change url string

[webnoob]

how can i change the '&', '?', '=' characters in a url to something else?

ie:

page.php?school=23

to:

page.php,school~23

i've seen a tutorial somewhere how to do this within php scripts.. can't find the page though.
thanks for any help.

[jatar_k]

you could use str_replace [php.net]

[whoisgregg]

Although I bet urlencode [php.net] would be a helpful function for this specific scenario... that or htmlentities.