Mastering PHP 7

Uncaught Exception handler

PHP provides a mechanism in the form of a set_exception_handler function that allows us to define a custom handler function for all uncaught throwables, including exceptions. The set_exception_handler function accepts a single callable parameter--either a function name passed as string, or an entire anonymous function.

Let's take a look at the following function name passed as string example:

    <?php    function throwableHandler(Throwable $t)    {      echo 'Throwable Handler: ' . $t->getMessage();    }    set_exception_handler('throwableHandler');    echo 'start';      throw new Exception('Ups!');    echo 'end';

Let's take a look at the following anonymous function example:

    <?php    set_exception_handler(function (Throwable $t) { echo 'Throwable ...