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==Nested function==



   
  <!-- start source code -->
   
    <source lang="html4strict">

<?php
   function salestax($price,$tax) {
      function convert_pound($dollars, $conversion=1.6) {
         return $dollars * $conversion;
      }
      $total = $price + ($price * $tax);
      echo "Total cost in dollars: $total. Cost in British pounds: ".convert_pound($total);
   }
salestax(15.00,.075);
echo convert_pound(15);
?>
           
       </source>