<?php
// hemiolos.lima-city.de/forum/image_test.php
echo "<img src=\"./image.php\" alt=\"--\" />";
// source output
echo '<hr />';
highlight_file('./image_test.php');
echo '<hr />';
highlight_file('./image.php');
<?php
// hemiolos.lima-city.de/forum/image.php
$bild = './test.png';
$im = imagecreatefrompng($bild);
header('Content-type: image/png');
imagepng($im);
imagedestroy($im);