Re: How can I use a function's default arguments but change one of the end ones in the list?

On Thu, Feb 5, 2009 at 20:10, German Geek <geek.de@gmail.com> wrote: > I've thought about this problem before but couldn't think of a solution > either. How does func_get_args() solve this? You could make a wrapper > function without that. It's all in how it's used. Ironically, I don't remember saying that you couldn't make a wrapper function without it, or that it was required to make a wrapper. Thanks for clarifying that for everyone just in case. ;-P > How would u (php) know which parameter u mean in a particular case? You don't have to. You can send NULL or empty strings for that matter, and use the parameter position in func_get_args() that way. Or using hierarchy and preference: <?php if(func_num_args() == '2') { $first_param = func_get_args(1); $second_param = 'default_value'; $third_param = func_get_args(2); $fourth_param = 'another default here'; } ?> Though inelegant, it works. What would probably be better, though, would be to write the wrapper as I mentioned, but have it accept a single parameter as an array, like so: <?php function wrapper_func($arr) { // Define variable defaults $param_one = null; $param_two = 'apple'; $param_three = 'foo'; $param_four = 123.45; // Redefine variables with values passed to __FUNCTION__ foreach($arr as $k => $v) { $$k = $v; } // Call original function with these values and pass through the results. return orig_func($param_one,$param_two,$param_three,$param_four); } // Then use it like so: $params = array( 'param_two' => 'Orange', 'param_four' => 543.21, ); ?> If all orig_func() did was a simple foreach()/echo routine, it wrapper_func() would print: [NULL] Orange foo 543.21 > I think it would just be useful to have an IDE that can write out the > default parameters on a keyboard shortcut or mouse click and then u can > change them afterwards. It would be nice.... if every programmer touching the code had the same IDE. Unfortunately, it's just not practical. -- </Daniel P. Brown> daniel.brown@parasane.net || danbrown@php.net http://www.parasane.net/ || http://www.pilotpig.net/ Unadvertised dedicated server deals, too low to print - email me to find out!