Reading large files from end

Question

Can I read a file in PHP from my end, for example if I want to read last 10-20 lines?

And, as I read, if the size of the file is more than 10mbs I start getting erro

Answer 1

For Linux you can do

$linesToRead = 10;
exec("tail -n{$linesToRead} {$myFileName}" , $content); 

You will get an array of lines in $content variable

Pure PHP solution

$f = fopen($myFileName, 'r');

    $maxLineLength = 1000;  // Real maximum length of your records
    $linesToRead = 10;
    fseek($f, -$maxLineLength*$linesToRead, SEEK_END);  // Moves cursor back from the end of file
    $res = array();
    while (($buffer = fgets($f, $maxLineLength)) !== false) {
        $res[] = $buffer;
    }

    $content = array_slice($res, -$linesToRead);