How can PHP developers efficiently retrieve data for the image before and after the currently displayed image in a database, especially when the image IDs are not in sequential order?

To efficiently retrieve data for the image before and after the currently displayed image in a database when the image IDs are not in sequential order, you can use SQL queries with conditions to fetch the nearest image IDs. You can order the results by the image ID and then use LIMIT and OFFSET to get the previous and next images. 

<?php
// Assuming $currentImageId is the ID of the currently displayed image
$prevImage = $db->query("SELECT * FROM images WHERE id < $currentImageId ORDER BY id DESC LIMIT 1")->fetch();
$nextImage = $db->query("SELECT * FROM images WHERE id > $currentImageId ORDER BY id ASC LIMIT 1")->fetch();

// Use $prevImage and $nextImage data as needed
?>

Keywords

PHP database retrieval non-sequential IDs image data

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