What are the best practices for accurately measuring and displaying script execution times in PHP?

Measuring and displaying script execution times in PHP can be achieved by using the microtime() function to capture the start and end times of the script, calculating the difference between them, and then displaying the result. It's important to ensure accurate measurements by minimizing interference from external factors and repeating the measurement multiple times to get an average.

// Start time
$start_time = microtime(true);

// Your PHP script code here

// End time
$end_time = microtime(true);

// Calculate execution time
$execution_time = $end_time - $start_time;

// Display execution time
echo "Script execution time: " . $execution_time . " seconds";