Re: Execution order of PHP

On Wed, Mar 10, 2010 at 14:41, Bob McConnell <rvm@cbord.com> wrote: > From: Auke van Slooten > >> In a hobby project I'm relying on the order in which the following > piece >> of PHP code is executed: >> >> $client->system->multiCall( >>    $client->methodOne(), >>    $client->methodTwo() >> ); >> >> Currently PHP always resolves $client->system (and executes the __get > on >> $client) before resolving the arguments to the multiCall() method > call. >> >> Is this order something that is specified by PHP and so can be relied >> upon to stay the same in the future or is it just how it currently > works. >> >> If it cannot be relied upon to stay this way, I will have to rewrite > the >> multiCall method and API... > > Think about it from the parser's point of view. It has to evaluate > $client->system to determine the parameter list for multiCall(). Then it > has to evaluate those parameters before it can stuff their values into > the stack so it can call the function. That's not true. It's entirely possible making languages that are lazy evaluated. Haskell is an example of that. -- Daniel Egeberg