Exceptions

An exception is an event that occurs during the runtime of a program, and that disrupts its normal flow.

Starting with version 7, PHP changed the way in which errors are reported. Unlike the traditional error reporting mechanism used in PHP 5, in version 7, PHP uses an object-oriented approach to deal with errors. Consequently, many errors are now thrown as exceptions.

The exception model in PHP (supported since version 5) is similar to other programming languages. Therefore, when an error occurs, it is transformed into an object – the exception object – that contains relevant information about the error and the location where it was triggered. We can throw and catch exceptions in a PHP script. When the exception is thrown, it is handed to the runtime system, which will try to find a place in the script where the exception can be handled. This place that is looked for is called the exception handler, and it will be searched for in the list of functions...