What are some common pitfalls when using set_error_handler() in PHP?

One common pitfall when using set_error_handler() in PHP is forgetting to restore the previous error handler after handling the error. This can lead to unexpected behavior in other parts of the code that rely on the default error handling. To solve this issue, it is important to store the previous error handler before setting a custom one and then restore it after handling the error.

// Store the previous error handler
$previousErrorHandler = set_error_handler("customErrorHandler");

// Custom error handler function
function customErrorHandler($errno, $errstr, $errfile, $errline) {
    // Handle the error here
}

// Restore the previous error handler
set_error_handler($previousErrorHandler);