最初に保存せずに Web ブラウザーで表示できるサムネイルを作成するサムネイル画像作成スクリプトをテストしています。
現在、画像を表示するには次のコードを使用する必要があります。
include('image.inc.php');
    header('Content-Type: image/png');
    create_thumbnail('me.jpg', false, 200, 200);
しかし、動的に生成されたサムネイル画像を標準の Web ページに HTML マークアップと一緒に表示するにはどうすればよいでしょうか?
create_thumbnail 関数:
function create_thumbnail($path, $save, $width, $height){
    // Get the width[0] and height[1] of image in an array
    $info = getimagesize($path);
    // Create a new array that just contains the width and height
    $size = array($info[0], $info[1]);
    // Check what file type the image is
    if($info['mime'] == 'image/png'){
        $src = imagecreatefrompng($path);
    }else if($info['mime'] == 'image/jpeg'){
        $src = imagecreatefromjpeg($path);
    }else if($info['mime'] == 'image/gif'){
        $src = imagecreatefromgif($path);
    }else{
        // If it isn't a good file type don't do anything
        return false;
    }
    // Create a thumbnail with the passed dimensions
    $thumb = imagecreatetruecolor($width, $height);
    $src_aspect = $size[0] / $size[1];
    $thumb_aspect = $width / $height;
    if($src_aspect < $thumb_aspect){
        // Image is tall
        $scale = $width / $size[0];
        $new_size = array($width, $width / $src_aspect);
        $src_pos = array(0, ($size[1] * $scale - $height) / $scale / 2);
    }else if($src_aspect > $thumb_aspect){
        // Image is wide
        $scale = $height / $size[1];
        $new_size = array($height * $src_aspect, $height);
        $src_pos = array(($size[0] * $scale - $width) / $scale /2, 0);
    }else{
        // Image is square
        $new_size = array($width, $height);
        $src_pos = array(0, 0);
    }
    // Stop the new dimensions being less than 1 (this stops it breaking the code). Takes which ever value is higher.
    $new_size[0] = max($new_size[0], 1);
    $new_size[1] = max($new_size[1], 1);
    // Copy the image into the new thumbnail 
    // Newly created thumbnail, image copying from, starting x-coord of thumbnail, starting y-coord of thumbnail(0,0 will fill up entire thumbnail), x-coord of original image, y-coord of original image,  width of new thumbnail, height of new thumbnail, width of original image, height of original image
    imagecopyresampled($thumb, $src, 0, 0, $src_pos[0], $src_pos[1], $new_size[0], $new_size[1], $size[0], $size[1]);
    if($save === false){
        return imagepng($thumb);
    }else{
    // Create the png image and save it to passed location
    return imagepng($thumb, $save);
    }