PHP：从Binary显示JPG [英] PHP: Show JPG from Binary

问题描述

我有一个存储在外部数据库中的jpg blob，我希望通过php将其显示为图像。问题是每当我将 Content-Type 设置为 image / jpeg 并回显blob时，我得到了破碎的图像浏览它时的图标。

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.

我尝试通过sublime从头开始制作文件，当我将其保存为十六进制文件时可以正常工作，因此我知道数据有效。

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.

我试过让脚本创建一个文件但它设置了 charset = us-ascii 所以它赢了被视为图像文件。

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.

有没有人对原始图像二进制文件有任何经验？有谁知道如何显示图像甚至将其保存到文件中？

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?

提前致谢。

PS我会提供二进制文件，但它太大而无法放在这里。

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

(添加了一些代码）

<?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);
?>

推荐答案

继续研究后我发现这篇文章PHP：从HEX字符串创建文件

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

使用以下代码修复了问题。

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);

?>

这篇关于PHP：从Binary显示JPG的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！