Re: Function proposal: varset

On Wednesday, April 20, 2011, D. Dante Lorenso <dante@lorenso.com> wrote: > On 4/20/11 9:55 AM, Mark wrote: > > Hi, > This proposal is for the often called line like this: > $var = isset($_GET['var']) ? $_GET['var'] : ''; > Only a shorter and imho a cleaner solution to get the same: > $var = varset($_GET['var']); > > The implementation for this in PHP code is this: > > # Arg 1 = the variable to check for existence > # Arg 2 = the default return value which is an empty string by default > > function varset($var, $default = '') > { > return (isset($var) ? $var : $default); > } > > > I proposed something similar over 5 years ago.  It ain't gonna happen because PHP > language can't support it.  The Zend engine needs to be rewritten to remove the warnings and > that's not something they are volunteering to do no matter how much people want it. > >  http://markmail.org/message/yl26ebzcix35wtke > > My proposal was called "filled" since it was the opposite of "empty" which > already existed.  I extended the function to return the first non-empty value or null if all values > evaluated as empty. > > You could use the function like this: > >  $x = filled($_GET['x'], $obj->something, $default, 'default'); > > It would return the first argument where !empty($arg) evaluates as TRUE. > > There would need to be a companion function to check 'isset' opposite as you have > proposed. > > Like I said, though, I don't think this can be done in the language because I think they > ran out of OPCODES and would have to tear apart the whole PHP engine to support such a feature. > > -- Dante > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > > Hi, well, i did propose 2 possible ways although the second one is a little longer but still clean and readable. And the second one is certainly possible to implement! Btw. i did look at the suggested core php code parts and even though i can do nearly everything in php.. i have a hard time understanding how the inner php parsing things actually work. There is no way i'm able to make a patch for php. Regards, Mark