PHP: Show JPG from Binary

Question

I have a jpg blob thats been stored in an external DB and I'm looking to display that as an image via php. The issue is whenever I set the Content-Type to image/jpeg and echo out the blob I get the broken image icon when browsing to it.

I have tried making the file from scratch via sublime and that works when I save it as a hexadecimal file so I know the data is valid.

I have tried making the script create a file but it sets the charset=us-ascii so it won't get seen as a image file.

Does anyone have any experience with raw image binary files? anyone know how I can display the image or even save it out to a file?

Thanks in advance.

P.S. I would provide the binary but its just too big to put on here.

EDIT: (added some code)

<?php
header('Content-Type: image/jpeg;');

$data = 'some long string of hex';


// tried echoing it directly..
echo $data;

// and writing to a file...
file_put_contents('test.jpg', $data);
?>

@Dagon Done... Not sure how much help that is.

Aaran McGuire
– Aaran McGuire

2013-09-22 23:15:30 +00:00
Commented Sep 22, 2013 at 23:15 — Aaran McGuire
– Aaran McGuire, Commented Sep 22, 2013 at 23:15

Community · Accepted Answer · 2017-05-23 12:22:48Z

1

After continuing research I found this post PHP: create file from an HEX string

With the following code I fixed the issue.

<?php
header('Content-Type: image/jpeg;');

$data = 'The hex data';

$data = pack('H*',$data);

$im = imagecreatefromstring($data);

imagejpeg($im);

?>

edited May 23, 2017 at 12:22

CommunityBot

11 silver badge

answered Sep 22, 2013 at 23:30

Aaran McGuire

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Comments

Wpigott · Accepted Answer · 2013-09-22 23:14:46Z

0

Try $im = imagecreatefromstring($data); The output it by imagejpeg($im);

answered Sep 22, 2013 at 23:14

Wpigott

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1 Comment

Wpigott Over a year ago

You likely need to convert the binary string to a char string using a function like $data = unpack('H',$data); prior to creating the image.

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