How Can I Successfully Insert Image Blobs into a MySQL Database Using PHP?

Insert Blobs in MySql Databases with PHP

Problem Overview

You're trying to store an image in a MySQL database using PHP, but it's not working as expected. The image data is not being inserted into the database.

Solution

Check for Variable Interpolation Issue

In your query, you're using the file_get_contents() function to retrieve the image data, but you're not explicitly concatenating its result to the query string. As a result, the query contains the string "file_get_contents($tmp_image)" instead of the actual image data.

Solution 1: Explicit Concatenation

To concatenate the image data properly, you need to jump out of the string and do things explicitly:

$sql = "INSERT INTO ImageStore(ImageId,Image)
        VALUES('$this->image_id','" . file_get_contents($tmp_image) . "')";

Handle Sanitization

If the binary image data contains any apostrophes ('), it can break the SQL query. To prevent this, you should run the data through the mysql_escape_string function for sanitization:

$sql = "INSERT INTO ImageStore(ImageId,Image)
        VALUES('$this->image_id','" . mysql_escape_string(file_get_contents($tmp_image)) . "')";

Consider Alternative Storage

Storing large binary data (such as images) in MySQL databases can make them bulky. If possible, consider using a separate file storage system for images.

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