Store image data type using PHP

I have an SQL Server database with following table.

Table PROMO, column:

• code , varchar(10)
• name开发者_JAVA技巧 , varchar(10)
• image_data, image
• desc , text

How do I insert an image file as a binary into SQL Server using PHP PDO? The image will be stored in column image_data.

What type of variable should I pass to the PDO parameter?

$stmt = $conn->prepare($query, array(
    ':code'        => $code,
    ':name'        => $name,
    ':image_data'  => $imageData,
    ':desc'        => $desc
));

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Exactly the same way as you store any other data, text for example. There is no difference.