There seems to be some incomplete information in an image file that was extracted from the MSSQL database

I am facing an issue where I am unable to display the full image stored in the Image field of the database. Currently, only a partial image of 63KB is being displayed.

Here is the code I am using:

$sql='SELECT Photo FROM Personel WHERE ID_USER = '.$id;

$result=mssql_query($sql);

$res=mssql_fetch_assoc($result);

header('Content-type:image/jpeg');
echo $res['Photo'];

At first glance, there doesn't seem to be anything unusual about the code. Therefore, I suspect that the problem lies either with the database or the server configuration.

The database is installed on a Windows XP server.

In this case, it is worth mentioning that the database belongs to the Access control systems program and the SQL files are installed within its folder. However, it remains uncertain whether this information is relevant to solving the issue.

Do you have any insights or suggestions to resolve this problem?

UPDATE Please refer to the screenshot below for the Photo field type:

phpsql-serverimage

Answer №1

section, an individual mentioned encountering a similar issue and suggested running the following command beforehand: 
mssql_query('SET TEXTSIZE 10000000'); // this action establishes a size limit of 10MB

Answer №2

It's possible that the data type you are currently using for the Photo field is not suitable for storing the size of images you want to save. Each data type has its own limitations regarding the amount of data it can store in a specific field.

To understand different field types and their storage capacity/suitability, refer to this page in the MySQL documentation.

For example, the blob type has a maximum limit of 2^16 bytes (64K).

If your images exceed this limit (which is quite likely), consider changing the field type to something like mediumblob (2^24 = 16.78MB).

In case you're dealing with extremely large images, you might need to use longblob (2^32 = 4.29 GB). However, at that point, you will encounter more than just storage-related issues :)

Answer №3

Verify if there are any restrictions on the Photo field.

Answer №4

Considering your comments indicate that the complete image is being stored in the database, there is a possibility that the issue might be associated with a data limit or timeout within PHP and/or the webserver.

EDIT: For historical reference and to demonstrate our attempted solutions, I have retained the following part of the answer. However, please refer to the comments below as it seems more likely that the problem pertains to a PHP or webserver configuration setting that restricts the size of the response data. We have not yet fully resolved this.

I've observed that you have a Content-type header but no Content-length header.

You can try adding a Content-length header with an arbitrary known value (such as 12288) to see if this affects the file size returned (considering its current size is 63K - does it change to 12K?).

If it does, then you will need to make PHP calculate or determine the actual size of your image and add a Content-length header with that specific length.

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