Developer Guide
Regex for Developers - Practical Guide
Master regular expressions with real-world examples. Learn pattern matching, data validation, text processing, and performance optimization techniques.
What is Regex?
Regular expressions (regex) are powerful patterns used to match character combinations in strings. They are essential tools for developers working with text processing, validation, and data extraction.
From simple email validation to complex log file parsing, regex helps you write concise and efficient code.
Common Regex Patterns
Email Validation
/^[^\s@]+@[^\s@]+\.[^\s@]+$/URL Matching
/^https?:\/\/.+/Phone Number (US)
/^\(\d3\) \d3-\d4$/Try Our Regex Tester
Test and debug your regex patterns with our professional Regex Tester with live matching and explanations:
Topics Covered
- → Regex basics and syntax
- → Character classes and quantifiers
- → Groups and capturing
- → Lookaheads and lookbehinds
- → Common validation patterns
- → Text processing and extraction
- → Performance optimization
- → Testing and debugging