Terms starting with "I"
Internal Developer Platform (IDP)
A curated, self-service layer on top of cloud and CI/CD infrastructure that product teams use to ship services without filing tickets — paved roads that make the right thing the easy thing.
3w ago
devops intermediate
Insecure Deserialization
Deserializing attacker-controlled data can trigger arbitrary object construction and method calls — PHP's unserialize() with untrusted input enables remote code execution via gadget chains in the loaded class graph.
CWE-502 OWASP A8:2021
4w ago
security advanced
Image Optimisation
Reducing image file size and delivery overhead through format choice (AVIF, WebP), compression, responsive sizing (srcset), lazy loading, and explicit dimensions — the single highest-impact performance lever for most websites.
1mo ago
performance intermediate
InnoDB vs MyISAM
InnoDB is the default MySQL storage engine supporting transactions, foreign keys, and row-level locking — MyISAM is legacy with table-level locking and no transaction support.
1mo ago
database beginner
INSERT ... ON DUPLICATE KEY UPDATE PHP 5.1+
An atomic MySQL upsert — inserts a new row or updates the existing one if a unique key constraint would be violated.
1mo ago
database intermediate
ICU Message Format PHP 7.0+
A standard syntax for translatable strings that handles pluralisation, gender, number formatting, and date formatting in a single expression — supported by PHP's intl extension via MessageFormatter.
2mo ago
i18n intermediate
Import Maps ES2020
Import maps let browsers resolve bare module specifiers (import 'lodash') without a bundler — mapping module names to URLs in a JSON script tag.
2mo ago
javascript intermediate
infer Keyword in Conditional Types 2.8
The infer keyword inside conditional types lets TypeScript extract and name a type from within a generic structure — enabling ReturnType<T>, Awaited<T>, and custom type extraction.
2mo ago
typescript advanced
Inline Temp Variable Refactoring
Inline Temp removes a temporary variable used only once when its name adds no clarity — replacing the variable reference with its expression directly.
2mo ago
quality beginner
Intersection & DNF Types in Practice PHP 8.1+
PHP 8.1 intersection types (A&B) and PHP 8.2 DNF types ((A&B)|null) allow precise type constraints for objects implementing multiple interfaces.
2mo ago
php advanced
IntersectionObserver API HTML5
IntersectionObserver fires when an element enters or leaves the viewport — the modern way to implement lazy loading, infinite scroll, and scroll-triggered animations.
2mo ago
javascript intermediate
Inverted Index
A data structure that maps each unique word to the list of documents containing it — the foundation of all full-text search engines, enabling fast lookup of documents matching a query term.
2mo ago
search intermediate
IoC Container PHP 7.0+
An Inversion of Control container automatically resolves and injects class dependencies — you declare what a class needs, the container figures out how to create it, eliminating manual dependency wiring.
2mo ago
quality intermediate
Implicit Globals & strict mode ES5
Assigning to an undeclared variable in non-strict mode silently creates a global — use 'use strict' or ES modules to prevent accidental global pollution.
2mo ago
javascript intermediate
Integer Overflow & PHP_INT_MAX PHP 4.0+
PHP integers silently overflow to float when exceeding PHP_INT_MAX (9.2×10¹⁸ on 64-bit) — use BCMath or GMP for arbitrary precision arithmetic.
2mo ago
php intermediate
IndexedDB ES2015
Browser-native NoSQL database for offline-capable PHP web apps — stores structured data that survives page reloads, complements service workers.
2mo ago
javascript advanced
Image Optimisation PHP 7.0+
Serving images in modern formats (WebP, AVIF), at the correct size, with appropriate compression — typically the single biggest performance win for image-heavy pages.
2mo ago
performance intermediate
Inconsistent Indentation
Mixing tabs and spaces, or using varying numbers of spaces for indentation — causes visual misalignment across editors and makes diffs noisy.
2mo ago
style beginner
InnerSource
Open-source collaboration practices inside an organisation — any team can contribute to any internal repository, reducing silos.
2mo ago
general intermediate
Insecure Randomness PHP 7.0+
Using non-cryptographic random functions (rand(), mt_rand(), array_rand()) for security tokens — these are predictable and enable token forgery, session prediction, and CSRF bypass.
2mo ago
security intermediate