On Wed, Apr 20, 2011 at 11:50 PM, Mark <mark...@gmail.com> wrote:
> On Wednesday, April 20, 2011, D. Dante Lorenso <da...@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
>>
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>>
> 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
>
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>
Hi,
As Hannes said, the other thread discussing this feature (although the
subject line may suggest otherwise) is still active, so please move
this discussion there:
"[PHP-DEV] Implicit isset/isempty check on short-ternary operator"
Cheers,
Arpad
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