replacing characters in a string

anybody have a simple php script that i can use to replace characters in a string? i want to replace all hyphens with spaces....

*edit-also, how do i compare one string to another without considering capitalization. example, i'd like if (steve==Steve) to result in true.

thanks in advance,
steve

ok, got the str_replace to work...

just transform both values to all-uppercase or lowercase (with strtoupper() ) or lowercase (with ...)