When would you throw a DomainException in PHP?

Question

I was going through the list of predefined Exceptions in PHP and I noticed the DomainException. Anyone know what does DomainException mean? Does it mean failed data model valida

Answer 1

This kind of exception should be used to inform about domain errors in mathematical sense.

See domain of a function.

For example, the square root function will only be defined for positive numbers (unless you're using complex numbers...)