In the context of updating database records in PHP, what are some common reasons for scripts running successfully multiple times before encountering errors, and how can these issues be troubleshooted effectively?

One common reason for scripts running successfully multiple times before encountering errors in updating database records in PHP is due to improper error handling. To troubleshoot effectively, ensure that error reporting is enabled and check for any error messages or warnings that may provide insight into the issue. Additionally, verify the connection to the database and the SQL query being executed for any potential mistakes.

// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Check for errors in the SQL query
$result = mysqli_query($conn, $sql);
if (!$result) {
    die('Error: ' . mysqli_error($conn));
}

// Verify the connection to the database
if (!$conn) {
    die('Connection failed: ' . mysqli_connect_error());
}