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Showing results for tags 'php read log'.
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Hi I'm trying to watch a plain text file for any changes. I want to use PHP and read the file line by line as new lines are added. Some times 1 line may be added, other times dozens of lines could be added. I want to read each line and check if it matches any keywords.. This is what I've got so far, but it's not line by line... it's buffer size based. <?php $file='log.txt'; $line = $lastpos = 0; while (true) { usleep(500000); clearstatcache(false, $file); $len = filesize($file); if ($len < $lastpos) { $lastpos = $len; } elseif ($len > $lastpos) { $f = fopen($file, "rb"); if ($f === false) die(); fseek($f, $lastpos); while (!feof($f)) { $buffer = fread($f, 4096); if ($lastpos > 0) { if (strpos($buffer, 'MATCH') !== false) echo "$line\r\n"; } flush(); $line++; } $lastpos = ftell($f); fclose($f); } } ?> Can anyone help point me in the right direction. Ideally I don't want to keep the log in memory as it could grow to a reasonable size. Thanks
