Regular expressions (regex) are powerful tools for pattern matching and text manipulation. Here are some advanced concepts:

  • Modifiers
    Use flags like i (ignore case) or m (multiline) to change matching behavior.

    regex_modifiers

  • Special Characters
    Characters like . (dot), * (asterisk), and + (plus) have specific meanings.

    regex_special_characters

  • Lookaheads & Lookbehinds
    Advanced assertions for conditional matching.

    regex_lookaheads

For more detailed examples, check our Regex Basics Guide.

Need help with specific use cases? 🤔

Click to see advanced examples - Email validation: `^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$` - IP address matching: `\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b` - Date pattern: `\d{4}-\d{2}-\d{2}`
regex_advanced_usage