Fibonacci demo

gistfile1.php

#!/usr/bin/php
<?php

define('GOAL', 30);

function fibonacciV1($n = 0) {
    if(!$n)         : return 0;
    elseif ($n < 3) : return 1;
    else            : return fibonacciV1($n-1) + fibonacciV1($n-2);.
    endif;

    return 1;
}

function fibonacciV2($n = 0) {
    $current = 3;
    $fibTemp = array(0, 1, 1);

    if($n < 3): return $fibTemp[$n]; endif;

    while($current <= $n) {
        $fibTemp[$current] = $fibTemp[$current-1] + $fibTemp[$current-2];
        $current++;
    }

    return $fibTemp[$current-1];
}

# Main routine
print ">> Fibonacci DEMO\n";

$start = microtime(true);
print "V1 | F(" . GOAL . ") = " . fibonacciV1(GOAL) . "\n";
$end = microtime(true);
print "V1 | " . ($end - $start) . " seconds\n";

$start = microtime(true);
print "V2 | F(" . GOAL . ") = " . fibonacciV2(GOAL) . "\n";
$end = microtime(true);
print "V2 | " . ($end - $start) . " seconds\n";

print ">> Have a nice day!\n";