Are there any specific functions or techniques in PHP that can help optimize script execution time?

One way to optimize script execution time in PHP is to use functions like `microtime()` to measure the time taken by different parts of the script. By identifying bottlenecks, you can focus on optimizing those specific areas. Additionally, techniques like caching, using efficient algorithms, and minimizing database queries can also help improve script performance.

$start_time = microtime(true);

// Your PHP script code here

$end_time = microtime(true);
$execution_time = $end_time - $start_time;
echo "Script execution time: $execution_time seconds";