<?php
# Constants
$IMAGE_BASE = 'img/avt/';
$MAX_WIDTH = 80; // максимальная ширина
$MAX_HEIGHT = 200; // максимальная высота

# Get image location
$image_file = str_replace('..', '', $_SERVER['QUERY_STRING']);
$image_path = $IMAGE_BASE . "/$image_file";

# Load image
$img = null;
$ext = strtolower(end(explode('.', $image_path)));
if ($ext == 'jpg' || $ext == 'jpeg') {
$img = @imagecreatefromjpeg($image_path);
} else if ($ext == 'png') {
$img = @imagecreatefrompng($image_path);
# Only if your version of GD includes GIF support
} else if ($ext == 'gif') {
$img = @imagecreatefromgif($image_path);
}

# If an image was successfully loaded, test the image for size
if ($img) {

# Get image size and scale ratio
$width = imagesx($img);
$height = imagesy($img);
$scale = min($MAX_WIDTH/$width, $MAX_HEIGHT/$height);

# If the image is larger than the max shrink it
if ($scale < 1) {
if (($width > $MAX_WIDTH) OR ($height > $MAX_HEIGHT)) {
$new_width = floor($scale*$width);
$new_height = floor($scale*$height);
# Create a new temporary image
$tmp_img = imagecreatetruecolor($new_width, $new_height);
# Copy and resize old image into new image
imagecopyresampled($tmp_img, $img, 0, 0, 0, 0,
$new_width, $new_height, $width, $height);
imagedestroy($img);
$img = $tmp_img;
}
}else{
header("Location: $image_path");
exit;
}}

# Create error image if necessary
if (!$img) {
$img = imagecreate($MAX_WIDTH, $MAX_HEIGHT);
imagecolorallocate($img,0,0,0);
$c2 = imagecolorallocate($img,70,70,70);
imageline($img,0,0,$MAX_WIDTH,$MAX_HEIGHT,$c2);
imageline($img,$MAX_WIDTH,0,0,$MAX_HEIGHT,$c2);
}

# Display the image
header("Content-type: image/jpeg");
imagejpeg($img);
?>