- array_sum: documentation ( source)
- microtime: documentation ( source)
- round: documentation ( source)
- explode: documentation ( source)
<?php
$start = microtime(1);
for($i = 0; $i < 1000; $i++) {
$b = $i;
}
echo round(array_sum(explode(' ', microtime())) - array_sum(explode(' ', $start)), 3);