This a tail php script example for windows system.
<?php
$n = ( isset($_REQUEST['n']) == true )? $_REQUEST['n']:20;
$offset = -$n * 120;
$rs = fopen('C:/wamp/logs/apache_error.log','r');
if ( $rs === false )
die("No se pudo abrir el archivo de log");
fseek($rs,$offset,SEEK_END);
fgets($rs);
while(!feof($rs))
{
$buffer = fgets($rs);
echo $buffer;
echo "<hr />";
}
fclose($rs);
?>