Listing 2: Ping-Statistik

<?php
header("Content-Type: image/jpeg");
$fp = fopen ("ping.txt", "r");
$values = array();
$count = 0;
while (!feof($fp))
{
  $line = fgets($fp, 1024);
  $input = split("\ ", $line);
  $packet = split("=", $input[7]);
  $packet = $packet[1];
  array_push ($values, $packet);
  if ($count == 0) 
    array_pop($values);
    $count++;
}
fclose($fp);
$im = ImageCreateTrueColor(400,100);
$black = ImageColorAllocate($im, 0, 0, 0);
$white = ImageColorAllocate($im, 255, 255, 255);
$red = ImageColorAllocate($im, 255, 0, 0);
$green = ImageColorAllocate($im, 0, 255, 0);
ImageFill($im, 0, 0, $white);
ImageRectangle($im, 0, 0, 399, 99, $black);
$max=max($values);
$fac=$max/100;
$x=0; $y=0;
foreach ($values as $value)
{
  $x_old = $x;
  $x += round(400/count($values));
  $y = abs($height-($value/$fac));
  $y_old = abs($height-($value_old/$fac));
  ImageLine($im, $x_old, $y_old, $x, $y, $red);
  $value_old = $value;
}
ImageJPEG($im, "",80);
?>

Einfachstdiagramm:die Antwortzeiten aus ping, aus einer Datei gelesen (Abb. 2)