What are common pitfalls or errors that could lead to a red light error in a MySQL program in PHP?

A common pitfall that could lead to a red light error in a MySQL program in PHP is using incorrect SQL syntax or not properly handling errors in the query execution. To solve this issue, make sure to double-check your SQL statements for any syntax errors and implement error handling to catch any issues that may arise during query execution.

// Corrected code with error handling
$query = "SELECT * FROM users WHERE id = 1";
$result = mysqli_query($connection, $query);

if (!$result) {
    die('Error: ' . mysqli_error($connection));
}

// Process the query result
while ($row = mysqli_fetch_assoc($result)) {
    // Do something with the data
}

mysqli_free_result($result);
mysqli_close($connection);