返回动态图像zf2 [英] return dynamic image zf2

问题描述

我使用zend框架2并尝试返回使用gd2库jpeg图像创建的。但它不起作用。你看看我的代码有什么问题吗？我的代码通常使用普通的php运行但是在zf2问题中？

I use zend framework 2 and try to return an created with gd2 library jpeg image . but it doesn't work. could you look my code what's the problem? My code is run with plain php in normally but in zf2 problem?

class PictureController extends AbstractActionController
{
    public function colorPaletteAction(){

        ....
        ....
        //canvas created at above.

        imagejpeg($canvas);
        imagedestroy($canvas);
        $response = $this->getResponse();

        return $response->getHeaders()->addHeaderLine('Content-Type', 'image/jpeg');
    }
}

推荐答案

imagejpeg 立即输出你不想做的数据。您可以使用输出缓冲区来捕获此数据，也可以先将其写入文件。输出缓冲区可能最简单：

imagejpeg outputs the data immediately which you don't want to do. You can either use the output buffer to capture this data or write it to a file first. The output buffer is probably easiest:

public function colorPaletteAction()
{
    // [create $canvas]

    ob_start();
    imagejpeg($canvas);
    $imageData = ob_get_contents();
    ob_end_clean();

    imagedestroy($canvas);

    $response = $this->getResponse();

    $response->getHeaders()->addHeaderLine('Content-Type', 'image/jpeg');
    $response->setContent($imageData);

    return $response;
}

如果这不起作用，请暂时注释掉Content-Type标题行看看你得到了什么输出。确保输出中没有任何错误或HTML。

If this doesn't work, temporarily comment out the Content-Type header line to see what output you're getting. Make sure there aren't any errors or HTML in the output.

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