DomPDF: Image not readable or empty

问题

For some reason, DomPDF won't render an image included in the html that is being parsed:

However, the image is rendered on the page when it is returned as html:

I've looked at these issues and have make sure that DOMPDF_ENABLE_REMOTE is set to true and verified file permissions:
dompdf image not real image not readable or empty
Image error in DOMPDF for ZF2

Are there any other things that I should be checking for?

回答1:

Following helped me like charm, at least localy, and even with

def("DOMPDF_ENABLE_REMOTE", false);

The solution is to change the image SRC to the absolute path on the server, like this:

<img src="/var/www/domain/images/myimage.jpg" />

All of the following worked for me:

<img src="<?php echo $_SERVER["DOCUMENT_ROOT"].'/placeholder.jpg';?>"/>
<img src="<?php echo $_SERVER["DOCUMENT_ROOT"].'\placeholder.jpg';?>"/>
<img src="<?php echo $_SERVER["DOCUMENT_ROOT"].'./placeholder.jpg';?>"/>

$_SERVER["DOCUMENT_ROOT"] is C:/wamp/www/ZendSkeletonApplication/public

Thanks to this: lost in code

回答2:

Ok I had the same problem with image using :

<img id="logo" src="/images/flags/fr.png" width="50" alt="Logo">

But if I add a . before /images, without changing anything in dompdf_config.custom.inc, it works

<img id="logo" src="./images/flags/fr.png" width="50" alt="Logo">

Hope it helps

回答3:

As there was another answer that suggests enabling the remote option in module.config.php and I can't yet add comments, I thought it would be best to answer that this file does not exist in newer versions of DomPDF.

If you need to include remotely stored images in a newer version you have to pass it as an option to the constructor:

$dompdf = new Dompdf(array('enable_remote' => true));

This fixed the issue I had.

回答4:

Now (May 2018) the correct way is :

$options = new Options();
$options->set('isRemoteEnabled',true);      
$dompdf = new Dompdf( $options );

回答5:

In path :

vendor/dino/dompdf-module/config/module.config.php

change settings

enable_remote' => false,

то true.

回答6:

None of the solutions here worked for me. Instead I just base64 encoded the image and then it worked. You can use this tool.

回答7:

I solve this problem by using external CSS's full path. This one worked on my linux ubuntu server :

<link href="{{ public_path('css/style.css') }}" />

<img src="{{ public_path('images/image.jpg') }}" />

and work on image.

回答8:

For our use case we had to convert all the images on the page to base64 since the pdf should be usable offline. Our code lives inside a controller class but you can modify that to your needs.

Here's the code:


    /**
     * Convert images to Base64 so it's included in the PDF.
     *
     * @param $html  Full html render of the page.
     */
    public function convertReportImagesToURI($html): string
    {
        $doc = new DOMDocument();
        libxml_use_internal_errors(true);
        $doc->loadHTML($html);
        $tags = $doc->getElementsByTagName('img');
        $imgArr = array();

        // Iterate over all image tags.
        foreach ($tags as $tag) {
            // Get the src attribute.
            $imgSrc = $tag->getAttribute('src');

            // Convert to base64.
            $base64src = self::getImageDataURI($imgSrc);
            $tag->setAttribute('src', $base64src);
        }
        return $doc->saveHTML();
    }

    /**
     * This does the actual encoding.
     */
    public static function getImageDataURI($image, $mime = ''): string
    {
        // Director::absoluteURL('/') gets the base url of the site.
        // We had to remove the leading slash of the image hence the use of substr.
        // If your images have absolute urls you will need to modify this.
        $imageLocation = Director::absoluteURL('/') . substr($image, 1);
        // Get the image location. remove leading slash on image url.
        return 'data:' . self::get_image_mime_type($imageLocation) . ';base64,' . base64_encode(file_get_contents($imageLocation));
    }

    /**
     * https://stackoverflow.com/a/45054843
     * @param $image_path
     * @return string
     */
    public static function get_image_mime_type($image_path): string
    {
        $mimes  = array(
            IMAGETYPE_GIF => "image/gif",
            IMAGETYPE_JPEG => "image/jpg",
            IMAGETYPE_PNG => "image/png",
            IMAGETYPE_SWF => "image/swf",
            IMAGETYPE_PSD => "image/psd",
            IMAGETYPE_BMP => "image/bmp",
            IMAGETYPE_TIFF_II => "image/tiff",
            IMAGETYPE_TIFF_MM => "image/tiff",
            IMAGETYPE_JPC => "image/jpc",
            IMAGETYPE_JP2 => "image/jp2",
            IMAGETYPE_JPX => "image/jpx",
            IMAGETYPE_JB2 => "image/jb2",
            IMAGETYPE_SWC => "image/swc",
            IMAGETYPE_IFF => "image/iff",
            IMAGETYPE_WBMP => "image/wbmp",
            IMAGETYPE_XBM => "image/xbm",
            IMAGETYPE_ICO => "image/ico");

        if (($image_type = exif_imagetype($image_path))
            && (array_key_exists($image_type, $mimes))) {
            return $mimes[$image_type];
        } else {
            return '';
        }
    }

回答9:

You can use base64 encoded image

<img src="{{'data:image/png;base64,' . base64_encode(file_get_contents(@$image))}}" alt="image" >

来源：https://stackoverflow.com/questions/25558449/dompdf-image-not-readable-or-empty

标签

php

html

pdf

laravel

dompdf