Access variable outside foreach loop PHP -

i'm new php. can tell me how access foreach loop variable outside foreach. please find below code.

  <?php  $categories = mage::getmodel('catalog/category')->getcollection()->addattributetoselect('*');           foreach ($categories $category):           $categorysize = $category->getsize_chart();           print_r ($categorysize);           endforeach;     ?> 

i need in following html img tag's src attribute.

<div class="sizechat"><p>close</p><div class="padd"><img src="<?php echo mage::getbaseurl('media').'catalog/category/'.$categorysize ?>"></div></div> 

first define variable above of loop

$categorysize = array();  <?php  $categories = mage::getmodel('catalog/category')->getcollection()->addattributetoselect('*');           foreach ($categories $category):           $categorysize = $category->getsize_chart();           print_r ($categorysize);           endforeach;     ?>  print_r($categorysize) //now can outside loop