1

我想复制、调整大小和（如果不是太难的话）裁剪图像。

例如：我有一个尺寸为 1200 高度 X 2300 宽度的图像。我想制作一个 100x100 像素的缩略图，在这种情况下，因为高度小于宽度，所以高度应该在新图像上 100% 可见，并且宽度应该保持图像的纵横比。这是一个示例图像。

额外细节：

我正在使用 wamp，我启用了 Gd 2 当我尝试重写此站点上示例中的代码时，我只是得到损坏的图像。

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2 回答 2

1

试试这个，它来自Resize Images Using PHP and GD Library一 文 

define('THUMBNAIL_IMAGE_MAX_WIDTH', 150);
define('THUMBNAIL_IMAGE_MAX_HEIGHT', 150);

function generate_image_thumbnail($source_image_path, $thumbnail_image_path)
{
    list($source_image_width, $source_image_height, $source_image_type) = getimagesize($source_image_path);
    switch ($source_image_type) {
        case IMAGETYPE_GIF:
            $source_gd_image = imagecreatefromgif($source_image_path);
            break;
        case IMAGETYPE_JPEG:
            $source_gd_image = imagecreatefromjpeg($source_image_path);
            break;
        case IMAGETYPE_PNG:
            $source_gd_image = imagecreatefrompng($source_image_path);
            break;
    }
    if ($source_gd_image === false) {
        return false;
    }
    $source_aspect_ratio = $source_image_width / $source_image_height;
    $thumbnail_aspect_ratio = THUMBNAIL_IMAGE_MAX_WIDTH / THUMBNAIL_IMAGE_MAX_HEIGHT;
    if ($source_image_width <= THUMBNAIL_IMAGE_MAX_WIDTH && $source_image_height <= THUMBNAIL_IMAGE_MAX_HEIGHT) {
        $thumbnail_image_width = $source_image_width;
        $thumbnail_image_height = $source_image_height;
    } elseif ($thumbnail_aspect_ratio > $source_aspect_ratio) {
        $thumbnail_image_width = (int) (THUMBNAIL_IMAGE_MAX_HEIGHT * $source_aspect_ratio);
        $thumbnail_image_height = THUMBNAIL_IMAGE_MAX_HEIGHT;
    } else {
        $thumbnail_image_width = THUMBNAIL_IMAGE_MAX_WIDTH;
        $thumbnail_image_height = (int) (THUMBNAIL_IMAGE_MAX_WIDTH / $source_aspect_ratio);
    }
    $thumbnail_gd_image = imagecreatetruecolor($thumbnail_image_width, $thumbnail_image_height);
    imagecopyresampled($thumbnail_gd_image, $source_gd_image, 0, 0, 0, 0, $thumbnail_image_width, $thumbnail_image_height, $source_image_width, $source_image_height);
    imagejpeg($thumbnail_gd_image, $thumbnail_image_path, 90);
    imagedestroy($source_gd_image);
    imagedestroy($thumbnail_gd_image);
    return true;
}
?>
于 2012-09-24T19:12:18.737 回答
0

您是否尝试过使用Timthumb？这是一个很好的小脚本，符合您的要求。如果您的图像文件损坏，您的 GD 安装可能会出错，但如果没有看到任何代码，就很难猜到。您是否有任何其他机器（可能是带有 LAMP 堆栈的网络主机）来在那里测试您的代码？

于 2012-09-24T19:15:46.273 回答