#46083 [NEW]: PHP allows default parameters to appear before required parameters
From: kevin dot benton at beatport dot com
Operating system: All
PHP version: 5.2.6
PHP Bug Type: Feature/Change Request
Bug description: PHP allows default parameters to appear before required parameters
Description:
------------
PHP allows default parameters to appear before required parameters
From http://www.php.net/manual/en/functions.arguments.php,
It reports that...
<?php
function makeyogurt($type = "acidophilus", $flavour)
{
return "Making a bowl of $type $flavour.\n";
}
echo makeyogurt("raspberry"); // won't work as expected
?>
will generate this output:
Warning: Missing argument 2 in call to makeyogurt() in
/usr/local/etc/httpd/htdocs/phptest/functest.html on line 41
Making a bowl of raspberry .
I think this is simply nasty behavior. If $type is defaulted and not
specified, PHP should know that it's a default parameter from the parameter
count and shift accordingly or generate a syntax error. A default
parameter that appears to the left of a required parameter isn't optional
with the way parameters are processed in PHP today.
I would rather have seen one of these results:
Error: makeyogurt() specifies required parameters after defaulted
parameters in /usr/local/etc/httpd/htdocs/phptest/functest.html on line
41.
or
Making a bowl of acidophilus raspberry.
While the second solution was rejected in http://bugs.php.net/24153, I
believe the first solution is still valid and quite frankly, appropriate.
If nothing else, this should be an option in php.ini to prohibit optional
parameters before required parameters.
C programmers are familiar with being able to do this by turning on -Wall
-Werror
Reproduce code:
---------------
See description
Expected result:
----------------
See description
Actual result:
--------------
See description
--
Edit bug report at http://bugs.php.net/?id=46083&edit=1
--
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=46083&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=46083&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=46083&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=46083&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=46083&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=46083&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=46083&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=46083&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=46083&r=support
Expected behavior: http://bugs.php.net/fix.php?id=46083&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=46083&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=46083&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=46083&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46083&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=46083&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=46083&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=46083&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=46083&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=46083&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=46083&r=mysqlcfg
Thread (2 messages)
- kevin dot benton at beatport dot com