Web page PHP calls the shell script to perform the SVN update issue.

Phpsvnshellweb

Great gods, Help!

svnupdate.php Code:
Set_time_limit (0);
System ("/usr/bin/sudo/usr/www/svnupdate.sh");
?>

Svnupdate.sh Code:
Time= "$ (date +"%y%m%d-%h%m%s ")"
Codes= "/usr/www/codes"

#update the codes from SVN server
/USR/BIN/SVN update $codes/tiyushe--username xx--password xx--no-auth-cache

A problem occurred:
1, the Linux terminal, the WWW (root) user to execute PHP svnupdate.php can be updated normally
2, in the Web page, click the button, then a blank
3. If the update is replaced with checkout or export, the Linux terminal and Web page can be executed normally.

What could be the reason? A day of troubleshooting.

