From: nickj-php at nickj dot org
Operating system: Any
PHP version: Irrelevant
PHP Bug Type: Feature/Change Request
Bug description: Requesting a nicer way of setting undefined variables to a default
value.
Description:
------------
Requesting a nicer way of setting undefined variables to a default value.
It gets a bit repetitive and ugly having to use statements like:
$title = isset($vals["title"]) ? $vals["title"] : "";
$first = isset($vals["first_name"]) ? $vals["first_name"] : "";
$surname = isset($vals["surname"]) ? $vals["surname"] : "";
This seems to be a recurrent requirement, so ideally there would be some
way of doing this, along the lines of :
function noUnset($val, $default="") {
return isset($val) ? $val : $default;
}
Unfortunately a user function such as the above cannot be defined to do
this, since the first argument passed to the function would be unset.
For example, this code will generate an error:
==========================================
error_reporting (E_ALL);
function noUnset($val, $default="") {
return isset($val) ? $val : $default;
}
if (isset($x)) unset ($x);
// $x = 2; // works OK if this line is uncommented
print noUnset($x, "not set");
// Above line generates an error as noUnset cannot be called with $x,
because it is not set - catch-22 !
==========================================
This code generates an "Undefined variable: x" error.
Ideally there would be slightly nicer way of setting defaults than a bank
is "isset" statements, that would work without generating an error, even
with all error reporting options turned on.
--
Edit bug report at http://bugs.php.net/?id=24949&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=24949&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=24949&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=24949&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=24949&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=24949&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=24949&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=24949&r=support
Expected behavior: http://bugs.php.net/fix.php?id=24949&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=24949&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=24949&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=24949&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=24949&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=24949&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=24949&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=24949&r=gnused
