3 calls to file_validate_extensions()

FileValidatorTest::testFileValidateExtensions in modules/simpletest/tests/file.test: Test the file_validate_extensions() function.
file_save_upload in includes/file.inc: Saves a file upload to a new location.
hook_file_insert in modules/system/system.api.php: Respond to a file being added.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.