note 47964 added to function.array-walk

I need to put all values of an array into one string line, separated with commas. That's what I'm trying: // inserting commas between array values function array2string($item1, $key, &$string) { if ($string == '') { $string = "$item1"; } else { $string .= ",$item1"; } } // calling the function for each array value array_walk($myarray, 'array2string', $myarray_string); As you can see, I use pass-by-reference for the $myarray_string variable. The problem is that the value is getting passed by I never get the value back from the function. Thus, the value of the $myarray_string is still the same as before calling the "array2string". Is this a PHP bug? ---- Manual Page -- http://www.php.net/manual/en/function.array-walk.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+47964 Delete -- http://master.php.net/manage/user-notes.php?action=delete+47964&report=yes Reason: bad code -- http://master.php.net/manage/user-notes.php?action=delete+47964&report=yes&reason=bad+code Reason: spam -- http://master.php.net/manage/user-notes.php?action=delete+47964&report=yes&reason=spam Reason: useless example -- http://master.php.net/manage/user-notes.php?action=delete+47964&report=yes&reason=useless+example Reason: contains commercial links -- http://master.php.net/manage/user-notes.php?action=delete+47964&report=yes&reason=contains+commercial+links Reason: useless note -- http://master.php.net/manage/user-notes.php?action=delete+47964&report=yes&reason=useless+note Reject -- http://master.php.net/manage/user-notes.php?action=reject+47964&report=yes Search -- http://master.php.net/manage/user-notes.php