valid_email_address

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Definition

valid_email_address($mail)
includes/common.inc, line 781

Description

Verify the syntax of the given e-mail address.

Empty e-mail addresses are allowed. See RFC 2822 for details.

Parameters

$mail A string containing an e-mail address.

Return value

TRUE if the address is in a valid format.

Related topics

Name	Description
Input validation	Functions to validate user input.

Code

<?php
function valid_email_address($mail) {
  $user = '[a-zA-Z0-9_\-\.\+\^!#\$%&*+\/\=\?\`\|\{\}~\']+';
  $domain = '(?:(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.?)+';
  $ipv4 = '[0-9]{1,3}(\.[0-9]{1,3}){3}';
  $ipv6 = '[0-9a-fA-F]{1,4}(\:[0-9a-fA-F]{1,4}){7}';

  return preg_match("/^$user@($domain|(\[($ipv4|$ipv6)\]))$/", $mail);
}
?>