Question

我已经建立了一个图片库并“按原样”保存了图像而没有裁剪它。我想在控制器中加载图像时动态调整图像大小，因此当我在浏览器中加载控制器时，它会根据我想要的大小显示图像。我已将方法添加到MY_Loader，这是代码。

function show_image($image, $width, $height) {
    $this->helper('file');
    $image_content = read_file($image);

    //resize image
    $image = imagecreatefromjpeg($image);
    $thumbImage = imagecreatetruecolor(50, 50);
    imagecopyresized($thumbImage, $image, 0, 0, 0, 0, 50, 50, $width, $height);
    imagejpeg($thumbImage,"",85);
    imagedestroy($image);
    imagedestroy($thumbImage);

    header('Content-Length: '.strlen($image_content)); // sends filesize header
    header('Content-Type: '. get_mime_by_extension($image)); // send mime-type header
    header('Content-Disposition: inline; filename="'.basename($image).'";'); // sends filename header
    exit($image_content); // reads and outputs the file onto the output buffer
}

从这段代码中，我收到很多错误，包括标题错误。我做错了什么？

错误:(如果有用）

Message: imagejpeg(): Filename cannot be empty

Message: Cannot modify header information - headers already sent by (output started at /Volumes/www/vhosts/ci/system/core/Exceptions.php:185)

Message: strrchr() expects parameter 1 to be string, resource given

Message: Cannot modify header information - headers already sent by (output started at /Volumes/www/vhosts/ci/system/core/Exceptions.php:185)

Message: basename() expects parameter 1 to be string, resource given

Message: Cannot modify header information - headers already sent by (output started at /Volumes/www/vhosts/ci/system/core/Exceptions.php:185)

调整图像大小并显示而不保存

0 个答案: