Tiny script in PHP

Hello! I need a very small script in PHP that does the following: There are 3 text fields and a submit button. The user fills in 3 words, one in each text field and presses the submit button. The script looks up the words in a database or in a text file, and upon finding a match for all 3 words in the correct order, takes the user to a URL which is also contained in the database or text file. The 'words' to be filled in in the text fields should be able to contain spaces and accents. Upon error (words not found in the database/text file) an error message should be displayed on top of the text field bar. Our server runs on MySQL and a table can be added easily, of course, but I'd rather have it working database independent, XML or simple text. This is a very quick script: no more specs will be provided apart from this. Also, no design is needed, we'll take care of that afterwards. If you don't understand the specs, or have doubts, please don't hesitate to ask. Thank you! Peter