How to add a validation function before the one set by core or other modules
Make sure you module wight in the system table are higher than the modules you want to override.
<?php
//in form_alter hook
$temp_form = $form['#validate'];
unset($form['#validate']);
$form['#validate'][] = "my_validation_function";
foreach ($temp_form as $id => $val_func) {
$form['#validate'][] = $val_func;
}
?>Knowledge keywords: