<?php
 require_once 'app/Mage.php';
umask(0);
 ini_set("memory_limit","1024M");
//$_SERVER['SERVER_PORT']='443';
Mage::app();
$profileId = 7; //put your profile id here

$logFileName= "import.log";
$recordCount = 0;
// This won't work if Logging settings is disabled
// To activate it go to System->Configuration->Developer
Mage::log("Import Started",null,$logFileName);
$profile = Mage::getModel('dataflow/profile');

$userModel = Mage::getModel('admin/user');
$userModel->setUserId(0);
Mage::getSingleton('admin/session')->setUser($userModel);

if ($profileId) {
	$profile->load($profileId);
	if (!$profile->getId()) {
		Mage::getSingleton('adminhtml/session')->addError('The profile you are trying to save no longer exists');
	}
}

Mage::register('current_convert_profile', $profile);

$profile->run();

$batchModel = Mage::getSingleton('dataflow/batch');
if ($batchModel->getId()) {
	if ($batchModel->getAdapter()) {
		$batchId = $batchModel->getId();
		$batchImportModel = $batchModel->getBatchImportModel();
		$importIds = $batchImportModel->getIdCollection();
		$batchModel = Mage::getModel('dataflow/batch')->load($batchId);
		$adapter = Mage::getModel($batchModel->getAdapter());
		foreach ($importIds as $importId) {
			$recordCount++;
			try{
				$batchImportModel->load($importId);
				if (!$batchImportModel->getId()) {
					$errors[] = Mage::helper('dataflow')->__('Skip undefined row');
					continue;
				}

				$importData = $batchImportModel->getBatchData();
				try {
					$adapter->saveRow($importData);
				} catch (Exception $e) {
					Mage::log($e->getMessage(),null,$logFileName);
					continue;
				}

				if ($recordCount%20 == 0) {
					Mage::log($recordCount . ' - Completed!!',null,$logFileName);
				}
			} catch(Exception $ex) {
				Mage::log('Record# ' . $recordCount . ' - SKU = ' . $importData['sku']. ' - Error - ' . $ex->getMessage(),null,$logFileName);
			}
		}
		foreach ($profile->getExceptions() as $e) {
			Mage::log($e->getMessage(),null,$logFileName);
		}

	}
}

Mage::log("Import Completed",null,$logFileName);

// Catalog Rewrites
try {
	Mage :: getSingleton( 'catalog/url' ) -> refreshRewrites();
}
catch ( Exception $e ) {
	Mage::log($e -> getMessage(),null,$logFileName);
}
// LAYERED NAV
    try {
        $flag = Mage::getModel('catalogindex/catalog_index_flag')->loadSelf();
        if ($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();
        Mage::log('Layered Navigation Indices were refreshed successfully', null, $logFileName);
    }
    catch (Mage_Core_Exception $e) {
        Mage::log($e -> getMessage(). "\n",null,$logFileName);
    }
    catch (Exception $e) {
        Mage::log('Error while refreshed Layered Navigation Indices. Please try again later', null,$logFileName);
    }
 ?>

Add Product's Images using Magento API

<?php
// API Configuration
		
		$this->APIUrl= "http://yourdomain.com/index.php/api/soap/?wsdl";
		$this->APIUser="APIUser";
		$this->APIKey= "APIKey";
function addAPIImages($product_id){
	$sql ="SELECT * FROM YourDatabaseTable WHERE ProductID = $product_id";
	$resultat=mysql_query($sql) or die('SQL error:'.mysql_error());
	while ($row  = mysql_fetch_array($resultat)) {
		$imageURL = $row['ImageURL'];
		$proxy = new SoapClient($this->APIUrl);
		$sessionId = $proxy->login($this->APIUser, $this->APIKey);
		
		$newImage = array(
		'file' => array(
		'content' => base64_encode(file_get_contents($imageURL)),
		'mime'    => 'image/jpeg'
		),
		'label'    => $row['ProductName'],
		'position' => 1,
		'types'    => array('image','small_image','thumbnail'),
		'exclude'  => 0
		);
		try {
		$imageFilename = $proxy->call($sessionId, 'product_media.create', array($product_id, $newImage));
		} catch ( SoapFault $e ) {
			echo $e->getMessage ();
			continue;
		}
	}
}

?>

Retrieve Product's info using API:

<?php
// Check product's status. 
function getProductInfo($product_id){

	        $this->APIUrl= "http://yourdomain.com/index.php/api/soap/?wsdl";
		$this->APIUser="APIUser";
		$this->APIKey= "APIKey";
                $proxy = new SoapClient($this->APIUrl);
		$sessionId = $proxy->login($this->APIUser, $this->APIKey);
	       $exists = true;
	try {
		$info = $proxy->call($sessionId, 'product.info', $product_id);
	} catch (SoapFault  $e){
		$exists= false;
	}
	return $exists;
}

<?php
// Update Product's Info
function updateProductInfo(){

	        $this->APIUrl= "http://yourdomain.com/index.php/api/soap/?wsdl";
		$this->APIUser="APIUser";
		$this->APIKey= "APIKey";
                $proxy = new SoapClient($this->APIUrl);
		$sessionId = $proxy->login($this->APIUser, $this->APIKey);
	$filters = array(
	'sku' => array('like'=>'somesku%')
	);
	try {
		$products = $proxy->call($sessionId, 'product.list', array($filters));
                $numProducts = sizeof($products);
		for($i=0;  $icall($sessionId, 'product.update',array($products[$i]['sku'], array('name'=>$new_product_name, 'meta_keyword'=>$new_meta_keyword,'meta_description'=>$new_meta_description,'meta_title'=>$new_meta_title)));
		}
	} catch (SoapFault  $e){
		echo $e->getMessage();
	}
	return true;
}