dqwh1219 2016-07-06 12:16
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PHP SLIM:如何返回动态生成的图像

I am trying to display a dynamically generated image from SLIM controller but I am getting a blank screen. Thanks.

public function textToImage($request, $response, $args) {

    // The text to draw
    $text = "Hello World";
    $length=strlen($text);
    // Create the image

    $im = imagecreatetruecolor($length*12, 30);

    // Create some colors
    $white = imagecolorallocate($im, 255, 255, 255);
    $grey = imagecolorallocate($im, 128, 128, 128);
    $black = imagecolorallocate($im, 44, 62, 80);
    $boxcolor=imagecolorallocate($im, 95, 128, 149);

    $font = 'Helvetica.ttf';
    imagefilledrectangle($im, 0, 0, $length*9+$capitaladjust, 29, $white);
    imagettftext($im, 13, 0, 0, 20, $black, $font, $text);

    $response->getBody()->write(base64_encode($im));
    $response = $response->withHeader('Content-type', 'image/png');     
    return $response;
 }
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1条回答 默认 最新

  • dsfsd43523 2016-07-06 13:07
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    base64 encoding $im will not create a valid PNG file. Try using imgpng and then sending the raw contents of the PNG file that it creates.

    The code would look something like this:

    ob_start();
    imagepng($im);
    $data = ob_get_contents();
    ob_end_clean();
    
    $response->getBody()->write($data);
    $response = $response->withHeader('Content-type', 'image/png');     
    return $response;
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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