Reading A File In Reverse

sonnysavage

I am trying to parse a log file, and I want to read it line by line beginning at the end of the file and moving backwards.

Is there anyone that can help me with this?

Thanks!

spider_man

$file = file('file.log');

for ($i=count($file); $i>0; $i--)
echo $file[$i];

Haven't tested it, but you get the idea, don't you.

sonnysavage

No, I don't get it... I must be a bit dense. 🙁

The 'count()' function is for arrays. Files are accessed through pointers into the file.

I need to know how to move the pointer to the last line in the file, and then move backwards from there.

ccgorman

What Pablo told you is fine. Did you try it? It puts the lines of a file into an array and you can do what you want for each line.

// get a file into an array
$fcontents = file ('path to/logfile');
while (list ($line_num, $line) = each ($fcontents)) {
echo "Line $line_num: " . htmlspecialchars ($line) . " \n";
}

will print it out line by line, if you do:

$total_lines=count($fcontents);

you will get the total number of lines which means doing a for loop:

for ($i=$total_lines;$i>0;$i--) {
echo "Line $i: " . htmlspecialchars ($fcontents[$i]) . " \n";
}

will print it backwords.

-David

sonnysavage

Thank-you very much everyone!