25 uses of WATCHDOG_ERROR

drupal_chmod in drupal/core/includes/file.inc
Sets the permissions on a file or directory.
drupal_convert_to_utf8 in drupal/core/includes/unicode.inc
Converts data to UTF-8.
drupal_error_levels in drupal/core/includes/errors.inc
Maps PHP error constants to watchdog severity levels.
drupal_mail in drupal/core/includes/mail.inc
Composes and optionally sends an e-mail message.
ExceptionController::decodeException in drupal/core/lib/Drupal/Core/Controller/ExceptionController.php
This method is a temporary port of _drupal_decode_exception().
file_cron in drupal/core/modules/file/file.module
Implements file_cron()
file_save_htaccess in drupal/core/includes/file.inc
Creates a .htaccess file in the given directory.
file_scan_directory in drupal/core/includes/file.inc
Finds all files that match a given mask in a given directory.
file_unmanaged_copy in drupal/core/includes/file.inc
Copies a file to a new location without invoking the file API.
file_unmanaged_delete in drupal/core/includes/file.inc
Deletes a file without database changes or hook invocations.
image_crop_effect in drupal/core/modules/image/image.effects.inc
Image effect callback; Crop an image resource.
image_desaturate_effect in drupal/core/modules/image/image.effects.inc
Image effect callback; Desaturate (grayscale) an image resource.
image_resize_effect in drupal/core/modules/image/image.effects.inc
Image effect callback; Resize an image resource.
image_rotate_effect in drupal/core/modules/image/image.effects.inc
Image effect callback; Rotate an image resource.
image_scale_and_crop_effect in drupal/core/modules/image/image.effects.inc
Image effect callback; Scale and crop an image resource.
image_scale_effect in drupal/core/modules/image/image.effects.inc
Image effect callback; Scale an image resource.
image_style_create_derivative in drupal/core/modules/image/image.module
Creates a new image derivative based on an image style.
locale_translation_download_source in drupal/core/modules/locale/locale.batch.inc
Downloads source file from a remote server.
PoDatabaseWriter::importString in drupal/core/modules/locale/lib/Drupal/locale/PoDatabaseWriter.php
Imports one string into the database.
system_check_directory in drupal/core/modules/system/system.module
Checks the existence of the directory specified in $form_element.
user_cancel in drupal/core/modules/user/user.module
Cancel a user account.
_drupal_decode_exception in drupal/core/includes/errors.inc
Decodes an exception and retrieves the correct caller.
_drupal_valid_path_new_router in drupal/core/includes/path.inc
Temporary helper function to check a path in the new routing system.
_form_validate in drupal/core/includes/form.inc
Performs validation on form elements.
_locale_rebuild_js in drupal/core/modules/locale/locale.module
(Re-)Creates the JavaScript translation file for a language.