rtrim() a specific string

Haakon

Is it possible to trim a specific string of characters from the end of an existing string? I know you can use rtrim() to strip characters off, but rtrim() reads a character, one at a time, comparing it to the end of the string. I want to eliminate an entire string (and ONLY that string) from the end of the string in question.

Example:

I have a string that looks like this:
2:E,9,4:B+C,5-D,6:C+G&D,12:0+E,8:E

I want to trim ,9,4:B+C,5-D,6:C+G&D,12:0+E,8:E off the end so that it leaves only 2:E. However, if I did rtrim($string,',9,4:B+C,5-D,6:C+G&D,12:0+E,8:E'); It would eat up everything, because "2," ":," and "E," are all contained in the trim parameters. Does that make sense? I'm basically looking for a literal trim kind of function.

Thanks.

thoand

If you only and always need the 3 first characters, eg.

2:E

you could use substr();


$foo = substr("2:E,9,4:B+C,5-D,6:C+G&D,12:0+E,8:E", 0, 2);
echo $foo; //returns 2:E

regards Thomas A.

Haakon

No, it's always different. The only constant is that I need all of the characters before the first comma - and if there is only one set, there isn't a comma displayed at all.