How Can I Efficiently Use Prepared Statements with Array Filters in MySQL's `WHERE ... IN()` Clause?

Prepared Statement with Array Filter: 'WHERE .. IN(..)' Query

Problem

Consider the following query that retrieves rows based on specific IDs:

SELECT * FROM somewhere WHERE `id` IN(1,5,18,25) ORDER BY `name`;

Given an array of IDs ($ids) to fetch, it's recommended to use prepared statements for efficiency. However, using a loop to iterate over the array and bind each ID separately requires subsequent manual sorting of results.

Solution

To simplify this process and maintain MySQL ordering, an alternative approach exists:

$ids = array(1,5,18,25);

// Construct a placeholder string containing ?,?,? etc.
$clause = implode(',', array_fill(0, count($ids), '?'));

$stmt = $mysqli->prepare('SELECT * FROM somewhere WHERE `id` IN (' . $clause . ') ORDER BY `name`;');

// Bind all IDs to the placeholder string using call_user_func_array
call_user_func_array(array($stmt, 'bind_param'), $ids);
$stmt->execute();

// Iterate over the results

This method binds all IDs to the placeholder string in one call, allowing MySQL to perform the filtering and sorting efficiently.

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