ID: 50354
Updated by: [email protected]
-Summary: Syntax inconsistency in function (call & definition)
arguments
Reported By: jean dot marc dot leger at gmail dot com
-Status: Open
+Status: Wont fix
Bug Type: Feature/Change Request
Operating System: Gnu/Linux i686
PHP Version: 5.2.11
New Comment:
Trailing commas in function args do not exist in any language and will
not ever exist in PHP either.
Previous Comments:
------------------------------------------------------------------------
[2009-12-01 16:25:15] jean dot marc dot leger at gmail dot com
Description:
------------
PHP has always tolerated one trailing comma (,) at the end of array
declaration, producing no error. I assume this is intended to easily
generate array-syntax compliant php code in a loop.
<?php
/* Array context */
$a = array(); // works fine
// $a = array(,); // will not work: Parse error: syntax error,
unexpected ',', expecting ')'
$a = array(1,2); // works fine
$a = array(1,2,); // works fine : PHP syntax tolerance : last
comma is ignored
//$a = array(1,2,3,,); // will not work: Parse error: syntax error,
unexpected ',', expecting ')'
?>
It would be great to have PHP behaving the same way in function
declaration and function call parameters contexts.
Reproduce code:
---------------
<?php
/* function declaration context */
function myfunction () {return true;} // works
//function myfunction1 (,){return true;} // will not work: Parse
error: syntax error, unexpected ')', expecting '&' or T_VARIABLE
function myfunction2($a,$b){return true;} // works
//function myfunction3($a,$b,){return true;} // will not work (should
have): Parse error: syntax error, unexpected ')', expecting '&' or
T_VARIABLE
/* function call context */
myfunction(); // works fine
//myfunction2(,); // will not work: throws Parse error: syntax
error, unexpected ',', expecting ')'
myfunction3($a,$a); // works fine
//myfunction4($a,$a,); // will not work (should have): throws Parse
error: syntax error, unexpected ')'
Expected result:
----------------
<?php
// This declaration shouldn't raise any parse error
function myfunction3($a,$b,){return true;}
// neither does this function call :
myfunction4(1,2,);
// in either cases, the last comma should just be silently ignored by
the parser.
Actual result:
--------------
<?php
function myfunction3($a,$b,){return true;}
// Parse error: syntax error, unexpected ')', expecting '&' or
T_VARIABLE
myfunction4($a,$a,);
// Parse error: syntax error, unexpected ')'
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=50354&edit=1
