Can anybody convert this code to VFP? I Tried but I don't know where am I wrong, mine is works wrong.

/**
* Divides two integers.
*
* @param int $a Integer to divide
* @param int $b Integer to divide to
* @return int
*/
function div($a,$b) {
return (int) ($a / $b);
}

/**
* Converts gregorian to jalali calendar
*
* @param int $g_y The gregorian year
* @param int $g_m The gregorian month
* @param int $g_d The gregorian day
* @return array The jalali date array
*/
function gregorian_to_jalali($g_y, $g_m, $g_d) {
$g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
$j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);

$gy = $g_y-1600;
$gm = $g_m-1;
$gd = $g_d-1;

$g_day_no = 365*$gy+div($gy+3,4)-div($gy+99,100)+div($gy+399,400);

for ($i=0; $i < $gm; ++$i)
$g_day_no += $g_days_in_month[$i];
if ($gm>1 && (($gy%4==0 && $gy%100!=0) || ($gy%400==0)))
/* leap and after Feb */
$g_day_no++;
$g_day_no += $gd;

$j_day_no = $g_day_no-79;

$j_np = div($j_day_no, 12053); /* 12053 = 365*33 + 32/4 */
$j_day_no = $j_day_no % 12053;

$jy = 979+33*$j_np+4*div($j_day_no,1461); /* 1461 = 365*4 + 4/4 */

$j_day_no %= 1461;

if ($j_day_no >= 366) {
$jy += div($j_day_no-1, 365);
$j_day_no = ($j_day_no-1)%365;
}

for ($i = 0; $i < 11 && $j_day_no >= $j_days_in_month[$i]; ++$i)
$j_day_no -= $j_days_in_month[$i];
$jm = $i+1;
$jd = $j_day_no+1;

return array($jy, $jm, $jd);
}

/**
* Converts jalali to gregorian calendar
*
* @param int $j_y The jalali year
* @param int $j_m The jalali month
* @param int $j_d The jalali day
* @return array The gregorian date array
*/
function jalali_to_gregorian($j_y, $j_m, $j_d) {
$g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
$j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);

$jy = $j_y-979;
$jm = $j_m-1;
$jd = $j_d-1;

$j_day_no = 365*$jy + div($jy, 33)*8 + div($jy%33+3, 4);
for ($i=0; $i < $jm; ++$i)
$j_day_no += $j_days_in_month[$i];

$j_day_no += $jd;

$g_day_no = $j_day_no+79;

$gy = 1600 + 400*div($g_day_no, 146097); /* 146097 = 365*400 + 400/4 - 400/100 + 400/400 */
$g_day_no = $g_day_no % 146097;

$leap = true;
if ($g_day_no >= 36525) /* 36525 = 365*100 + 100/4 */
{
$g_day_no--;
$gy += 100*div($g_day_no, 36524); /* 36524 = 365*100 + 100/4 - 100/100 */
$g_day_no = $g_day_no % 36524;

if ($g_day_no >= 365)
$g_day_no++;
else
$leap = false;
}

$gy += 4*div($g_day_no, 1461); /* 1461 = 365*4 + 4/4 */
$g_day_no %= 1461;

if ($g_day_no >= 366) {
$leap = false;

$g_day_no--;
$gy += div($g_day_no, 365);
$g_day_no = $g_day_no % 365;
}

for ($i = 0; $g_day_no >= $g_days_in_month[$i] + ($i == 1 && $leap); $i++)
$g_day_no -= $g_days_in_month[$i] + ($i == 1 && $leap);
$gm = $i+1;
$gd = $g_day_no+1;

return array($gy, $gm, $gd);
}