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- <?php
- #### Validation functions ####
- function valid_email($email)
- {
- // First, we check that there's one @ symbol, and that the lengths are right
- if (!ereg("^[^@]{1,64}@[^@]{1,255}$", $email))
- {
- // Email invalid because wrong number of characters in one section, or wrong number of @ symbols.
- return false;
- }
- // Split it into sections to make life easier
- $email_array = explode("@", $email);
- $local_array = explode(".", $email_array[0]);
- for ($i = 0; $i < sizeof($local_array); $i++)
- {
- if (!ereg("^(([A-Za-z0-9!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$",
- $local_array[$i]))
- {
- return false;
- }
- }
- if (!ereg("^\[?[0-9\.]+\]?$", $email_array[1]))
- { // Check if domain is IP. If not, it should be valid domain name
- $domain_array = explode(".", $email_array[1]);
- if (sizeof($domain_array) < 2)
- {
- return false; // Not enough parts to domain
- }
- for ($i = 0; $i < sizeof($domain_array); $i++)
- {
- if (!ereg("^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]+))$", $domain_array[$i]))
- {
- return false;
- }
- }
- }
- return true;
- }
- function valid_username($username, $minlength = 3, $maxlength = 30)
- {
- $username = trim($username);
- if (empty($username))
- {
- return false; // it was empty
- }
- if (strlen($username) > $maxlength)
- {
- return false; // to long
- }
- if (strlen($username) < $minlength)
- {
- return false; //toshort
- }
- $result = ereg("^[A-Za-z0-9_\-]+$", $username); //only A-Z, a-z and 0-9 are allowed
- if ($result)
- {
- return true; // ok no invalid chars
- } else
- {
- return false; //invalid chars found
- }
- return false;
- }
- function valid_password($pass, $minlength = 6, $maxlength = 15)
- {
- $pass = trim($pass);
- if (empty($pass))
- {
- return false;
- }
- if (strlen($pass) < $minlength)
- {
- return false;
- }
- if (strlen($pass) > $maxlength)
- {
- return false;
- }
- $result = ereg("^[A-Za-z0-9_\-]+$", $pass);
- if ($result)
- {
- return true;
- } else
- {
- return false;
- }
- return false;
- }
- ?>
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