Regex-Tester

/^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/gm

/(?:\+?1[-.]?)?\(?([0-9]{3})\)?[-.]?([0-9]{3})[-.]?([0-9]{4})/g

/https?:\/\/[^\s]+/gi

/<(?<tag>\w+)(?<attrs>[^>]*)>(?<content>.*?)<\/\k<tag>>/gs

/\b(?<month>\d{1,2})[/-](?<day>\d{1,2})[/-](?<year>\d{4})\b|\b(?<year2>\d{4})-(?<month2>\d{2})-(?<day2>\d{2})\b/g

/(?<selector>[.#])(?<name>[a-zA-Z][a-zA-Z0-9_-]*)/g