In certain situations, you might want to modify a node's form and functionality. In this example, I'll explain how to remove the title field from a node's form and add your own title later.
<?php
// using hook_form_alter to remove the node title input field...
function MYMODULE_form_alter($form_id, &$form) {
// ...code....
if ($form_id == 'MYNODETYPE_node_form' && arg(0)!='admin') {
unset($form['title']);
}
// ...code...
}
// using hook_nodeapi to add the title when the node form is submitted...
function MYMODULE_nodeapi(&$node, $op, $teaser = NULL, $page = NULL) {
// ...code...
if ($node->type == 'MYNODETYPE' && $op == 'submit') {
// get a list of node types
$nodeTypes = node_get_types();
// set the node's title
$node->title = $nodeTypes[$node->type]->name;
}
// ...code...
}
?>