Removing a comma from the end of an array

[cookie2]

I am reading a file into an array using this:

$listFile = "add2db.txt";
if (!($fp = fopen($listFile, "r")))
exit("Unable to open the input file, $listFile.");
$buffer = fread($fp, filesize($listFile));
fclose($fp);

The very last character in that $listFile will always be a comma. What I need to do is remove that last comma (and only that comma) from $buffer before I can continue on. What do I need to do to accomplish this?

[Glacai]

$buffer = rtrim($buffer, ",");

[cookie2]

Thanks but that it were that easy. :( It does not work. I tried using
$listFile = "add2db.txt";
if (!($fp = fopen($listFile, "r")))
exit("Unable to open the input file, $listFile.");
$buffer = fread($fp, filesize($listFile));
fclose($fp);
$buffer = rtrim($buffer, ",");
echo "$buffer";
die;

and the last comma is still there. Any other ideas?

[Glacai]

Works ok for me, is there always only one comma at the end? Could also try this

if($buffer[($len = strlen($buffer)-1)] == ',') $buffer[$len] = '';

Added:
Or it could be because of a newline or eof so try changing rtrim to
$buffer = rtrim($buffer, "\n,");

[edited by: Glacai at 3:18 am (utc) on June 19, 2004]

[johnerazo]

The very last character in that $listFile will always be a comma. What I need to do is remove that last comma (and only that comma) from $buffer before I can continue on. What do I need to do to accomplish this?

Since there will always be a 'comma' at the end, you can try this ...

$buffer = substr($buffer, 0, strlen($buffer)-1);

It gets the first character of $buffer up to the end minus that 1 character which is the 'comma'.