Re: print_r unaware of object's read_property handler

antony@zend.com (Antony Dovgal) wrote: > > Ok, show me in a pseudo-code how are you going to clap with only one hand, i.e. to use > read_property() without knowing the property name. This is impossible, and it's not my point. I do not use read_property hook for voodoo "guessmyname" functionality. I use it to return zval for property with name X. This is the approach of read_property right? > This is how it works atm: > > print_r(object) > { > properties = object->get_properties(); > > while(properties) { > print *properties; > properties++; > } > } Is get_properties hook designed to return properties names with values? Or names are enough to read property with read_property hook which knows the name returned by get_properties? > You insist on implementing it like this: > > print_r(object) > { > property = object->read_property(<PROPERTY_NAME_TAKEN_DIRECTLY_FROM_YOUR_BRAIN>); > print property; > } No. I expect clarification why: print_r(object) { property = zend_hash_find print property; } is better than print_r(object) { property = object.read_property(property_name_returned_from_get_properties); print property; } > If you need to get only names of the properties, you can use keys of the hash returned by > get_properties(). > But returning only keys without the values does not make any sense, since it would require > implementing and calling BOTH get_properties() > AND read_property(), and the latter would be called for each property, adding a slowdown. You want to tell me that it's better implementing get_properties which updates hash table ( keys and values ) and do not define read_property hook? > > If yes, why print_r doesn't read property value using read_property hook, even if I > > add own get_properties hook which > > returns all properties names? > > Because get_properties() returns both names and values of the properties, we don't need to > call read_property(), > we already have the value in the has returned from get_properties(). So get_properties and write_property hook should be enough? > > Yes, of course I can implement get_properties hook that way so it can updates > > object's properties hash. > > But my question is: do I need such functionality if my read_property ( and write ) hook > > doesn't need object's properties hash? > > Don't use it if you don't need it. Yes, but print_r prints only property names then :) > > Or better , do I need to duplicate every property's value in hash table because > > print_r doesn't use my read_property handler? > > "Duplicate every property's value"? > Have you ever heard of functions and code reuse? <only_joke> Have you ever heard about specs and docs? </only_joke> > > Obvious answer is that such hook must update object's properties hash. > > But why, if the only one purpose is print_r and var_dump functions? > > $object->property = "new value"; This is done in write_property hook. That's why I askded above if write_property and get_properties hooks are enough. > > And I think the last question: > > When and why object's read_property hook is ignored? > > I don't think you really expect me to go over the sources and explain every internal > function to you, do you? "Those who know don't talk. Those who talk don't know." I will add my own "Those who do not know, ask". So I think I am at correct list. Piotras