Tag: http — Code Glossary

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Fetch API ES2015

The browser-native Promise-based API for making HTTP requests — replacing XMLHttpRequest with a cleaner interface supporting streaming, CORS, and request/response objects.

1mo ago javascript beginner

HTTP Cookies in PHP PHP 7.3+

Cookies are small key-value pairs sent by the server via Set-Cookie and echoed back by the browser on every request — PHP sets them with setcookie() before any output, with Secure, HttpOnly, and SameSite flags controlling safety.

1mo ago php beginner

HTTP Content Negotiation

The HTTP mechanism by which clients declare what formats, languages, and encodings they accept (Accept, Accept-Language, Accept-Encoding) and servers respond with the best match — or 406 Not Acceptable if none fits.

2mo ago api_design intermediate

CORS — Cross-Origin Resource Sharing PHP 7.0+

A browser security mechanism that blocks JavaScript from making HTTP requests to a different origin — PHP APIs must send specific headers to allow cross-origin requests from permitted frontend origins.

2mo ago security intermediate

EventSource API — Server-Sent Events (Client Side) HTML5

EventSource is the browser API for consuming Server-Sent Events (SSE) — a one-directional server-to-client stream over HTTP that automatically reconnects, ideal for live feeds, notifications, and streaming LLM responses.

2mo ago javascript intermediate

Guzzle HTTP Client PHP 7.2+

Guzzle is PHP's most popular HTTP client library — providing a clean API for making synchronous and asynchronous HTTP requests, handling middleware, retries, authentication, and multipart uploads, with PSR-7 and PSR-18 compliance.

2mo ago php intermediate

Webhooks vs Message Queues

Webhooks push events via HTTP to a registered URL (caller waits for response); message queues decouple sender and receiver — queues are more reliable but require consumer infrastructure.

2mo ago messaging beginner

Headers Already Sent Error PHP 5.0+

PHP sends HTTP headers on first output — any echo, whitespace, or BOM before header() causes 'Cannot modify header information — headers already sent'.

2mo ago php beginner

AbortController — Cancellable Fetch ES2017

AbortController cancels in-flight fetch requests — essential for search-as-you-type, tab switching, and preventing race conditions in PHP API calls.

2mo ago javascript intermediate

AJAX Patterns for PHP Backends ES2017

Patterns for communicating with PHP backends via fetch — JSON APIs, CSRF tokens, error handling, and response parsing.

2mo ago javascript intermediate

Axios — HTTP Client for PHP APIs ES2015

Axios is a promise-based HTTP client with interceptors, automatic JSON parsing, and CSRF token injection — common in Laravel and Symfony frontends.

2mo ago javascript intermediate

URL & URLSearchParams API ES2015

URL and URLSearchParams provide structured URL parsing and query string building — the JavaScript equivalent of PHP's parse_url and http_build_query.

2mo ago javascript beginner

Brotli vs gzip Compression PHP 5.0+

Brotli (br) compresses 15-25% better than gzip for text content — use Brotli for supported browsers (all modern ones), gzip as fallback, both configured at the server level not PHP.

2mo ago performance intermediate

HTTP in Python — requests & httpx Python 3.7+

requests is the standard sync HTTP library; httpx adds async support, HTTP/2, and a similar API — both far more ergonomic than urllib.

2mo ago python beginner

HTTP Request-Response Cycle

The complete lifecycle of an HTTP request — DNS resolution, TCP connection, TLS handshake, request transmission, server processing, and response delivery.

2mo ago networking intermediate

HTTP/3 & QUIC

HTTP/3 runs over QUIC (UDP-based) instead of TCP — eliminating head-of-line blocking, reducing connection setup time, and improving performance on lossy networks.

2mo ago performance advanced

MIME Sniffing & X-Content-Type-Options PHP 5.0+

Browsers that sniff file content to guess MIME type can execute uploaded HTML/JavaScript files as scripts — X-Content-Type-Options: nosniff prevents this.

2mo ago security intermediate

API Error Handling

Returning structured, machine-readable error responses using appropriate HTTP status codes — enabling clients to handle errors programmatically without parsing message strings.

2mo ago api_design intermediate

Asset Versioning & Browser Cache Strategy

Serving static assets with immutable long-lived cache headers plus content-hash filenames — maximising cache hits while guaranteeing instant cache-busting on change.

2mo ago performance beginner

CDN Edge Caching PHP 5.0+

Content Delivery Networks cache responses at edge nodes close to users — reducing latency and origin load, controlled via Cache-Control headers.

2mo ago performance intermediate

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