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Apr 10, 2023 · Backend Development

A PHP Web Crawler: Design, Implementation, and Challenges

This article describes a PHP‑based web crawler that extracts links and images using regular expressions, stores URLs in MySQL, handles duplicate detection via MD5, discusses performance limitations, and provides the full source code and usage instructions.

PHPRegexURL processing

0 likes · 8 min read

A PHP Web Crawler: Design, Implementation, and Challenges

Efficient Ops

May 15, 2017 · Fundamentals

What Really Happens When You Type a URL? A Deep Dive into the Full Stack

This article walks through every step from pressing a key on the keyboard to the browser rendering a web page, covering hardware signaling, kernel interrupt handling, DNS resolution, TCP handshakes, HTTP exchange, and final page display, illustrating how many university‑level concepts intersect in a single URL request.

Computer ArchitectureOperating SystemURL processing

0 likes · 10 min read

What Really Happens When You Type a URL? A Deep Dive into the Full Stack