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<?php
 if(!@getimagesize("./img/bild.jpg")){
  echo "<p><b>Fehler 404</b></p><p>Fehler: Das Bild konnte auf dem Server nicht gefunden werden!</p>";
 }
?>

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Options +FollowSymLinks
RewriteEngine on
# Redirect missing catalog images to a default image. Let other missing resource requests 404 normally.
RewriteCond %{REQUEST_URI} !-U # if requested resource doesn't exist
RewriteRule ^catalog_image_path/.*.gif$ /default_image_path/default.gif [L] # redirect to default image

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<img src="<?php
if (!@getimagesize ("./img/webcambild.jpg")) {
echo "../img/ersatwebcambild.jpg"; // Bild das als Ersatz kommt
}
else {
echo "../img/webcambild.jpg"; // Bild das als Standart erscheint, wenn kein Fehler vorhanden!
}
?>" height="150" width="150" alt="webcambildoderso">

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<img src="<?php
if (!@getimagesize ("webcam.jpg")) {
echo "webcam_e.jpg";
}
else {
echo "webcam.jpg";
}
?>" height="240" width="320" alt="webcam"><br>
            <font color="#003300"> <br>
            <?php
$filename = "webcam.jpg";
$timestamp =  filemtime($filename);
$date =  date(dMY, $timestamp);
$hour = date(H, $timestamp);
$hour = $hour + 1;
if ($hour > 24) {

	$hour = $hour - 24;
}
$time = date(a, $timestamp);
$minutes = date(i, $timestamp);
echo("Last updated:  " . $hour . ":" . $minutes . " - " . $date . "  (local time)");
?>