Magento – Get stock quantity of simple product of configurable products

Hi Forks, Today i am writing this post to how to get stock qty of simple product in configurable product page in Magento. There is 2 way to develop the module or simple customization. I did it in simple way, please have at look below code:

Code :

<?php if ($_product->isAvailable()): ?>
	<p class="availability in-stock"> <?php echo $this->__('Availability: ') ?>
		<span>
		<?php if($_product->getTypeId() == "configurable"):
		$conf = Mage::getModel('catalog/product_type_configurable')->setProduct($_product);
		$simple_collection = $conf->getUsedProductCollection()->addAttributeToSelect('*')->addFilterByRequiredOptions();
		foreach($simple_collection as $simple_product) {
			$size = nl2br($simple_product->getResource()->getAttribute('size')->getFrontend()->getValue($simple_product));
			echo "<span class='simple-stock' id='size".$size."'>". Mage::getModel('cataloginventory/stock_item')->loadByProduct($simple_product)->getStockQty()."</span>";
		}		
		else:
			echo (int)Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product)->getQty();
		endif; ?>
		In stock</span></p>
<?php else: ?>
	<p class="availability out-of-stock"><?php echo $this->__('Availability:') ?> <span><?php echo $this->__('<i class="fa fa-times-circle"></i> Out of stock') ?></span></p>
<?php endif; ?>

<script type="text/javascript">
jQuery(document).ready(function(){			
	$("#product-options-wrapper select").change(function() {
		var id = $(this).find(":selected").text();
		var sizevalue = "#size"+id;
		//console.log(sizevalue);
		$(".simple-stock").css("display", "none");
		$(sizevalue).css("display", "inline-block");
	});
});
</script>