Re: Division by 0

Looks to me like you are closing your form before you put anything in it. Therefore, the loan_amount is not set making the value 0. Follow the math, and you are dividing by 1-1. Change this line: <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post"></form> to: <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post"> and you should be good to go. Joseph Gary wrote:

I have a mortgage amortization script that was working fine,now it seems to have gone awry. Below is the entire script plus input page. I am getting an error Warning: Division by zero in /home/content/J/a/y/Jayski/html/one2one/Ricksrecursivefunctions.php on line 47 Which is (pow($intCalc,$totalPayments) - 1); Frankly I am not even sure the information is being passed to the script. Anyone see what I am missing? Gary <div id="onecol">Calculate your Loan</div> <div id="leftcontent"> <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post"></form> <table> <tr>

      <td style="background-color:#B1D8D8" width="110px">Loan Amount</td>
        <td><input name="loan_amount" type="text" size="25" /> USD</td>
        <td><a href="javascript:void(0);"  onmouseover="Tip('This is the amount of money to be loaned.')" onmouseout="UnTip()"><img src="images/help.png" class="noborder"/></a></td>

</tr> <tr>

      <td style="background-color:#B1D8D8" width="110px">Type of Loan</td>
      <td>

<select name="type" size="1" id="type"> <option>Installment</option> <option>Balloon</option> </select></td> <td><a href="javascript:void(0);" onmouseover="Tip('This is the method of repayment.')" onmouseout="UnTip()"><img src="images/help.png" class="noborder"/></a></td> </tr> <tr>

     <td style="background-color:#B1D8D8" width="100px">Term of Loan</td>
        <td><input name="loan_term" type="text" size="5" />

</select>Months</td> <td><a href="javascript:void(0);" onmouseover="Tip('This is the amount of time that the money is loaned for.')" onmouseout="UnTip()"><img src="images/help.png" class="noborder" /></a></td>

        </tr>
     <tr>
     <td style="background-color:#B1D8D8" width="140px">Interest Rate</td>
        <td><input name="int_rate" type="text" size="10" /> Per Annum</td><td><a href="javascript:void(0);"  onmouseover="Tip('Percentage (%) charged on loan on an annual basis. <br />Please see our FAQs for information on usury rates. <br />If no amount is entered this will be 0%.')" onmouseout="UnTip()"><img src="images/help.png" class="noborder" /></a></td>
        </tr>

</table> <label> <input type="submit" name="submit" id="submit" value="submit" />

    </label>

</form> <?php function amortizationTable($paymentNum, $periodicPayment, $balance,

                           $monthlyInterest) {
    $paymentInterest = round($balance * $monthlyInterest,2);
    $paymentPrincipal = round($periodicPayment - $paymentInterest,2);
    $newBalance = round($balance - $paymentPrincipal,2);
    print "<tr>
           <td>$paymentNum</td>
           <td>\$".number_format($balance,2)."</td>
           <td>\$".number_format($periodicPayment,2)."</td>
           <td>\$".number_format($paymentInterest,2)."</td>
           <td>\$".number_format($paymentPrincipal,2)."</td>
           </tr>";
     # If balance not yet zero, recursively call amortizationTable()
     if ($newBalance > 0) {
        $paymentNum++;
        amortizationTable($paymentNum, $periodicPayment, $newBalance,
                          $monthlyInterest);
     } else {
        exit;
     }

} #end amortizationTable() # Loan balance $balance =($_POST['loan_amount']); # Loan interest rate $interestRate = ($_POST['int_rate']); # Monthly interest rate $monthlyInterest = ("$interestRate / 12"); # Term length of the loan, in years. $termLength =($_POST['loan_term']); # Number of payments per year. $paymentsPerYear = 12; # Payment iteration $paymentNumber =($_POST['loan_term']); # Perform preliminary calculations $totalPayments = $termLength * $paymentsPerYear; $intCalc = 1 + $interestRate / $paymentsPerYear; $periodicPayment = $balance * pow($intCalc,$totalPayments) * ($intCalc - 1) /

                                    (pow($intCalc,$totalPayments) - 1);

$periodicPayment = round($periodicPayment,2); # Create table echo "<table width='50%' align='center' border='1'>"; print "<tr>

          <th>Payment
    Number</th><th>Balance</th>
          <th>Payment</th><th>Interest</th><th>Principal</th>
          </tr>";

# Call recursive function amortizationTable($paymentNumber, $periodicPayment, $balance, $monthlyInterest); # Close table print "</table>"; ?> </div> __________ Information from ESET Smart Security, version of virus signature database 4932 (20100310) __________ The message was checked by ESET Smart Security. http://www.eset.com