function variable_del

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7 variable_del($name)
4.6 variable_del($name)
4.7 variable_del($name)
5 variable_del($name)
6 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



75 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/, line 996
Functions that need to be loaded on every Drupal request.


function variable_del($name) {
  global $conf;

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