Magento validator for configuration text field

Add following class in your system.xml. review following image.

Magento Category Accordian with Alphabatically sorting.

Add following code in any PHTML file and call in left/right side.

<div class="block block-left-nav" id="sidebox">
    <div class="block-title">
        <strong><span><?php echo $this->__('categories') ?></span></strong>
    </div>
    <div class="block-content">
        <ul id="nav-left">
            <?php
            $collection = Mage::getModel('catalog/category')->getCollection()
                    ->addAttributeToSelect('*')
                    ->addAttributeToSelect('is_active')
                    ->addAttributeToSort('name', 'ASC');
            foreach ($collection as $_category1):
                if ($this->getRequest()->getModuleName() == 'vendor') {
                    $_category = Mage::getModel('catalog/category')->load($_category1['entity_id']);
                    ?>
                    <?php if ($_category->getIsActive() && $_category1['entity_id'] != 2 && $_category->getLevel() == 2) { ?>
                        <?php $potential = $_category->hasChildren(); ?>
                        <li><a id="block-title" class="<?php echo ($open) ? 'active' : 'inactive' ?>" href="<?php
                            if ($potential) {
                                echo $this->getCategoryUrl($_category);
                                //echo 'javascript:void(0)';
                            } else {
                                echo $this->getCategoryUrl($_category);
                            }
                            ?> "><?php echo $_category->getName(); ?></a>
                               <?php if ($potential) { ?>
                                <ul class="top-level">
                                    <?php
                                    $_cat_level_2 = array();
                                    foreach ($_category->getChildrenCategories() as $_category2) {
                                        $_cat_level_2[$_category2->getName()] = $_category2;
                                    }
                                    ksort($_cat_level_2);
                                    ?>
                                    <?php foreach ($_cat_level_2 as $subcategory): ?>
                                        <li class="second-category">
                                            <a  class="<?php echo ($open) ? 'active' : '' ?>" href="<?php echo $this->getCategoryUrl($subcategory); ?>"><?php echo $subcategory->getName(); ?></a>
                                            <?php if ($potential) { ?>
                                                <ul class="sub-level">
                                                    <?php
                                                    $_cat_level_3 = array();
                                                    foreach ($subcategory->getChildrenCategories() as $_category3) {
                                                        $_cat_level_3[$_category3->getName()] = $_category3;
                                                    }
                                                    ksort($_cat_level_3);
                                                    ?>
                                                    <?php foreach ($_cat_level_3 as $subsubcategory): ?>
                                                        <li><a class="<?php echo ($open) ? 'active' : '' ?>" href="<?php echo $this->getCategoryUrl($subsubcategory); ?>"><?php echo $subsubcategory->getName(); ?></a></li>
                                                    <?php endforeach; ?>
                                                </ul>
                                            <?php } ?>  
                                        </li>
                                    <?php endforeach; ?>
                                </ul>
                            <?php } ?>
                        </li>
                        <?php
                    }
                }
                else {
                    $_category = Mage::getModel('catalog/category')->load($_category1['entity_id']);
                    ?>
                    <?php if ($_category->getIsActive() && $_category1['entity_id'] != 2 && $_category->getLevel() == 2) { ?>
                        <?php
                        $open = $this->isCategoryActive($_category);
                        if (Mage::registry('current_category')->getid() == $_category1['entity_id']) {
                            $open = 'yes';
                        }
                        ?>
                        <?php $potential = $_category->hasChildren(); ?>
                        <li><a id="block-title" class="<?php echo ($open) ? 'active' : 'inactive' ?>" href="<?php
                            if ($open) {
                                echo $this->getCategoryUrl($_category);
                            } elseif ($potential) {
                                //echo 'javascript:void(0)';
                                echo $this->getCategoryUrl($_category);
                            } else {
                                echo $this->getCategoryUrl($_category);
                            }
                            ?> "><?php echo $_category->getName(); ?></a>
                               <?php if ($potential) { ?>
                                   <?php
                                   $_cat_level_2 = array();
                                   foreach ($_category->getChildrenCategories() as $_category2) {
                                       $_cat_level_2[$_category2->getName()] = $_category2;
                                   }
                                   ksort($_cat_level_2);
                                   ?>
                                <ul class="top-level">
                                    <?php foreach ($_cat_level_2 as $subcategory): ?>
                                        <?php
                                        $open = $this->isCategoryActive($subcategory);
                                        if (Mage::registry('current_category')->getid() == $subcategory->getId()) {
                                            $open = 'yes';
                                        }
                                        ?>
                    <?php $potential = $subcategory->hasChildren(); ?>
                                        <li class="second-category">
                                            <a  class="<?php echo ($open) ? 'active' : '' ?>" href="<?php echo $this->getCategoryUrl($subcategory); ?>"><?php echo $subcategory->getName(); ?></a>
                                                <?php if ($potential) { ?>
                                                <ul class="sub-level">
                                                    <?php
                                                    $_cat_level_3 = array();
                                                    foreach ($subcategory->getChildrenCategories() as $_category3) {
                                                        $_cat_level_3[$_category3->getName()] = $_category3;
                                                    }
                                                    ksort($_cat_level_3);
                                                    ?>
                                                    <?php foreach ($_cat_level_3 as $subsubcategory): ?>
                                                        <?php
                                                        $open = $this->isCategoryActive($subsubcategory);
                                                        if (Mage::registry('current_category')->getid() == $subsubcategory->getId()) {
                                                            $open = 'yes';
                                                        }
                                                        ?>
                                                        <li><a class="<?php echo ($open) ? 'active' : '' ?>" href="<?php echo $this->getCategoryUrl($subsubcategory); ?>"><?php echo $subsubcategory->getName(); ?></a></li>
                                                <?php endforeach; ?>
                                                </ul>
                                        <?php } ?>  
                                        </li>
                                <?php endforeach; ?>
                                </ul>
                        <?php } ?>
                        </li>
                    <?php }
                }
                ?>
<?php endforeach; ?>
        </ul>
    </div>
</div>

