- correct ref to function and c/p in the example code

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@329951 c90b9560-bf6c-de11-be94-00142212c4b1
- fix default and add missing bilinear

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@329952 c90b9560-bf6c-de11-be94-00142212c4b1