Reading ONLY the last 50 lines of a large text file

Question

I have a pretty large log file on my server, and i would like to have a continually updating console view on my website, showing only the last 50 or so lines of the file

the problem is that it takes too long to load the entire file every time, so i need a way to load only the nescsarry lines, (if possible) or another solution that works.

thanks in advance

You could use something like `exec('tail')` – Explosion Pills Mar 17 '13 at 20:35 — Explosion Pills, Mar 17 '13 at 20:35

score 0 · Answer 1 · edited May 23 '17 at 10:25

0

I'd say it's an exact duplicate (as John Conde mentioned), unless you want to do it client-side, in which case maaaybe, just maybe, you could do it with HTTP byte serving.

I do recommend you do this with PHP, so read that question.

edited May 23 '17 at 10:25

Community

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answered Mar 17 '13 at 20:55

Camilo Martin

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so the post John linked to, also includes updating the file, i might have missed out on that part – Daniel Holst Mar 17 '13 at 21:38

score -1 · Answer 2 · answered Mar 17 '13 at 20:44

-1

$file = file("file.txt");
for ($i = count($file)-50; $i < count($file); $i++) {
echo $file[$i] . "\n";
}

Untested, but...?

answered Mar 17 '13 at 20:44

Mattios550

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that's php thou, not sure i can make that update continually – Daniel Holst Mar 17 '13 at 20:55
This will update continually. When you put it in a page and open the page, it will get the last 50 lines no matter what. Also you tagged it as `php`, so... – Mattios550 Mar 18 '13 at 07:25

Reading ONLY the last 50 lines of a large text file

2 Answers2

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