user_validate_name

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Definition

user_validate_name($name)
modules/user.module, line 211

Description

Verify the syntax of the given name.

Code

<?php
function user_validate_name($name) {
  if (!strlen($name)) return t('You must enter a username.');
  if (substr($name, 0, 1) == ' ') return t('The username cannot begin with a space.');
  if (substr($name, -1) == ' ') return t('The username cannot end with a space.');
  if (ereg('  ', $name)) return t('The username cannot contain multiple spaces in a row.');
  if (ereg("[^\x80-\xF7 [:alnum:]@_.-]", $name)) return t('The username contains an illegal character.');
  if (preg_match('/[\x{80}-\x{A0}'.        // Non-printable ISO-8859-1 + NBSP
                 '\x{AD}'.                 // Soft-hyphen
                 '\x{2000}-\x{200F}'.      // Various space characters
                 '\x{2028}-\x{202F}'.      // Bidirectional text overrides
                 '\x{205F}-\x{206F}'.      // Various text hinting characters
                 '\x{FEFF}'.               // Byte order mark
                 '\x{FF01}-\x{FF60}'.      // Full-width latin
                 '\x{FFF9}-\x{FFFD}'.      // Replacement characters
                 '\x{0}]/u',               // NULL byte
                 $name)) {
    return t('The username contains an illegal character.');
  }
  if (ereg('@', $name) && !eregi('@([0-9a-z](-?[0-9a-z])*.)+[a-z]{2}([zmuvtg]|fo|me)?$', $name)) return t('The username is not a valid authentication ID.');
  if (strlen($name) > 56) return t('The username %name is too long: it must be less than 56 characters.', array('%name' => theme('placeholder', $name)));
}
?>