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<?PHP
	function microtime_float()
	{
		list($usec, $sec) = explode(" ", microtime());
		return ((float)$usec + (float)$sec);
	}
		
    	$time_start = microtime_float();
		    //any function here
	$time_end = microtime_float();
	$time = $time_end - $time_start;
	echo "$time taken.";
?>