Re: Smarty: Modifiers and &$smarty

I found this message on php-general list, and I'm cross-posting the reply to Smarty list. I see a couple of issues with passing Smarty object to modifiers. 1. You want to use _current_file and _current_lineno member variables, but they are only defined in Smarty_Compiler class, and what actually runs the modifiers is Smarty class. Check Smarty::_run_mod_handler(). 2. The only reasonable way to make Smarty object available to modifiers is to pass it as a last parameter. However, you run into problems when your modifier has default parameters. For example: function x_mod($arg1, $arg2 = 5, &$smarty) { ... } If you call modifier as {$foo|x}, $arg2 would actually point to the Smarty object, and you will get a notice complaining about $smarty parameter not being passed. So, it would not be possible to use default parameters for modifiers which is a big step back IMO. Can you provide alternative ideas? > Hi, > > is there a way to access the calling smarty object from withing a > modifier callback function? > > Regular smarty callback functions get passed a list of "parameters" of > the function call as a first argument and a reference to the calling > smarty object as a second argument. > > function my_smary_func($params, &$smarty) { > ... > > if (my_smarty_check_params($params, $allowed)) { > return true; > } > > $smarty->assign(); > ... > } > > > That way you can not only modify the smarty object but access properties > of the object. Two of them help me to generate error messages: > $smarty->_current_line_no and $smarty->_current_file (btw. one should > "make them public"). > > function my_smarty_check_params($params, $allowed, &$smarty) { > .... > if (...) { > return sprintf("Error on %s %d", $smarty->_current_file, ...); > } > ... > } > > Can I do something similar with modifiers, which seem to have this > format. Is there a way to access the calling smarty object? > > function my_smarty_modifier($value, $option = '', ...) { > ??? $smarty->... ??? > } -Andrei When we eliminate the impossible, whatever remains, however improbable, must be true. -- Sherlock Holmes