How can PHP developers efficiently handle and troubleshoot MySQL query errors?

To efficiently handle and troubleshoot MySQL query errors in PHP, developers can use the mysqli_error() function to retrieve the error message generated by the most recent MySQL query. This allows developers to quickly identify and address any issues with their queries.

// Connect to MySQL database
$connection = mysqli_connect("localhost", "username", "password", "database");

// Perform MySQL query
$query = "SELECT * FROM table";
$result = mysqli_query($connection, $query);

// Check for errors
if (!$result) {
    echo "Error: " . mysqli_error($connection);
} else {
    // Process query results
}