Notice: Undefined offset: 4 while opening website

Question

Today When I run my store it says following error message..

Notice: Undefined offset: 4 in /var/www/vhosts/myhost.com/Myproject/app/design/frontend/tapestore/default/template/catalog/product/featured_list.phtml on line 171

The following code is found in that place...

166 <?php if ($desct) { ?>
167     <div class="product-grid-description">
168        <ul>
169        <?php
170             $i = 0;
171             while ($desctexpl[$i] && $i < 4) {
172                   echo "<li>" . Mage::helper('core/string')->truncate($desctexpl[$i], '40') . "</li>";
173                   $i++;
174             }
175         ?>
176         </ul>
177     </div>
178 <?php } ?>

Could any one suggest what might be the problem ? and how to solve it ?

Answer 1

Use below code:

166 <?php if ($desct) { ?>
167     <div class="product-grid-description">
168        <ul>
169        <?php
170             $i = 0;                   
171               while (array_key_exists($i,$desctexpl) && $i < 4) {
172                   echo "<li>" . Mage::helper('core/string')->truncate($desctexpl[$i], '40') . "</li>";
173                   $i++;
174               }                   
175         ?>
176         </ul>
177     </div>
178 <?php } ?>