drupal_is_denied

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Definition

drupal_is_denied($type, $mask)
includes/bootstrap.inc, line 908

Description

Perform an access check for a given mask and rule type. Rules are usually created via admin/user/rules page.

If any allow rule matches, access is allowed. Otherwise, if any deny rule matches, access is denied. If no rule matches, access is allowed.

Parameters

$type string Type of access to check: Allowed values are:

• 'host': host name or IP address
• 'mail': e-mail address
• 'user': username

$mask string String or mask to test: '_' matches any character, '%' matches any number of characters.

Return value

bool TRUE if access is denied, FALSE if access is allowed.

Code

<?php
function drupal_is_denied($type, $mask) {
  // Because this function is called for every page request, both cached
  // and non-cached pages, we tried to optimize it as much as possible.
  // We deny access if the only matching records in the {access} table have
  // status 0 (deny). If any have status 1 (allow), or if there are no
  // matching records, we allow access.
  $sql = "SELECT 1 FROM {access} WHERE type = '%s' AND LOWER('%s') LIKE LOWER(mask) AND status = %d";
  return db_result(db_query_range($sql, $type, $mask, 0, 0, 1)) && !db_result(db_query_range($sql, $type, $mask, 1, 0, 1));
}
?>