function drupal_valid_http_host in Drupal 7

Same name and namespace in other branches

1. 5 includes/bootstrap.inc \drupal_valid_http_host()
2. 6 includes/bootstrap.inc \drupal_valid_http_host()

Validates that a hostname (for example $_SERVER['HTTP_HOST']) is safe.

Return value

TRUE if only containing valid characters, or FALSE otherwise.

2 calls to drupal_valid_http_host()

BootstrapIPAddressTestCase::testIPAddressHost in modules/simpletest/tests/bootstrap.test

test IP Address and hostname

drupal_environment_initialize in includes/bootstrap.inc

Initializes the PHP environment.

File

includes/bootstrap.inc, line 728

Functions that need to be loaded on every Drupal request.

Code

function drupal_valid_http_host($host) {

  // Limit the length of the host name to 1000 bytes to prevent DoS attacks with
  // long host names.
  return strlen($host) <= 1000 && substr_count($host, '.') <= 100 && substr_count($host, ':') <= 100 && preg_match('/^\\[?(?:[a-zA-Z0-9-:\\]_]+\\.?)+$/', $host);
}