How to use imagemagick properly on bluehost?

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I have a pdf file that I want to convert its first page to jpg. Here is the code:

PHP

<?php
$file = $_SERVER['DOCUMENT_ROOT'].'/pdf/7a41272307d844006ce1d07db8ee951e_PRO 1.pdf';

$im = new \Imagick($file);
$im->setIteratorIndex(0); // just use first page
$im->setImageAlphaChannel(\Imagick::VIRTUALPIXELMETHOD_WHITE); // Other alpha options are available, see Imagick PHP documentation
$im->setImageColorspace(\Imagick::COLORSPACE_SRGB); // Other colorspaces are available, see Imagick PHP documentation
$im->setImageBackgroundColor('white'); // Set transparent background elements to this color
$im->setFormat('JPG'); // Format, a wide variety is supported
$im->scaleImage(350, 350, true); // WxH + force aspect (true/false)

// To just output the raw image data to browser:
echo $im;

$im->destroy();
?>

But I am getting:
��JFIFHH�� ICC_PROFILE mntrRGB XYZ acspAPPL��- desc�|cprtx(wtpt�bkpt�rXYZ�gXYZ�bXYZ�rTRCgTRCbTRCdesc"Artifex Software sRGB ICC Profile"Artifex Software sRGB ICC ProfiletextCopyright Artifex Software 2011XYZ �Q�XYZ XYZ o�8��XYZ b��XYZ $��curv #(-27;@EJOTY^chmrw|�� %+28>ELRY`gnu|��&/8AKT]gqz��!-8COZfr~�� -;HUcq~�� +:IXgw��'7HYj{��+=Oat��2FZn�� % : O d y � � � � � � ' = T j � � � � � �"9Qi��*C\u�� & @ Z t � � � � �.Id�� %A^z�� &Ca~��1Om��&Ed��#Cc��'Ij��4Vx��&Il��Ae

What I have tried:

How can I fix this issue? Why I am getting these weird icons?

Posted 2-Jun-23 20:58pm

FRS4002

Updated 4-Jun-23 22:07pm

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Comments

Richard MacCutchan 3-Jun-23 4:04am

You are trying to display an image (i.e. binary) file as text. What do you expect?

FRS4002 3-Jun-23 4:08am

No I have a PDF file, and I want to convert the first page only to a JPG thumbnail... I also tried using

<img src="<?=$im;?>">

but I am getting the same result...

Richard MacCutchan 3-Jun-23 4:36am

Of course you are getting the same result; read my previous comment again.

FRS4002 3-Jun-23 4:40am

Sorry, but I don't understand what should I do...

Richard MacCutchan 3-Jun-23 4:44am

Check that imagemagick code you are using can successfully do what you want. Have you checked that all the commands are correct according to the documentation? As far as I can see the data you are displaying has not been converted.

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Richard Deeming · Accepted Answer · 2023-06-04T22:07:00

Solution 1

You're trying to display the raw bytes of an image inline within an HTML file. That won't work.

You'll either need a separate endpoint to generate the thumbnail, and reference that as your image source:

HTML

<img src="getPdfThumbnail.php">

Or convert the data to Base64, and use a data: URI:

PHP

echo '<img src="data:image/jpeg;base64,' . base64_encode($im) . '">';

Data URLs - HTTP | MDN[^]

Posted 4-Jun-23 22:07pm

Richard Deeming

Updated 4-Jun-23 22:27pm

v2

Comments

FRS4002 5-Jun-23 4:25am

Both methods didn't work... They both displayed an empty image... But the second method gave me this long thing:

<img src="image/jpeg;base64,/9j/4AAQSkZJRgABAQAASABIAAD/4gogSUNDX1BST0ZJTEUAAQEAAAoQAAAAA">

The code of course is larger than that... How to fix this issue?

Richard Deeming 5-Jun-23 4:28am

The "big long thing" is a Base64-encoded version of the image bytes. There's no way to "fix" that short of using a separate PHP file to generate the thumbnail, as per my first suggestion.

NB: I missed off the data: prefix for the data URI; try adding that in to see if you get an image.

FRS4002 5-Jun-23 4:31am

It worked! Thanks!