php time a script

1//place this before any script you want to calculate time
2$time_start = microtime(true); 
3
4//sample script
5for($i=0; $i<1000; $i++){
6 //do anything
7}
8
9$time_end = microtime(true);
10$execution_time = ($time_end - $time_start);
11echo '<b>Total Execution Time:</b> '.($execution_time*1000).'Milliseconds';
12

1<?php
2$startTime = microtime(true);
3
4/*stuff is going on*/
5
6echo "Elapsed time is: ". (microtime(true) - $startTime) ." seconds";