problem in running svn command through php on CentOS

HI All!

 

i am having problem in running all the commands of svn.exe on CentOS through php's exec() function but i am able to run the svnlook commands by exec() function.

 

i am trying to execute svn list file:///PathToRepositoryDir

 

$cmd = "/usr/bin/svn" list file:////var/subversion/devfoundry/

 

i am able to run $cmd thorugh command line but not thorugh exec() function.

 

i have checked the permissions on the executables.svn exe has same permissions as svnlook exe.

 

it's very urgent and i am running out of time :(

Please if anyone can help me out to resolve the issue or have suggestion regarding this i will be greatful.

 

Cheers