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PHP-Imagemagick image display

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猫巷女王i
猫巷女王i 2020-12-05 20:36

I have php code which create pdf thumbnail as follows;

setImageFormat(\"png
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7条回答
  • 梦如初夏
    2020-12-05 21:04

    With Imagick, you could use base64 encoding: 

    echo '<img src="data:image/jpg;base64,'.base64_encode($img->getImageBlob()).'" alt="" />';`

    However, this method is kind a slow and therefore I recommend generating and saving the image earlier $img->writeImage($path).

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  • 一生所求
    2020-12-05 21:05

    you can try to display the image by this way:

    // start buffering
ob_start();
$thumbnail = $im->getImageBlob();
$contents =  ob_get_contents();
ob_end_clean();

echo "<img src='data:image/jpg;base64,".base64_encode($contents)."' />";
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  • 春和景丽
    2020-12-05 21:05

    As I can see there are too many answers which are not accurate enough, so here goes mine:

    This will print the image as you are doing it now(by the time of asking this question). As alternative to answer by @Vasil Dakov you should modify the snippet i gave you like this:

    <?php
// ... Image generation goes here
header("Content-Type: image/jpeg"); 
ob_start();
print $im->getImageBlob();
$the_outputted_image = ob_get_flush();
?>
// Assuming that you use MVC approach and you are storing $the_outputted_image in a object and passing it to the view(ie. index.html or the HTML below the code).
//... Html code of index.html
<img src="data:image/jpg;base64 <?php print $the_outputted_image; ?>" alt="image" title="IMagick Generated Image" />

    As another alternative is creating a script to generate the image, save it in some folder ( assuming img/ is the folder) and return only the path+filename+ extension to the file:

    <?php
// ... Image generation goes here
header("Content-Type: image/jpeg"); 
$filename = 'img/' . md5(microtime()) . '.jpg'// Microtime is just as an example, you should use your own method.
$fp = fopen($filename, "x"); //Creating and opening the file for write-only  
$im->writeImageFile($fp); //Writing the image to the file pointer (I would recommend writing it using, fwrite(), because it is binary-safe writing method)
fclose($fp);
?>

// Html
<img src="<?php print $filename; ?>" alt="image" title="IMagick Generated Image" />

    documentation for Imagick::writeImageFile

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  • 忘掉有多难
    2020-12-05 21:07

    The only solution would be to convert your image to base64 and include it as an embedded base64 image (data:image/png;base64, ). Further reference.

    But this isn't supported in IE 6 and 7.

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  • [愿得一人]
    2020-12-05 21:14

    In my case I found out a solution like this:

                $im = new Imagick("http://www.yourserver.com/upload/file_name.pdf");
            $im->setResolution(300, 300);     // if higher image will be good to read
            $im->setIteratorIndex(0); // read first page
            $im->setImageFormat('jpg');
            header('Content-Type: image/jpeg');

            ob_start();
            print $im->getImageBlob(); 
            $contents =  ob_get_contents();
            ob_end_clean();

            echo "<img src='data:image/jpg;base64,".base64_encode($contents)."' />"; //output as image

    good luck.

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  • 死守一世寂寞
    2020-12-05 21:23

    Embedding an image using base64 is a COMPLETELY wrong way to go about the problem esp. with something stateless like a php web script.

    You should instead use http parameters to have a single php file which can perform two tasks - the default will send html , and the parameter will instruct the php file to print the image. Below is the "standard" way to do it -

    <?php
if (!array_key_exists('display',$_GET))
{
    print('<html><head></head><body><img src="'.$_SERVER['PHP_SELF'].'?display=image"></body></html>');
} else
{
    // The display key exists which means we want to display an image
    $file ="test.pdf";
    $im = new imagick(realpath($file).'[0]');
    $im->setImageFormat("png");
    $im->resizeImage(200,200,1,0);
    header("Content-Type: image/jpeg");
    $thumbnail = $im->getImageBlob();
    echo $thumbnail;
}
?>
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