hook_validate
Definition
hook_validate($node, &$form)
docs-5/hooks/node.php, line 379
Description
Verify a node editing form.
This is a hook used by node modules. It is called to allow the module to verify that the node is in a format valid to post to the site. Errors should be set with form_set_error().
To validate nodes of all types (not just nodes of the type(s) defined by this module), use hook_nodeapi() instead.
Changes made to the $node object within a hook_validate() function will have no effect. The preferred method to change a node's content is to use hook_submit() or hook_nodeapi($op='submit') instead. If it is really necessary to change the node at the validate stage, you can use function form_set_value().
For a detailed usage example, see node_example.module.
Parameters
$node The node to be validated.
$form The node edit form array.
Return value
None.
Related topics
Name | Description |
|---|---|
| Hooks | Allow modules to interact with the Drupal core. |
Code
<?php
function hook_validate($node, &$form) {
if (isset($node->end) && isset($node->start)) {
if ($node->start > $node->end) {
form_set_error('time', t('An event may not end before it starts.'));
}
}
}
?>