Question

What happens to a php script which goes like this?

class FooException extends Exception
{

    public function __construct() {
        throw new FooException;
    }
}

It’s probably same as

while (TRUE) {
    new Exception();
}

It simply time outs when execution time is exceeded, or fails with some fatal error?

Answer 1

In the first case nothing happens, because you never construct the exception.

In the second case the exception is not thrown so you just get an ordinary infinite loop.

However if you modify the first example by adding this line at the end:

throw new FooException();

It causes an infinite loop which eventually consumes all the memory:

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 44 bytes)