How can PHP developers effectively utilize functions like register_shutdown_function() for browser monitoring?

To effectively utilize functions like register_shutdown_function() for browser monitoring, PHP developers can use this function to register a callback that will be executed when the script finishes executing, allowing them to track the script's execution time, memory usage, errors, or any other relevant information.

register_shutdown_function(function() {
    $executionTime = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];
    $memoryUsage = memory_get_peak_usage(true);
    
    // Log or output the execution time and memory usage
    echo "Execution time: " . $executionTime . " seconds\n";
    echo "Memory usage: " . $memoryUsage . " bytes\n";
});