How can one debug issues with displaying blob files in PHP?

To debug issues with displaying blob files in PHP, you can start by checking if the blob data is being retrieved correctly from the database. Make sure that the data is being encoded and decoded properly using functions like base64_encode and base64_decode. Additionally, ensure that the correct content type header is set when displaying the blob data in the browser.

// Retrieve blob data from the database
$blob_data = // Retrieve blob data from database query

// Decode the blob data
$decoded_blob = base64_decode($blob_data);

// Set the content type header
header("Content-type: image/jpeg");

// Display the blob data
echo $decoded_blob;