7 calls to valid_url()

aggregator_form_opml_submit in drupal/core/modules/aggregator/aggregator.admin.inc
Form submission handler for aggregator_form_opml().
form_validate_url in drupal/core/includes/form.inc
Form element validation handler for #type 'url'.
UrlTest::testDrupalParseUrl in drupal/core/modules/system/lib/Drupal/system/Tests/Common/UrlTest.php
Tests drupal_parse_url().
ValidUrlUnitTest::testInvalidAbsolute in drupal/core/modules/system/lib/Drupal/system/Tests/Common/ValidUrlUnitTest.php
Tests invalid absolute URLs.
ValidUrlUnitTest::testInvalidRelative in drupal/core/modules/system/lib/Drupal/system/Tests/Common/ValidUrlUnitTest.php
Tests invalid relative URLs.
ValidUrlUnitTest::testValidAbsolute in drupal/core/modules/system/lib/Drupal/system/Tests/Common/ValidUrlUnitTest.php
Tests valid absolute URLs.
ValidUrlUnitTest::testValidRelative in drupal/core/modules/system/lib/Drupal/system/Tests/Common/ValidUrlUnitTest.php
Tests valid relative URLs.