it looks pretty easy really using str_replace in php, all it does is search a text string for all or a number of instances of the text or character that you want to replace and then replaces it with the text you specified.

basic usage:

str_replace ( text_search_for, text_to_replace_with, the_string_applied_to )


example:

$moo = str_replace("moo", "cow", "lick me in the moo");
echo $moo;


will output lick me in the cow

you can also pass a count number, to get a count of the amount of times the search string is found

$moo = str_replace("moo", "cow", "lick me in the moo",$numb);
echo $numb;


will echo 0 (hopefully)

For further reading on this function here is a link to the full manual of str_replace().