PHP program to create a user-defined exception class

Program/Source Code:

The source code to create a user-defined exception class is given below. The given program is compiled and executed successfully.

<?php
// PHP program to demonstrate the user-defined exception.
class UserException extends Exception
{
}

try
{
    $exp = new UserException("User defined exception");
    throw $exp;
}
catch(UserException $e)
{
    printf("Exception: %s", $e->getMessage());
}
?>

Output:

Exception: User defined exception

Explanation:

Here, we created a class UserException by inheriting a predefined class Exception.

try 
{  
    $exp = new UserException("User defined exception"); 
    throw $exp;
}  

Here, we created the object of UserException class and throw an exception using throw that will be caught by the catch block and print a specified message on the webpage.