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Implementation of hook_forms(). All node forms share the same form handler

Code

modules/node/node.module, line 2482

<?php
function node_forms() {
  $forms = array();
  if ($types = node_get_types()) {
    foreach (array_keys($types) as $type) {
      $forms[$type . '_node_form']['callback'] = 'node_form';
    }
  }
  return $forms;
}
?>