7 bootstrap.inc variable_del($name)
4.6 bootstrap.inc variable_del($name)
4.7 bootstrap.inc variable_del($name)
5 bootstrap.inc variable_del($name)
6 bootstrap.inc variable_del($name)

Unsets a persistent variable.

Case-sensitivity of the variable_* functions depends on the database collation used. To avoid problems, always use lower case for persistent variable names.


$name: The name of the variable to undefine.

See also



76 calls to variable_del()
aggregator_sanitize_configuration in modules/aggregator/aggregator.module
Checks and sanitizes the aggregator configuration.
aggregator_uninstall in modules/aggregator/aggregator.install
Implements hook_uninstall().
batch_test_stack in modules/simpletest/tests/batch_test.module
Helper function: store or retrieve traced execution data.
block_update_7004 in modules/block/block.install
Add new blocks to new regions, migrate custom variables to blocks.
blog_uninstall in modules/blog/blog.install
Implements hook_uninstall().

... See full list


includes/bootstrap.inc, line 1011
Functions that need to be loaded on every Drupal request.


function variable_del($name) {
  global $conf;

    ->condition('name', $name)
  cache_clear_all('variables', 'cache_bootstrap');

  unset($conf [$name]);