Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, …
By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
fibo.php
<?php
$i = 0;
$j = 1;
$k = 1;
$total = 0;
while($k < 4000000){
$i = $j;
$j = $k;
$k = $i + $j;
if($k % 2 == 0){
$total += $k;
}
}
echo $total;
?>