where to put a function

Probably been answered a thousand times; if so, just tell me where to look. I have a function that includes a specific sql query that is used on only one page on the site. Should that function be coded (1) in the page itself, (2) in a separate file that only that page includes, or (3) in a master file that contains all the functions used on the site and is included on every page? I've been doing #1 (not actually a function in this case) but #3 is appealing, especially since I would implement it as OOP and the page itself would be really just a template. What is the cost of parsing a bunch of functions that are not used on a given page load? -- "If some peoples pretend that history or geography gives them the right to subjugate other races, nations, or peoples, there can be no peace." -- Ludwig von Mises Rick Pasotto rick@niof.net http://www.niof.net