Skip to contentRegex patterns match and extract text — used in validation, search-replace and log parsing.
Regular expressions describe character sequences: digits (\d), word chars (\w), repeats (+, *), groups () and anchors (^, $). Flavor differences (PCRE vs JavaScript) trip up copy-paste patterns.
Test patterns on sample data before production deploys. Tentaco Regex Tester highlights matches locally — safer than pasting proprietary logs into public regex sites.
