Welcome to FindNerd. We are going to discuss the Exception,what is it and how we can use it in php? First question araised that what is Exception? Exception is nothing but a runtime error. It depends totally upon the values passing at run time. We can take an example of division. In division we try to divide any number with zero then we need to throw the Exception division by zero. Please have a look.

<?php
function divisionOpt($num1,$num2)
{
if(!$num2 || $num2==0)
{
throw new Exception('Division by zero');
}
return $num1/$num2;
}
try
{
echo divisionOpt(55,6);
echo divisionOpt(44,0);
}
catch(Exception $e)
{
echo 'Exception:' . $e->getMessage();
}
?>
result: 9.1666
Exception: Division by zero

In above example we build an function for division and called this function twice with different arguments. In second call, we passes zero as second argument. It will throw the exception Division by zero.