How do you swap one chacter for another when pulling from database?

[meeble3]

When I pull a word from the database, if it contains a 3 I want to swap it for a 4.

So the word hgy3uy would become hgy4uy and koplw3 would become koplw4 etc

Any ideas?

Cheers

James

 

[Vragabond]

How about str_replace:

$newstring = str_replace("3","4",$string);