How does the LAST_INSERT_ID function in MySQL address the problem of retrieving the correct ID value for each connection when multiple users are inserting data simultaneously in PHP?

When multiple users are inserting data simultaneously in PHP, there is a risk of retrieving the incorrect ID value for each connection. To address this problem, MySQL provides the LAST_INSERT_ID function, which returns the ID generated for the most recent AUTO_INCREMENT column. By using this function immediately after an INSERT query, we can ensure that each user gets the correct ID value for their specific connection. 

// Perform an INSERT query
mysqli_query($conn, "INSERT INTO table_name (column_name) VALUES ('value')");

// Retrieve the last inserted ID for the current connection
$last_insert_id = mysqli_insert_id($conn);

// Use the $last_insert_id as needed
echo "The last inserted ID is: " . $last_insert_id;

Keywords

LAST_INSERT_ID MySQL PHP multiple users simultaneous data insertion

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