DisallowThrowRule.md

DisallowThrowRule

Forbid the use of throw

When you throw an exception in PHP, you effectively perform a GOTO: your position in the program's execution jumps to the appropriate exception handler, and execution continues. This is fine, but it obviously means that your original function has a side-effect: calling it will fundamentally alter the program flow.

Fail

<?php

function throwAnError(): void
{
    throw new Exception('some error message');
}

Rule configuration

The rule is enabled by default. To turn it off, edit your phpstan.neon file.

parameters:

  phpstanFunctionalProgramming:
    disallowThrow: false