function check_url

Strips dangerous protocols from a URI and encodes it for output to HTML.

Parameters

$uri: A plain-text URI that might contain dangerous protocols.

Return value

A URI stripped of dangerous protocols and encoded for output to an HTML attribute value. Because it is already encoded, it should not be set as a value within a $attributes array passed to drupal_attributes(), because drupal_attributes() expects those values to be plain-text strings. To pass a filtered URI to drupal_attributes(), call drupal_strip_dangerous_protocols() instead.

See also

drupal_strip_dangerous_protocols()

Related topics

Sanitization functions
Functions to sanitize values.
17 calls to check_url()
CommentTokenReplaceTestCase::testCommentTokenReplacement in drupal/modules/comment/comment.test
Creates a comment, then tests the tokens generated from it.
comment_tokens in drupal/modules/comment/comment.tokens.inc
Implements hook_tokens().
CommonURLUnitTest::testLXSS in drupal/modules/simpletest/tests/common.test
Confirm that invalid text given as $path is filtered.
CommonXssUnitTest::testBadProtocolStripping in drupal/modules/simpletest/tests/common.test
Check that harmful protocols are stripped.
format_rss_channel in drupal/includes/common.inc
Formats an RSS channel.

... See full list

File

drupal/includes/common.inc, line 1436
Common functions that many Drupal modules will need to reference.

Code

function check_url($uri) {
  return check_plain(drupal_strip_dangerous_protocols($uri));
}