How can PHP be used to interact with databases like MySQL and PostgreSQL to retrieve the last ID?

To retrieve the last ID inserted into a database table using PHP, you can use the mysqli_insert_id() function for MySQL databases or the pg_last_oid() function for PostgreSQL databases. These functions return the ID of the last inserted row in the specified database connection.

// For MySQL
$last_id = mysqli_insert_id($connection);

// For PostgreSQL
$last_id = pg_last_oid($result);