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Bug #51878 A bug about function's reference params
Submitted: 2010-05-21 03:48 UTC Modified: 2010-05-21 11:27 UTC
From: inqing at gmail dot com Assigned:
Status: Not a bug Package: Unknown/Other Function
PHP Version: 5.2.13 OS: Linux & windows
Private report: No CVE-ID: None
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 [2010-05-21 03:48 UTC] inqing at gmail dot com 
Description:
------------
for this code when you run in php4, the app will output "func", but under php5 your will get another result -- "php"
I don't know why.

Test script:
---------------
<?php
function func(&$param){
  $param = "func";
}

func($param="php");

echo $param;
?>

Expected result:
----------------
func

Actual result:
--------------
php

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 [2010-05-21 10:42 UTC] johannes@php.net
-Status: Open +Status: Bogus
 [2010-05-21 10:42 UTC] johannes@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

With an expression like

do_something($foo = 'bar');

the behavior is undefined. We don't guarantee i which order the function call and the assignment are being executed. This might change any time.
 [2010-05-21 11:27 UTC] mike@php.net 
http://php.net/manual/en/language.references.pass.php
 
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