PHP::Measue php scripts execution time

exectime.php

<?php

function getTime() 
    { 
    $a = explode (' ',microtime()); 
    return(double) $a[0] + $a[1]; 
    } 

$Start = getTime(); 
$End = getTime(); 
echo "Time taken = ".number_format(($End - $Start),2)." secs"; 
?>