Problem updating flat file

[amy_ewe]

Hi,

I tried to update the flat file using php by renaming the existing file and insert it back after doing some comparison. However, my problem is I'm not sure why there are additioanl newline inserted when I only specify once only. Could anyone please help me?
Below are the codes.

if (rename("data.txt", "tempdata.txt"))
{
$pNo = $txtNo;
$pKeyword = $txtPrevKeyword;
$nKeyword = $txtKeyword;

$fp=fopen("data.txt", "a");
if (!$fp) {
echo "error!, The file could not be opened!";
exit;

}

$array = file("tempdata.txt");
foreach($array as $row) {
$line = explode("|", $row);
if (TRIM($pNo) <> "" AND TRIM($line[0]) <> "")
{
if (TRIM($line[0]) == TRIM($pNo) && TRIM(preg_replace("[%20]"," ",$line[1]))==TRIM(preg_replace("[%20]"," ",$pKeyword)))
{
$stringToInsert = $pNo."|".$nKeyword."\n";
fwrite($fp, $stringToInsert);
}
else
{
$stringToInsert = $line[0]."|".preg_replace("[%20]"," ",$line[1]);
fwrite($fp, $stringToInsert);
}
}
}
fclose;
header("Location:KeywordListing.php");
unlink("tempdata.txt");
}
else
{
echo "Updating fail!";
header("Location:KeywordListing.php");
}

[amansabharwal]

if there is an extra new line with each insert then trim your variables and then put an new line chars like this:

$stringToInsert = $pNo."|".trim($nKeyword)."\n";

this is because when you are reading from the file the last word in the line you read is in the variable $nKeyword and that also contains a new line char.

so either trim that and put a new line char or don;t trim and don;t even bother to put a new line char.

but it is always better to trim and put a new line char by your self.

aman