phpinfo() is not working it shows blank page but other php working

Use error_reporting(E_ALL); and ini_set('display_errors', TRUE); you might find an error saying that phpinfo is on the restricted functions list (x10hosting may not want anyone to find out their configurations/ weaknesses etc.).

Check your php.ini file, and grep for disable_function:

cat php.ini | grep -in "disable_function"

If the output has phpinfo in this line as such:

386:disable_functions = show_source, system, shell_exec, passthru, exec, phpinfo, popen, proc_open

edit the file and remove phpinfo from this line and save. You may need to restart httpd

service httpd restart

phpinfo() is disabled for free accounts on that particular hosting provider. You have to upgrade if you want access to phpinfo().