Original Code Submission - UTF-8 Functions

Dear Sir, I have a new website written in PHP. The code for the website is completely original, (with the exception of an open-source PHP RSS parser.) To write this website I challenged myself to accomplish two things: 1) Design an interactive website free of Javascript. 2) Design a website compatible with all languages available through the UTF-8 character set. In order to accomplish this I had to write string and array functions that can handle UTF-8 universally. I have several functions that do just that. I want to contribute these simple functions to future versions of PHP. I also have a question regarding my use of PHP: Is my program, (named YOYO,) actually proprietary? The code is completely original, but my question originates in the fact that PHP is itself open-source. If PHP is open-source, is it possible for programs written in PHP to be legally proprietary? Sincerely, Christopher Isaac Deilson Krishna Jacobs yad1(dot)org