php直接调用svn命令

程序如下php_svn.php

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system("/usr/bin/svn co --username xx --password xx --no-auth-cache    http://test.domain.com/application/config/  application/config/");
?>

如果出现如下错误，提示

1、[15-Jan-2014 10:47:47] WARNING: [pool www] child 30635 said into stderr: "svn: Can't make directory 'application/config': Permission denied"

①表示当前php执行所在目录权限不足，可以授予777权限

2、认证错误，解决方法,添加--no-auth-cache

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: ""

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: "can only be stored to disk unencrypted!  You are advised to configure"

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: "your system so that Subversion can store passwords encrypted, if"

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: "possible.  See the documentation for details."

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: ""

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: "You can avoid future appearances of this warning by setting the value"

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: "of the 'store-plaintext-passwords' option to either 'yes' or 'no' in"

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: "'/.subversion/servers'."

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: "-----------------------------------------------------------------------"

[15-Jan-2014 11:15:43] WARNING: [pool www] child 30634 said into stderr: "Store password unencrypted (yes/no)? "