hook_validate
- Versions
- 4.6
hook_validate(&$node)- 4.7
hook_validate($node)- 5 – 7
hook_validate($node, &$form)
Perform node validation before a node is created or updated.
This hook is invoked only on the module that defines the node's content type (use hook_node_validate() to act on all node validations).
This hook is invoked from node_validate(), after a user has has finished editing the node and is previewing or submitting it. It is invoked at the end of all the standard validation steps, and before hook_node_validate() is invoked.
To indicate a validation error, use form_set_error().
Note: Changes made to the $node object within your hook implementation will have no effect. The preferred method to change a node's content is to use hook_node_presave() instead. If it is really necessary to change the node at the validate stage, you can use form_set_value().
Parameters
$node The node being validated.
$form The form being used to edit the node.
Related topics
Code
modules/node/node.api.php, line 954
<?php
function hook_validate($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.'));
}
}
}
?>