How to add custom words behind product price - opencart

Question

I am trying to figure out how to add "Per Square Feet" behind the Product Price. It should be only applied to selected products - not to all. Any help is appreciated.
This is the screenshot for reference

Answer 1

Thank you for the photo it helped a lot. I suggest adding this into vqmod/vqcache. For more information on VQmod look here: https://code.google.com/p/vqmod/. If not you can just take the HTML, PHP, and Query code and put it directly in your core files.
View:
<file name="catalog/view/theme/*/template/product/product.tpl"> // where it will insert the below code
<operation>
<search position="before"><![CDATA[<?php if ($tax) { ?>]]></search> // this places your code before the code in the CDATA[....what ever is here....]
<add><![CDATA[ // the below code is what you are adding
<?php if isset($pricePerSqFt) { ?>
<p><?php echo $pricePerSqFt; ?></p>]]></add>
</operation>
</file>
Controller:
$this->load->model('catalog/product');
$this->data['pricePerSqFt'] = $this->model_catalog_product->getData();
Model:
<file name="catalog/model/catalog/product.php">
<operation>
<search position="after"><![CDATA[class ModelCatalogProduct extends Model {]]></search>
<add>
<![CDATA[
public function getData() {
$query = $this->db->query("SELECT what_data_you_want FROM table_name"); // will grab the data from database
if (isset($query)) {
return $query;
}else{
return NULL;
}
}
]]>
</add>
</operation>
</file>