#30778 [Opn]: need unset support for putenv
| From: | tony2001@php.net | Date: | Sat, 13 Nov 2004 21:20:49 +0000 |
| Subject: | #30778 [Opn]: need unset support for putenv | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-69020@lists.php.net to get a copy of this message | ||
ID: 30778
Updated by: tony2001@php.net
Reported By: sagawa at sohgoh dot net
Status: Open
Bug Type: Feature/Change Request
Operating System: FreeBSD, SunOS
PHP Version: 4.3.9
New Comment:
Just as a comment:
It seems that only Linux supports unsetting env vars with putenv("VAR")
and under others OSes putenv() fails with -1 in this case.
Previous Comments:
------------------------------------------------------------------------
[2004-11-13 21:44:57] sagawa at sohgoh dot net
Description:
------------
PHP doesn't support unsetenv, therefore I can't unset environment
variable.
On Linux box, putenv C function supports putenv("FOO") syntax that
vanish FOO environment variable. But other OS (such as SunOS, FreeBSD)
is not. Therefore please add putenv("FOO") feature to others in PHP5.
Note: please distinguish empty variable (= getenv returns "") from
undefined one (= getenv returns false).
Reproduce code:
---------------
<?php
echo "OS: ",PHP_OS,"\n";
echo "foo is "; var_dump(getenv("FOO"));
echo "---\n";
echo "putenv(\"FOO=bar\"): "; var_dump(putenv("FOO=bar"));
echo "foo is "; var_dump(getenv("FOO"));
echo "---\n";
echo "putenv(\"FOO=baz\"): "; var_dump(putenv("FOO=baz"));
echo "foo is "; var_dump(getenv("FOO"));
echo "---\n";
echo "putenv(\"FOO\"): "; var_dump(putenv("FOO"));
echo "foo is "; var_dump(getenv("FOO"));
?>
Expected result:
----------------
% php envtest.php
OS: Linux
foo is bool(false)
---
putenv("FOO=bar"): bool(true)
foo is string(3) "bar"
---
putenv("FOO=baz"): bool(true)
foo is string(3) "baz"
---
putenv("FOO"): bool(true)
foo is bool(false)
% env FOO=foo php envtest.php
OS: Linux
foo is string(3) "foo"
---
putenv("FOO=bar"): bool(true)
foo is string(3) "bar"
---
putenv("FOO=baz"): bool(true)
foo is string(3) "baz"
---
putenv("FOO"): bool(true)
foo is bool(false)
Actual result:
--------------
% php envtest.php
OS: FreeBSD
foo is bool(false)
---
putenv("FOO=bar"): bool(true)
foo is string(3) "bar"
---
putenv("FOO=baz"): bool(true)
foo is string(3) "baz"
---
putenv("FOO"): bool(false)
foo is bool(false)
% env FOO=foo php envtest.php
OS: FreeBSD
foo is string(3) "foo"
---
putenv("FOO=bar"): bool(true)
foo is string(3) "bar"
---
putenv("FOO=baz"): bool(true)
foo is string(3) "baz"
---
putenv("FOO"): bool(false)
foo is string(3) "baz"
% php envtest.php
OS: SunOS
foo is bool(false)
---
putenv("FOO=bar"): bool(true)
foo is string(3) "bar"
---
putenv("FOO=baz"): bool(true)
foo is string(3) "baz"
---
putenv("FOO"): bool(true)
foo is bool(false)
% env FOO=foo php envtest.php
OS: SunOS
foo is string(3) "foo"
---
putenv("FOO=bar"): bool(true)
foo is string(3) "bar"
---
putenv("FOO=baz"): bool(true)
foo is string(3) "baz"
---
putenv("FOO"): bool(true)
foo is string(3) "foo"
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=30778&edit=1