<?php # Script 19.8 - show_image.php
// This pages retrieves and shows an image.

// Flag variables:
$image = FALSE;
$name = (!empty($_GET['name'])) ? $_GET['name'] : 'print image';

// Check for an image value in the URL:
if (isset($_GET['image']) && filter_var($_GET['image'], FILTER_VALIDATE_INT, array('min_range' => 1))  ) {

	// Full image path:
	$image = SITE_URL.'/exercises/19/images/' . $_GET['image'];

	// Check that the image exists and is a file:
	if (!file_exists ($image) || (!is_file($image))) {
		$image = FALSE;
	}
	
} // End of $_GET['image'] IF.

// If there was a problem, use the default image:
if (!$image) {
	$image = 'images/unavailable.png';
	$name = 'unavailable.png';
}

// Get the image information:
$info = getimagesize($image);
$fs = filesize($image);

// Send the content information:
header ("Content-Type: {$info['mime']}\n");
header ("Content-Disposition: inline; filename=\"$name\"\n");
header ("Content-Length: $fs\n");

// Send the file:
ob_start();
readfile ($image);
$data = ob_get_clean();
var_dump($data);