Delete all nodes of a content type in Drupal 6

Delete all nodes of a content type in Drupal 6

<?php
// See this thread for more info: http://drupal.org/node/92861
// Display our form
// Bumping up ex time to 5 minutes
ignore_user_abort(true);
ini_set('max_execution_time', 600);
set_time_limit(0);

print "<p>Note that it may take several minutes if you are deleting a lot of nodes.</p>";
//Useful hack for quick and dirty pseudo-module.
// combo of print and drupal_get_form; paste code into wysiwyg with php formatting.
print drupal_get_form('form_del_all_by_node_type');

// Our form for deleteing nodes of given type
function form_del_all_by_node_type()
{
    $form['node_type'] = array(
        '#type' => 'textfield',
        '#title' => t('Content Type to delete:'),
        '#description' => t('Enter the type of content to delete. This must be the exact content name used in the database.'),
    );
    $form['submit'] = array(
        '#type' => 'submit',
        '#value' => t('Delete now'),
    );
    $form['#attributes'] = array(
        'enctype' => 'multipart/form-data',
        'id' => 'form_del_all_by_node_type',
    );
    return $form;
}

// We do no validation
function form_del_all_by_node_type_validate($form_id, $form_values)
{
    // left blank
}

function form_del_all_by_node_type_submit($form_id, $form_values)
{
    $node_type = $form_values['values']['node_type'];
    $total_node_count = isset($form_values['values']['total_node_count'])
        ? $form_values['values']['total_node_count']
        : _get_total_node_count($node_type);
    batch_delete_process($node_type , $total_node_count);
}

function batch_delete_process($node_type,$total_node_count)
{
    // For this example, we decide that we can safely process
    // 100 nodes at a time without a timeout.
    $limit = 100;
    $total = _get_total_node_count($node_type);

    // With each pass through the callback, retrieve the next group of nids.
    $query = "SELECT n.nid FROM newsmachine_node n WHERE n.type = '" . $node_type . "' limit " . $limit;
    $aquery = db_query($query);
    if( $total > 0 ){
        while ($n = db_fetch_object($aquery)) {
            // Here we actually perform our processing on the current node.
            node_delete($n->nid);
        }
        if( $total > $limit ){
            sleep(3);
            $form_state['values']['node_type'] = $node_type;
            $form_state['values']['total_node_count'] = $total_node_count;
            $message =  'Processing...';
            //$message .= theme('item_list', $results);  // D6 syntax
            drupal_set_message($message);
            drupal_execute('form_del_all_by_node_type', $form_state);
        } else {
            // Here we do something meaningful with the results.
            $message =  $total_node_count.' deleted.';
            //$message .= theme('item_list', $results);  // D6 syntax
            drupal_set_message($message);
        }
    } else {
        drupal_set_message(t("There were no nodes of type ".$node_type." found."));
    }
}

function _get_total_node_count($node_type = null)
{
    $query = "SELECT count(*) as total FROM newsmachine_node WHERE type = '" . $node_type . "'";
    return db_result(db_query($query));
}

Copy and paste into Drupal wysiwyg with PHP as text format.