How to copy one quote (only cart items) to other quote (only items ) in magento

$quoteA = Mage::getModel('sales/quote')->load($quoteId);
$quoteB = Mage::getModel('sales/quote')->load($userQuoteId);
$quoteB->merge($quoteA);
$quoteA->delete();
$quoteA->collectTotals()->save();
$quoteB->collectTotals()->save();

How do I add to wishlist programatically in magento 1.9?

$wishlist = Mage::getModel('wishlist/wishlist')->loadByCustomer($customerId, true);
$product = Mage::getModel('catalog/product')->load($productId);

$buyRequest = new Varien_Object(array()); // any possible options that are configurable and you want to save with the product

$result = $wishlist->addNewItem($product, $buyRequest);
$wishlist->save();

How to get (cart) items programatically shows duplicate SKUs for both the configurable and simple product in magento

As you have using getAllItems() then on for loop you need to check is it has parent item $item->getParentItemId().

foreach ($cart->getAllItems() as $item) {
    / * add this */
    if ($item->getParentItemId()) {
        continue;
    }
........
}

Check the customer password field Magento 1.9

    $email='test@gmail.com';
    $customer =Mage::getModel('customer/customer')
    ->setWebsiteId(Mage::app()->getStore()
    ->getWebsiteId())
    ->loadByEmail($email);
    $hash= $customer->getPasswordHash();

    Mage::helper('core')->validateHash($currentpassword, $hash);

Get product from save event observer - Magento 2

Get product from save event observer - Magento 2

If you want to $productobj after saving product from backend then you can easily use catalog_product_save_after event.
I am assuming that you already know how to create a module in M2.
Put this events.xml in below path
app\code\YOUR_NAMESPACE\YOURMODULE\etc\adminhtml
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="catalog_product_save_after">
        <observer name="test_name" instance="YOUR_NAMESPACE\YOUR_MODULENAME\Observer\Productsaveafter" />
    </event>
</config>

And put your Productsaveafter.php in below path
app\code\YOUR_NAMESPACE\YOURMODULE\Observer\


<?php

namespace YOURNAMESPACE\YOURMODULENAME\Observer;

use Magento\Framework\Event\ObserverInterface;

class Productsaveafter implements ObserverInterface
{   
    public function execute(\Magento\Framework\Event\Observer $observer)
    {
        $_product = $observer->getProduct();  // you will get product object
        $_sku=$_product->getSku(); // for sku

    }  
}

How to search for product by name or sku with PageSize and CurPage programatically magento 1.9?

How to search for product by name or sku with PageSize and CurPage programatically magento 1.9?
$products = Mage::getModel('catalog/product')
                    ->getCollection()
                    ->addAttributeToFilter(
                        array(
                            array('attribute' => 'sku', 'like' => '%'.$search.'%'),
                            array('attribute' => 'name', 'like' => '%'.$search.'%')
                        )
                    )
                    ->setPageSize(10)->setCurPage(1)->load();

How to get instagram feed in custom page in magento

<?php
$fields = array(
'client_id' => "bdb4fd62e6e24f938fb7d124acf80187",
'client_secret' => "1cca64ded0e046118b311fdc001bb52c",
'grant_type' => "authorization_code",
'redirect_uri' => "http://wgi-mobile-dev-949798541.ap-south-1.elb.amazonaws.com/insta.php",
//'code' => $_GET['code'],
);
//1484074220.1677ed0.af32987ae8984bb59d9803afabc83e65
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.instagram.com/v1/users/self/media/recent/?access_token=1484074220.1677ed0.af32987ae8984bb59d9803afabc83e65');
curl_setopt($ch, CURLOPT_POST, false);
//curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
//curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
$posts = curl_exec($ch);
curl_close($ch);
$posts = json_decode($posts);

if ($posts) {
foreach ($posts->data as $dat) {
echo '<img src="' . $dat->images->standard_resolution->url . '" style="width:250px;height:200px;">';
}
}
?>

instagram access token generator :- https://instagram.pixelunion.net/