How to calculate time required by PHP file to open using wget?

I want to find out the time required by a php file to open(download) inside a Perl script.开发者_开发技巧 I want to use wget here.

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You could use microtime to calculate the time:

/**
 * Simple function to replicate PHP 5 behaviour
 */
function microtime_float()
{
    list($usec, $sec) = explode(" ", microtime());
    return ((float)$usec + (float)$sec);
}

$time_start = microtime_float();

// do stuff

$time_end = microtime_float();
$time = $time_end - $time_start;

echo "Execution time was $time seconds\n";