Magento index Neuaufbau per script (Rebuilding Index Programmatically)

function rebuildIndexes(){
    $processes = array();
    $collection = Mage::getSingleton('index/indexer')->getProcessesCollection();
    foreach ($collection as $process) {
        try {
            $process->reindexEverything();
            echo($process->getIndexer()->getName() . " index was rebuilt successfully"."\n");
        } catch (Mage_Core_Exception $e) {
            echo($e->getMessage());
        } catch (Exception $e) {
            echo($process->getIndexer()->getName() . " index process unknown error:\n" . $e ."\n");
        }
    }
}

public function rebuildIndexes(){
    $processes = array();
    $collection = Mage::getSingleton('index/indexer')->getProcessesCollection();
    foreach ($collection as $process) {
        try {
            $process->reindexEverything();
            $this->_message($process->getIndexer()->getName() . " index was rebuilt successfully");
        } catch (Mage_Core_Exception $e) {
            $this->_throwException($e->getMessage());
        } catch (Exception $e) {
            $this->_throwException($process->getIndexer()->getName() . " index process unknown error:\n" . $e);
        }
    }
}

Mage::getSingleton('catalog/index')->rebuild();
Mage::getResourceModel('catalog/product_flat_indexer')->rebuild();
Mage::getSingleton('catalog/url')->refreshRewrites();
Mage::getModel('catalog/product_image')->clearCache();
Mage::getSingleton('catalogsearch/fulltext')->rebuildIndex();
Mage::getSingleton('cataloginventory/stock_status')->rebuild();
$flag = Mage::getModel('catalogindex/catalog_index_flag')->loadSelf();
if ($flag->getState() == Mage_CatalogIndex_Model_Catalog_Index_Flag::STATE_RUNNING) {
    $kill = Mage::getModel('catalogindex/catalog_index_kill_flag')->loadSelf();
    $kill->setFlagData($flag->getFlagData())->save();
}
$flag->setState(Mage_CatalogIndex_Model_Catalog_Index_Flag::STATE_QUEUED)->save();
Mage::getSingleton('catalogindex/indexer')->plainReindex();