Test Regex for Form Validation
Write and test regular expressions for validating emails, phone numbers, postcodes, and other form inputs.
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Form Validation tips
Test your validation pattern against both valid and invalid inputs before adding it to your code. Edge cases are easy to miss.
Email validation regex is surprisingly complex. A practical pattern: ^[^\s@]+@[^\s@]+\.[^\s@]+$ — simpler patterns catch most real addresses.
Phone number formats vary by country. Consider whether to validate format or just digits — stricter validation can frustrate international users.
Use named capture groups (?<year>\d{4}) to extract parts of matched strings in your validation code.
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