ago
Code Quality intermediate
Dependency Inversion Principle (DIP)
PHP 5.0+
3
High-level modules should not depend on low-level modules — both should depend on abstractions (interfaces), not on concrete implementations.
6mo ago
PHP intermediate
Deployment Rollback Strategies
PHP 5.0+
4
Strategies for reverting a broken deployment quickly — from git revert and re-deploy to instant traffic switching with blue-green or feature flags.
6mo ago
DevOps intermediate
Divergent Change
One class changes for many different reasons — a sign it has too many responsibilities.
6mo ago
Code Quality intermediate
DNS Record Types
DNS records map domain names to various targets — A (IPv4), AAAA (IPv6), CNAME (alias), MX (mail), TXT (verification/SPF), SRV (services), and NS (nameservers).
6mo ago
Networking intermediate
DNS Resolution
1
The process of translating a human-readable domain name into an IP address via a hierarchy of DNS servers.
6mo ago
Networking intermediate
DOM-Based XSS
ES5
2
Malicious script is injected and executed via the browser DOM without any server-side involvement.
CWE-79 OWASP A3:2021
6mo ago
Security intermediate
6.1
DORA Metrics
PHP 5.0+
1
Four metrics from the DevOps Research and Assessment team that predict software delivery performance: deployment frequency, lead time, change failure rate, and time to restore.
6mo ago
DevOps intermediate
Dynamic Analysis (DAST)
Testing a running application by sending crafted inputs to discover vulnerabilities that only manifest at runtime.
6mo ago
General intermediate
Dependency Injection
PHP 5.0+
3
Passing dependencies into a class rather than creating them inside — makes classes testable and loosely coupled.
7mo ago
Code Quality intermediate