// read.php
<?php
// Last read position
$last = 0;
// Path to the updating log file
$file = 'log.txt';
while (true) {
// PHP caches file information in order to provide faster
// performance; In order to read the new filesize, we need
// to flush this cache.
clearstatcache(false, $file);
// Get the current size of file
$current = filesize($file);
// Reseted the file?
if ($current < $last) {
$last = $current;
}
// If there's new content in the file
elseif ($current > $last) {
// Open the file in read mode
$fp = fopen($file, 'r');
// Set the file position indicator to the last position
fseek($fp, $last);
// While not reached the end of the file
while (! feof($fp)) {
// Read a line and print
print fgets($fp);
}
// Store the current position of the file for the next pass
$last = ftell($fp);
// Close the file pointer
fclose($fp);
}
}