Magento: Display number of times a product has been sold in the Product Grid

To display how many time product is sold you have to create a rendered in product grid.
Add this code in your admin grid.

class Techtown_Adminx_Block_Adminhtml_Adminx_Renderer_Salesreturn extends Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract
{
    public function render(Varien_Object $row)
    {
        $productID =  $row->getId();
        $product = Mage::getModel('catalog/product')->load($productID);
       
        $sku = nl2br($product->getSku());
        //$to = $_product->getResource()->formatDate(time());
        //$from = $_product->getResource()->formatDate(time() - 60 * 60 * 24 * 1);
        $product = Mage::getResourceModel('reports/product_collection')
        ->addOrderedQty(true)
        ->addAttributeToFilter('sku', $sku)
        ->setOrder('ordered_qty', 'desc')
        ->getFirstItem();
        echo '<a href="#" class="adminx-sales-return-grid">'.(int)$product->ordered_qty.'</a>';
    }
}

Increase Admin session timeout in magento

To increase the session time in admin Go to

System => Configuration => Admin => Security => set Session Lifetime (seconds) : value as you want. ( like : 14000).

 Now  go to System => Configuration =>Web => Session Cookie Management => set Cookie Lifetime
 14000.

Magento Call Java script Function in XML Top links.

<reference name="top.links">
    <action method="addLink" translate="label title" module="smartproductfinder">
        <label>Smart Product Finder</label>
        <title>javascript:void(0)</title>
        <prepare/><aParams/>
        <position>10</position>
        <li/><a>data-reveal-id="myModal"</a>
    </action>
</reference>

Magento Display Dropdown For Quntity Box

In the addtocart.phtml file find the following code(line 33)

<input name="qty" type="text" class="input-text qty" id="qty" maxlength="12" value="<?php echo $this->getMinimalQty($_product) ?>" />

Replace with this code: 
This code shows the “Available Qty for Product”.

<select class="input-text qty" name="qty" id="qty">
  <?php $i = 1 ?>
  <?php do { ?>
    <option value="<?php echo $i?>">
      <?php echo $i?>
      <?php $i++ ?>
    </option>
<?php } while ($i <= (int)Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product)->getQty()) ?></select>

This code shows the “Maximum Qty Allowed in Shopping Cart”.

<select class="input-text qty" name="qty" id="qty">
    <?php $i = 1 ?>
    <?php do { ?>
        <option value="<?php echo $i ?>">
            <?php echo $i ?>
            <?php $i++ ?>
        </option>
    <?php } while ($i <= (int) Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product)->getMaxSaleQty()) ?>
</select>

Magento Add Date Filed In Admin Form

Step-1 Add the following code in app/code/local/YourNamespace/YourModule/Block/Adminhtml/Yourmodule/Edit/Tab/Form.php

$fieldset->addField('purchase_date', 'date', array(
    'label'     => Mage::helper('subscription')->__('Purchase Date'),                  
    'name'      => 'purchase_date',
    'image'     => $this->getSkinUrl('images/grid-cal.gif'),
    'format'    => Mage::app()->getLocale()->getDateFormat(Mage_Core_Model_Locale::FORMAT_TYPE_SHORT)
));

Step-2 Now the date field with a datepicker is displayed in your admin form. To save the value into database, you need to add a line of code in saveAction() function of app/code/local/YourNamespace/YourModule/controllers/YourModuleController.php

if ($data = $this->getRequest()->getPost()) {

$data = $this->_filterDates($data, array('purchase_date', 'expiry_date'));

$model = Mage::getModel('subscription/subscription');     
$model->setData($data)
      ->setId($this->getRequest()->getParam('id'));

Hope it helps. Thanks.