the following is an example of a re-thrown exception and the using of getPrevious function:

<?php

$name = "Name";

//check if the name contains only letters, and does not contain the word name

try
   {
   try
     {
      if (preg_match('/[^a-z]/i', $name)) 
       {
           throw new Exception("$name contains character other than a-z A-Z");
       }   
       if(strpos(strtolower($name), 'name') !== FALSE)
       {
          throw new Exception("$name contains the word name");
       }
       echo "The Name is valid";
     }
   catch(Exception $e)
     {
     throw new Exception("insert name again",0,$e);
     }
   }
 
catch (Exception $e)
   {
   if ($e->getPrevious())
   {
    echo "The Previous Exception is: ".$e->getPrevious()->getMessage()."<br/>";
   }
   echo "The Exception is: ".$e->getMessage()."<br/>";
   }

 ?>