git.defcon.no Git - hermes/blob - api/lib/check_email.php

   1 <?php
   2
   3 function check_email_address($email) {
   4         // First, we check that there's one @ symbol,
   5         // and that the lengths are right.
   6         if (!ereg("^[^@]{1,64}@[^@]{1,255}$", $email)) {
   7                 // Email invalid because wrong number of characters
   8                 // in one section or wrong number of @ symbols.
   9                 return false;
  10         }
  11         // Split it into sections to make life easier
  12         $email_array = explode("@", $email);
  13         $local_array = explode(".", $email_array[0]);
  14         for ($i = 0; $i < sizeof($local_array); $i++) {
  15                 if
  16                         (!ereg("^(([A-Za-z0-9!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$",
  17                                $local_array[$i])) {
  18                                 return false;
  19                         }
  20         }
  21         // Check if domain is IP. If not,
  22         // it should be valid domain name
  23         if (!ereg("^\[?[0-9\.]+\]?$", $email_array[1])) {
  24                 $domain_array = explode(".", $email_array[1]);
  25                 if (sizeof($domain_array) < 2) {
  26                         return false; // Not enough parts to domain
  27                 }
  28                 for ($i = 0; $i < sizeof($domain_array); $i++) {
  29                         if
  30                                 (!ereg("^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]+))$",
  31                                        $domain_array[$i])) {
  32                                         return false;
  33                                 }
  34                 }
  35         }
  36         return true;
  37 }
  38 ?>