Re: Re: Rewriting string

On Saturday, January 15, 2011 07:36:33 am Evil Son wrote: > On Sat, Jan 15, 2011 at 10:20 AM, David McGlone <david@dmcentral.net> wrote: > > On Thursday, January 13, 2011 12:45:30 pm Nathan Rixham wrote: > >> ... > >> $categorys = array('home', 'services', 'gallery', > >> 'about_us', > >> 'contact_us', 'testimonials'); > >> foreach($categorys as $category) { > >> $temp = str_replace("_", " ", $category); > >> $_GET['page'] != $category && $temp = '<a > >> href="index.php?page='. > >> $category .'">'.$replace.'</a>'; > >> echo "<li>{$temp}</li>" . PHP_EOL; > >> } > > > > Nathan, thanks for showing me this. I understand the code, except I don't > > understand how you got by without using a conditional (if/else). If it > > were me, I would have written it like: > > ... > > The logical operators are lazy i.e. for "&&", if the expression on the > left is true, then and only then is the right part evaluated. So $temp > is only modified if > $_GET['page'] != $category is true. > > Either way, you get the same answer, vis a vis if the left is false, > the "&&" must be false, so no need to evaluate the right side. > > This idiom is common in shell scripts and is called among other > things: "short cut or short circuit evaluation" Thank you. It's all clear to me now. :-) > > > My questions are, is this wrong? is it amaturish? > > Not in other languages, I doubt in PHP. My skills must be improving :-) -- Blessings David M.