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Request #63815 please provide a shortcut language syntax
Submitted: 2012-12-20 14:42 UTC Modified: 2012-12-20 16:42 UTC
From: php at lool dot fr Assigned:
Status: Not a bug Package: *General Issues
PHP Version: Irrelevant OS: all
Private report: No CVE-ID: None
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 [2012-12-20 14:42 UTC] php at lool dot fr 
Description:
------------
it is both long to write and difficult to read to have many lines like this in the source code:

$value  = isset($_POST['blabla']) ? $_POST['blabla'] : 'init_value';

it would be easier to have something like:

$value = isnotset($var,'init_value');

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 [2012-12-20 14:59 UTC] pajoye@php.net
-Status: Open +Status: Not a bug
 [2012-12-20 14:59 UTC] pajoye@php.net 
Use the ?: operator:

$v = $_POST['blabla'] ?: 'init_value';
 [2012-12-20 15:10 UTC] php at lool dot fr 
using  $v = $_POST['blabla'] ?: 'init_value';

produces an error:

Notice: Undefined index 'blabla' ...  
the call to isset is also important to distinguish between an empty value and a not set value!!!
 [2012-12-20 16:34 UTC] nikic@php.net 
Userland implementation of said function:

    function isnotset(&$var, $default) {
        if (isset($var)) {
            return $var;
        } else {
            return $default;
        }
    }
 [2012-12-20 16:42 UTC] php at lool dot fr 
the purpose of a language syntax shortcut is both functionnality and performance.

currently, 2 array access to the same element is necessary, as with  built-in implementation, only 1 access will be done!

I do not even mention of a function call overhead!
 
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