What potential pitfalls could arise when using the mysql_insert_id() function in PHP?

When using the mysql_insert_id() function in PHP to retrieve the last inserted auto_increment ID, potential pitfalls could arise if multiple database connections are being used simultaneously. This could result in the function returning the ID from a different insert operation than intended. To avoid this issue, it is recommended to use the mysqli_insert_id() function instead, as it is specific to the MySQLi extension and is connection-specific. 

// Connect to the database using MySQLi
$mysqli = new mysqli("localhost", "username", "password", "database");

// Check connection
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}

// Perform insert query
$mysqli->query("INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2')");

// Get the last inserted ID
$last_id = $mysqli->insert_id;

// Close the connection
$mysqli->close();

// Use the last inserted ID as needed
echo "Last inserted ID: " . $last_id;

Keywords

mysql_insert_id PHP database auto-increment concurrency

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