How can one effectively debug SQL errors in PHP scripts?

To effectively debug SQL errors in PHP scripts, one can use the mysqli_error() function to display the error message generated by the most recent MySQLi function call. This can help identify the specific SQL query or database operation that is causing the error. Additionally, checking for syntax errors, ensuring proper connection to the database, and validating input data can also help prevent SQL errors in PHP scripts.

// Example code snippet to debug SQL errors in PHP scripts
$conn = mysqli_connect("localhost", "username", "password", "database");

if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

$sql = "SELECT * FROM users WHERE id = 1";
$result = mysqli_query($conn, $sql);

if (!$result) {
    echo "Error: " . mysqli_error($conn);
} else {
    // Process the query result
}

mysqli_close($conn);