How to send variable to the javascript in Drupal? [closed]

Question

What is the easiest way to send a value from PHP to Javascript in Drupal form?

Answer 1

The standard way to do this in Drupal is with drupal_add_js(), using the "setting" type, e.g.:

drupal_add_js(array('variableName' => 'value'), 'setting');

That will make the variable available on the JS side at Drupal.settings.variableName.