codewithhemu

LeetCode #1: Two Sum Problem Solution in PHP

March 29, 2026

📌 Introduction The Two Sum problem is one of the most popular coding interview questions and is often asked in...

What is dependency injection container?

March 29, 2026

A Dependency Injection Container (DIC) is a tool (or system) that automatically manages and provides dependencies (objects) to your classes....

What is memory management in PHP?

March 29, 2026

Memory Management in PHP refers to how PHP allocates, uses, and frees memory during the execution of a script. It...

What is OPcache?

March 29, 2026

OPcache (Opcode Cache) is a built-in PHP extension that improves performance by storing precompiled PHP scripts in memory, so PHP...

What is caching in PHP?

March 29, 2026

Caching in PHP is a technique used to store frequently accessed data temporarily so that it can be reused quickly...

What is Output Buffering in PHP?

March 29, 2026

Output Buffering in PHP is a technique where the output (like echo, print, HTML) is not sent immediately to the...

What is a Function in PHP? | Complete Beginner to Advanced Guide with Examples 🚀

March 29, 2026

📌 Introduction In PHP, a function is a reusable block of code that performs a specific task. Instead of writing...

Phantom Reads, Dirty Reads & Non-Repeatable Reads Explained

March 22, 2026

📌 Introduction When multiple transactions run at the same time in MySQL, you can face data inconsistency issues known as:...

Deadlocks in MySQL – Causes, Detection & Prevention

March 22, 2026

📌 Introduction In high-concurrency systems, multiple transactions often try to access the same data simultaneously. This can lead to a...

Optimistic vs Pessimistic Locking in MySQL

March 22, 2026

📌 Introduction When multiple users try to update the same data in a database, it can lead to data inconsistency...