Check Delivery Availability by Zip/Pin Code

First create a module by any name

My module name = products

Database = magento1

Table = products

Path = D:\xampp\htdocs\magento1\app\design\frontend\rwd\default\template\products\products.phtml 

  Code:  

 

<div class="pincode-check">

  <p class="pincode-title">Check Cash on delivery availability</p></div>
    <input type="text" name="pin" id="pin-input" placeholder ="Enter your pincode" /><br>
    <button id="submit-pin">Check</button>
    <p id="message"></p>
</div>

<!-- Ajax Block-->
    <script type="text/javascript">
        var pincodeValue = $j( "#pin-input" ).val();
        $j( "#submit-pin" ).click(function(){
            pincodeValue = $j( "#pin-input" ).val();
            $j('#message').hide();
            // alert(pincodeValue);
            $j.ajax({
                url: "<?php echo $this->getUrl('products/index/pincode') ?>",
                type: "POST",
                data: {
                pincodeValue:pincodeValue,},
            success: function(data) {
                $j('#message').show();
                $j('#message').html(data);
                },
            error: function(MLHttpRequest, textStatus, errorThrown){
                alert(errorThrown);
                }
            });  
        });      
    </script>

Path = D:\xampp\htdocs\magento1\app\design\frontend\rwd\default\layout\products.xml

 Code: 

<?xml version="1.0"?>
<layout version="0.1.0">
    <default>
    </default>
    <products_index_index>
        <reference name="content">
            <block type="products/products" name="products" template="products/products.phtml" />
        </reference>
    </products_index_index>
    <catalog_product_view>
    <reference name="product.info">
        <block type="catalog/product_view" name="product.info.addtocart" as="addtocart" template="catalog/product/view/addtocart.phtml">
         <block type="products/products" name="products"  template="products/catalog/product/view/products.phtml"/>
         </block>
    </reference>   
</catalog_product_view>
</layout> 

Controller

Path =D:\xampp\htdocs\magento1\app\code\local\Bluethink\Products\controllers\IndexController.php

Code:

<?php
class Bluethink_Products_IndexController extends Mage_Core_Controller_Front_Action
{
    public function indexAction()
    {
       
          
        $this->loadLayout();    
        $this->renderLayout();
    }
    public function pincodeAction()
    {
        $pinCode=$_POST['pincodeValue']; // pincode entered by the user

       
        if (!preg_match("/^\d{6}$/i",$pinCode)){
           
            $result="Please enter a valid pincode.";
        }
        else{
        
            $model = Mage::getModel('products/products')->getCollection()->addFieldToFilter('pincode', $pinCode);
            // echo "<pre>";
            // print_r($model->getData());
            // $model->printLogQuery(true);
            // exit;
            if(empty($model->getData())){
                $result="COD not available";
            }else{
                $result="COD available";
            }

        }

        $this->getResponse()->setBody($result);
    }
        // $this->loadLayout();    
        // $this->renderLayout();
   
}

When you open your module by {127.0.0.1/magento/(Module name)}

 

My url =  {http://127.0.0.1:500/magento1/products}  

Create Database with pincode and add values to check as mine 

shown in pic  below 

If you want to call in product and check there

  

 You have to create a folder inside products in template 

catalog\product\view\products.phtml (copy product.phtml there)                        

  (make these folder inside template )  see  path in pic

When you open this in magento it shows like this

When you open it in products it shows like this by overriding it there

I have it will helps if any problem comes you may comment us