How to Use an Array with MySQLi Prepared Statements in an `IN()` Clause?

How to Incorporate an Array into a MySQLi Prepared Statement for an 'IN()' Query

When executing a MySQL query that involves filtering records based on values in an array using the WHERE ... IN(...) syntax, it's recommended to use prepared statements to enhance security and performance. However, using prepared statements as shown in the question requires manual sorting of the results.

To address this, a better solution is to utilize MySQL's built-in IN() functionality within a prepared statement. This enables us to incorporate the array of IDs directly into the query.

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

// Construct a comma-separated string of placeholders
$clause = implode(',', array_fill(0, count($ids), '?'));

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

// Bind the array of IDs to the placeholders
call_user_func_array(array($stmt, 'bind_param'), $ids);
$stmt->execute();

// Iterate over the results

By using this approach, the bind_param function is called once with the entire array of IDs, and MySQL automatically handles the filtering and ordering of the results. This provides a more efficient and robust solution compared to manual sorting.

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