Exection time of php script

Question

is there any function in php through which we can fast the execution time of php script

Answer 1

Assuming PHP 5 you can compute duration in seconds (with millisecond accuracy) as:

<?php
  $start = microtime(true);

  // code

  $duration = microtime(true) - $start;
?>

Further reading in the PHP manual.

Answer 2

Or, if you use xdebug (which I recommend), xdebug_time_index()