Hierarchy of PHP exceptions

Published On2020-03-30

PHP is on its way to use more and more exceptions, and with PHP 8.0 throwing \TypeError and \ValueError exceptions, you will be seeing lots of exceptions working with modern PHP!

Here is a quick chart to help you take an overview look at the Exceptions used in PHP versions:

  ├── Error
  │     ├── ArithmeticError
  │     │       └── DivisionByZeroError
  │     ├── AssertionError
  │     ├── CompileError
  │     │       └── ParseError
  │     ├── TypeError
  │     │   └── ArgumentCountError
  │     ├── ValueError
  │     ├── UnhandledMatchError
  |     ├── FiberError
  |     └── Random\RandomError
  │             └── BrokenRandomEngineError
  └── Exception
        ├── ClosedGeneratorException
        ├── DOMException
        ├── ErrorException
        ├── IntlException
        ├── JsonException
        ├── LogicException
        │       ├── BadFunctionCallException
        │       │        └── BadMethodCallException
        │       ├── DomainException
        │       ├── InvalidArgumentException
        │       ├── LengthException
        │       └── OutOfRangeException
        ├── PharException
        ├── ReflectionException
        ├── RuntimeException
        │       ├── OutOfBoundsException
        │       ├── OverflowException
        │       ├── PDOException
        │       ├── RangeException
        │       ├── UnderflowException
        │       ├── UnexpectedValueException
        │       └── PDOException
        ├── SodiumException
        ├── FiberExit
        └── Random\RandomException


  • All of these exceptions are in the global namespace.
  • \SodiumException is from the sodium extension.
  • \PDOException is from the pdo extension.
  • \RandomException and RandomError are from the Random extension added in PHP 8.2.
  • The list is not exhaustive. Additional extensions might add more exceptions, but you can catch them all by catching \Throwable, or by the more specific \Error or \Exception classes.


PHP 8.0
PHP 8.1
PHP 8.2

Recent Articles on PHP.Watch

All ArticlesFeed 
All the Easter Eggs in PHP

All the Easter Eggs in PHP

A trip down the memory with PHP's Easter Eggs over the years
Laragon: Simple, Flexible, and Modern Development Server Environment for Windows

Laragon: Simple, Flexible, and Modern Development Server Environment for Windows

Laragon is a modern, simple, and flexible Windows Development Environment that provides support for multiple PHP, Apache, and MySQL versions, with quick HTTPS setup, Quick-app templates, Composer, npm, and more
Testing Randomness of PHP Random Number Functions

Testing Randomness of PHP Random Number Functions

Visualizing and testing various Random Number Generators available in PHP.
Subscribe to PHP.Watch newsletter for monthly updates

You will receive an email on last Wednesday of every month and on major PHP releases with new articles related to PHP, upcoming changes, new features and what's changing in the language. No marketing emails, no selling of your contacts, no click-tracking, and one-click instant unsubscribe from any email you receive.