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Validating URLs and email addresses in PHP

This is a simple method for validating both email addresses and URLs. Using PHP's filter_var() function, it's actually very easy and doesn't require regular expressions. The following wrapper functions force a true boolean response, so you can use them safely in your logic.

Email addresses #

function is_email($email) {
  return filter_var($email, FILTER_VALIDATE_EMAIL) !== false;

URLs #

function is_url($url) {
  return filter_var($url, FILTER_VALIDATE_URL) !== false;

If you choose to not use the wrappers, just remember that filter_var() doesn't always return a boolean value. It will return the original string on success, and false on failure..