hook_validate
Definition
hook_validate(&$node)
developer/hooks/node.php, line 250
Description
Verify a node editing form.
This is a hook used by node modules. It is called to allow the module to verify that the node is in a format valid to post to the site. It can also be used to make changes to the node before submission, such as node-type-specific formatting. Errors should be set with form_set_error().
To validate nodes of all types (not just nodes of the type(s) defined by this module), use hook_nodeapi() instead.
For a detailed usage example, see node_example.module.
Parameters
&$node The node to be validated.
Return value
None.
Related topics
Name | Description |
|---|---|
| Hooks | Allow modules to interact with the Drupal core. |
Code
<?php
function hook_validate(&$node) {
if ($node) {
if ($node->end && $node->start) {
if ($node->start > $node->end) {
form_set_error('time', t('An event may not end before it starts.'));
}
}
}
}
?>