urgent help, regular expressions

[simon13]

Hello all,
I feel kind of bad asking this, I really thought I could get it myself but .....
Ok, here is a file I read into a string:

20020728 ;211952 ;5147697543 ;4186607023 ;5147697543 ;5147697543 ;5009070510 ;18.14 ;18.23330 ;0.7300 ;010101 ;6 ;4 ;1 ;000001030000044000100000000006 ;MONTREAL ;PQ ;CANADA ;QUEBEC ;PQ ;CANADA ;  ;CANADA ;CANADA ;001 ;  ;  ;   ;0

every entry ends with a zero. I need to do one of two things: either erase the zero or add a semicolon afterwards. The other zeros must remain untouch. I've tried ereg_replace and preg_replace but i can't seem to find the right regular expression to get the thing done. Either nothing happens or all my zeros get messed up.
Can anyone help?
thanks!
simon

[dc2_jspec]

if I am reading that correctly, an ereg_replace('0$','0;',$file); should work...or substr($file, 0, -1);

-the substr takes off the zero at the end of the file and the ereg adds the semicolon...hope this helps