linux exec更新svn

<?php/*exec ("sudo locale",$re);foreach ($re as $re1)        {                 echo $re1."<br>";        } */  $locale='en_US.UTF-8';setlocale(LC_ALL,$locale);putenv('LC_ALL='.$locale);//exec ("sudo export LANG=zh_CN.GB18030");/*exec ("sudo locale",$re);foreach ($re as $re1)        {                 echo $re1."<br>";        } */ exec ("sudo  /usr/bin/svn up /home/wwwroot/server --username zhangyang --password zjjingbanyun123 2>&1",$re,$res);         foreach ($re as $re1)        {                 echo $re1."<br>";        }         ?>