#37141 [Bgs->Opn]: Variables initialized in function call cannot be passed by reference

ID: 37141 User updated by: jazfresh at hotmail dot com -Summary: Variable initialization in function happens after function call Reported By: jazfresh at hotmail dot com -Status: Bogus +Status: Open Bug Type: *General Issues Operating System: Linux Fedora Core 5 PHP Version: 5.1.2 New Comment: I did this, and got the message: PHP Strict Standards: Only variables should be passed by reference in /path/to/example.php on line 10 However this does not explain the problem, because it is a variable that is being passed, not a constant. In my reproduce code, the function is being called with the variable "$woz". The only difference is that the variable is initialized in the function call, as opposed to outside it. I would hazard a guess that this is going to break a lot of people's code, because they do things like: exec('/bin/ls -l', $output = array(), $result); which will always return an empty array. Previous Comments: ------------------------------------------------------------------------ [2006-04-20 08:25:06] tony2001@php.net Add error_reporting(E_ALL|E_STRICT) to the beginning of your code and you'll see the explanation. ------------------------------------------------------------------------ [2006-04-20 04:50:40] jazfresh at hotmail dot com Description: ------------ If a variable is initialized inside a function call (e.g. foo($bar, $baz=3) ) and that parameter is a reference, then the variable cannot be altered by the function. It works ok if the variable is initialized outside the function call. This bug exists in PHP 5.1.2. It does not exist in 5.0.3. I checked the changelogs and release notes for all versions inbetween, but I did not find anything that indicated that the language changed in this way. Reproduce code: --------------- function foo(&$bar) { echo "Parameter is $bar\n"; $bar = "baz"; } foo($woz = "abc"); echo "Woz is $woz\n"; $bliz = "abc"; foo($bliz); echo "Bliz is $bliz\n"; Expected result: ---------------- Parameter is abc Woz is baz Parameter is abc Bliz is baz Actual result: -------------- Parameter is abc Woz is abc Parameter is abc Bliz is baz ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=37141&edit=1