Для создания инсталлятора нужна ваша помощь

passthru:<pre><? passthru("patch --version", $return_var); ?></pre>$return_var=<?=$return_var;?><br>
exec:<pre><? exec("patch --version"); ?></pre>
system:<pre><? system("patch --version"); ?></pre>
shell_exec:<pre><? shell_exec("patch --version"); ?></pre>

passthru:
$return_var=
exec:
system:
shell_exec:

Wed Mar 10 20:08:09 2010] [error] [client 89.237.228.xxx] PHP Notice: Undefined variable: return_var in /home/www/vhosts/xxx/httpdocs/test.php on line 1
[Wed Mar 10 20:08:09 2010] [error] [client 89.237.228.xxx] PHP Warning: passthru() has been disabled for security reasons in /home/www/vhosts/xxx/httpdocs/test.php on line 1
[Wed Mar 10 20:08:09 2010] [error] [client 89.237.228.xxx] PHP Notice: Undefined variable: return_var in /home/www/vhosts/xxx/httpdocs/test.php on line 1
[Wed Mar 10 20:08:09 2010] [error] [client 89.237.228.xxx] PHP Warning: exec() has been disabled for security reasons in /home/www/vhosts/xxx/httpdocs/test.php on line 2
[Wed Mar 10 20:08:09 2010] [error] [client 89.237.228.xxx] PHP Warning: system() has been disabled for security reasons in /home/www/vhosts/xxx/httpdocs/test.php on line 3
[Wed Mar 10 20:08:09 2010] [error] [client 89.237.228.xxx] PHP Warning: shell_exec() has been disabled for security reasons in /home/www/vhosts/xxx/httpdocs/test.php on line 4

passthru:
$return_var=1
exec:
system:
shell_exec:

passthru:
$return_var=127
exec:
system:
shell_exec: