Parse error: syntax error, unexpected T_OBJECT_OPERATOR

After uploading project on my webserver I came up with this kind of error:

Parse error: syntax error, unexpected T_OBJECT_OPERATOR in path\to\project\web\index.php on line 12

which is this line:
sfContext::getInstance()->getController()->dispatch();

The problem was in PHP version set on webserver. So when I looked at check_configuration.php is saw that webserver is set for PHP4.

After changing into PHP5, everything went all right.