cck_field_wipe.php

<?php



/**
 * Erase a CCK text field from a node.
 */
function el_commons_wipe_cck_text_field(&$node, $field_name) {
  if (!isset($node->$field_name)) {
    return;
  }
  
  foreach ((array) $node->$field_name as $i => $field) {
    $node->$field_name[$i]['value'] = NULL;
  }
}

/**
 * Erase a CCK node reference field from a node.
 */
function el_commons_wipe_cck_nodereference_field(&$node, $field_name) {
  if (!isset($node->$field_name)) {
    return;
  }
  
  foreach ((array) $node->$field_name as $i => $field) {
    $referenced_node = node_load($field['nid']);
    if ($referenced_node->uid != $node->uid) {
      $node->$field_name[$i] = NULL;
    }
  }  
}