Separate 4 variables with commas

[clorenger]

I'm sure this is very simple to do, but I'm really having a hard time with it and would appreciate a hand.

I have 4 variables that I'm retrieving from my db. They may have values or they may be null.

I'm trying to output the variables separated by a comma. My problem is that I want to suppress the comma if the variable is null.

If all four values were populated, I'd like it to look like this:

  first, second, third, fourth

Or if only two of the four, like this:

  first, fourth

(etc.)

Right now, I get:

 first, , , fourth

because I'm using "echo $a, $b, $c, $d"

Can you help me figure out my comma formatting? I've tried a variety of "if" and "while" loops and just can't seem to get it.

Thanks ever so much!

[LordShryku]

should be able to just check for empties...

$string = "";
$string .= empty($a)?NULL:$a.",";
$string .= empty($b)?NULL:$b.",";
$string .= empty($c)?NULL:$c.",";
$string .= empty($d)?NULL:$d.",";
$string = substr($string,0,-1); // remove last comma

[clorenger]

Oh thank you, thank you!!

This is a big help, and I've learned how to attack this type of problem in the future!

Really appreciate it!