On Mon, 2002-02-04 at 19:22, Jared wrote:
> I am creating a script that reads "Radius" log files and prints them to
> the browser. I want the User to be able to specify the Number of lines
> they want to see beginning at the end of the file and going up instead
> of reading the lines at the beginning (Which I can do).
> Does anyone have an idea on how to do this?
>
> Thanks in Advanced Jared
I came up with two little routines for this sort of thing. The one using
arrays is faster on small files; the one using fseek() is much, much
faster on big files. Take your pick:
<?php
function tail($filename, $lines) {
/* Read file into an array. */
$text = file($filename);
/* Move to the last line. */
end($text);
/* Back up until we're the right number of lines from the end. */
for ($i = 1, $cnt = count($text); $i < $lines && $i <= $cnt; $i++) {
prev($text);
}
/* Now just dump them. */
while (list(, $line) = each($text)) {
echo $line;
}
}
function tail($filename, $lines) {
/* Open and position the pointer at the end of the file. */
$fp = fopen($filename, 'r');
fseek($fp, 0, SEEK_END);
$filesize = filesize($filename);
$nls = 0;
$i = 1;
while ($nls < $lines && $i < $filesize) {
if (($char = fgetc($fp)) === "\n") {
$nls++;
}
fseek($fp, -2, SEEK_CUR);
$i++;
}
$text = '';
while (!feof($fp)) {
$text .= fgets($fp, 4096);
}
echo $text;
fclose($fp);
}
?>
Hope this helps,
Torben
--
Torben Wilson <[EMAIL PROTECTED]>
http://www.thebuttlesschaps.com
http://www.hybrid17.com
http://www.inflatableeye.com
+1.604.709.0506
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