What are the best practices for handling non-sequential IDs in a MySQL table when trying to fetch related images in PHP?

When dealing with non-sequential IDs in a MySQL table for related images, it is best to use a separate column to establish the relationship between the images and the main entity. This can be achieved by creating a foreign key in the images table that references the primary key of the main entity. Then, when fetching related images in PHP, you can use a JOIN query to retrieve the images based on the foreign key. 

// Assuming you have a main entity table called 'main_entity' with a primary key 'id'
// and an images table with a foreign key 'main_entity_id' referencing 'main_entity.id'

// Fetch related images for a specific main entity ID
$main_entity_id = 1;

$sql = "SELECT images.* 
        FROM images 
        JOIN main_entity ON images.main_entity_id = main_entity.id 
        WHERE main_entity.id = :main_entity_id";

$stmt = $pdo->prepare($sql);
$stmt->bindParam(':main_entity_id', $main_entity_id, PDO::PARAM_INT);
$stmt->execute();

$related_images = $stmt->fetchAll(PDO::FETCH_ASSOC);

// Use $related_images array to display or process the related images

Keywords

PHP MySQL non-sequential IDs related images handling

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