Reddit.com: When do you throw exceptions?

On Reddit.com there's a discussion that's started up around when to throw exceptions in your PHP applications. The poster asks:

When and where do you throw exceptions? Is it just on database connections? Is it whenever you run a query? Send an email? I'm just curious what the best situations are to throw exceptions and possibly improve my code.

There's a good number of replies so far, some a bit more vague than others:

• "In exceptional circumstances."
  
• "You throw an except when you can't sensibly handle what has just happened."
  
• "Fatals for compile-time errors, Exceptions for run-time errors"
  
• "I throw an exception any time the function being called is either not capable of continuing or it is not going to return the expected results."
  
• "Exceptions everywhere is not a good thing."
  

Check out more suggestions and comments in the full post.

Link: http://www.reddit.com/r/PHP/comments/1mr1qa/when_do_you_throw_exceptions