Display a variable based on text input and selections in php
Question
I'm currently developing a car loan calculator in PHP. The user inputs are: VEHICLE PURCHASE PRICE, DEPOSIT, INTEREST RATE, BALLOON PERCENTAGE, TERM OF LOAN (in months) and two compulsory fields.
My math works 100% and if you run my script you'll bare witness to that as I've echoed all the answers. The math is not the problem.
More often than not, a user will not complete all the fields. Here are the conditions:
- User completes all fields (
$monthlyInstallmentBoth) - User completes PURCHASE PRICE, DEPOSIT, INTEREST and TERM (Didn't select balloon) (
$monthlyInstallmentDeposit) - User completes PURCHASE PRICE, INTEREST, BALLOON and TERM (Didn't select deposit) (
$monthlyInstallmentBalloon) - User completes PURCHASE PRICE, INTEREST and TERM (Didn't select deposit or balloon) (
$mp)
Assume the variables with the above conditions:
-
$monthlyInstallmentBoth -
$monthlyInstallmentDeposit -
$monthlyInstallmentBalloon -
$mp
Here's my question: How do I display only $monthlyInstallmentBoth when all the options are selected or display only $monthlyInstallmentDeposit when a balloon percentage weren't selected or display only $monthlyInstallmentBalloon if a deposit weren't selected or display only $mp if no deposit and no balloon percentage were selected?
I tried a switch statement but I'm not sure that is what I need at the moment. Because it's not working.
Please see my code below:
<?php
//////////////////
//Math Variables//
//////////////////
// $r = interest
// $p = principle purchase price
// $br = balloon rate in %
// $d = deposit
//balloon percentage in decimals: $br / 100
//balloon amount: $ba = $p x $br
//principle less deposit: $dp = $p - $d
// $x = formula to calculate amount for p to be devided by
//monthly installment: $mp = $np / $Sx
////////////////////////
//Variables from input//
////////////////////////
//$principle (textbox) [name=principle]
//$deposit (textbox) [name=deposit]
//$term (dropdown) [name=term]
//$interest (dropdown) [name=interest]
//$balloon (dropdown) [name=ballon]
//57 (disabled input) = 57 (monthly) [name=admin]
//$initiation (disabled input) = 1140 [name=initiation]
?>
<form method="post" action="">
<label for="principle">What is the total purchase price?</label>
<input type="text" name="principle" id="principle" value="100000">
<label for="deposit">How much deposit are you paying?</label>
<input type="text" name="deposit" id="deposit" value="0">
<label for="term">How many months to repay the loan?</label>
<select name="term" id="term">
<option>72</option>
<option>60</option>
<option>54</option>
<option>48</option>
<option>36</option>
<option>24</option>
<option>12</option>
</select>
<label for="balloon">What balloon % would you like, if any?</label>
<select name="balloon" id="balloon">
<option>0</option>
<option>5</option>
<option>10</option>
<option>15</option>
<option>20</option>
<option>25</option>
<option>30</option>
<option>35</option>
<option>40</option>
<option>45</option>
<option>50</option>
</select>
<label for="interest">What interest rate will you be paying?</label>
<select name="interest" id="interest">
<option>7</option>
<option>7.5</option>
<option>8</option>
<option>8.5</option>
<option>9</option>
<option>9.5</option>
<option>10</option>
<option>10.5</option>
<option>11</option>
<option>11.5</option>
<option>12</option>
<option>12.5</option>
<option>13</option>
<option>13.5</option>
<option>14</option>
<option>14.5</option>
<option>15</option>
<option>15.5</option>
<option>16.5</option>
</select>
<label for="admin">Bank's monthly admin fee</label>
<input type="text" name="admin" id="admin" value="57" disabled>
<label for="initiation">Finance initiation fee</label>
<input type="text" name="initiation" id="initiation" value="1140" disabled><br />
<input type="submit" value="Calculate">
</form>
<?php
if (isset($_POST['principle'])) $principleInput = $_POST['principle'];
if (isset($_POST['deposit'])) $depositInput = $_POST['deposit'];
if (isset($_POST['term'])) $termInput = $_POST['term'];
if (isset($_POST['interest'])) $interestInput = $_POST['interest'];
if (isset($_POST['balloon'])) $balloonInput = $_POST['balloon'];
$principleInputFinal = $principleInput + 1140;
echo "Finance Amount: " . $principleInputFinal;
//interest
$r = $interestInput / 12 / 100;
echo "<br /><br />Interest: " . $r;
//inputted balloon % in decimals
$br = $balloonInput / 100;
echo "<br /><br />Balloon Rate: " . $br;
//Balloon Amount
$ba = $principleInput * $br;
echo "<br /><br />Balloon Amount: " . $ba;
//Solve for x
$x1 = 1 + $r;
$x2 = pow($x1,-$termInput);
$x3 = 1 - $x2;
$x = $x3 / $r;
echo "<br /><br />" . $x;
//if balloon was selected, calculate new principle
$mpb = $principleInputFinal - $ba;
echo "<br /><br />New Principle Less Balloon: " . $mpb;
//deposit without balloon selected
$mpd = $principleInputFinal - $depositInput;
echo "<br /><br />Principle Less Deposit: " . $mpd;
//deposit with balloon selected
$mpdb = $mpb - $depositInput;
echo "<br /><br />Principle less balloon less deposit: " . $mpdb;
//no deposit and no balloon: calculate monthly installment on actual principle
$mp = $principleInputFinal / $x + 57;
echo "<br /><br />Installment on actual principle: " . $mp;
//interest payed on balloon amount.
$bar = $ba * $r;
echo "<br /><br />" . $bar;
//monthly installment less the interest payed for
$mpbar = $mp - $bar;
echo "<br /><br />" . $mpbar;
//calculate monthly installment with no balloon but with deposit
$monthlyInstallmentDeposit = $mpd / $x + 57;
echo "<br /><br />Installment on principle less deposit: " . $monthlyInstallmentDeposit;
//calculate monthly installment with balloon but no deposit
$monthlyInstallmentBalloon = $mpb / $x + $bar + 57;
echo "<br /><br />Installment on principle less balloon, no deposit calculated: " . $monthlyInstallmentBalloon;
//calculate monthly installment with both balloon and deposit
$monthlyInstallmentBoth = $mpdb / $x + $bar + 57;
echo "<br /><br />Installment on principle less deposit and balloon" . $monthlyInstallmentBoth;
switch ($monthlyInstallment) {
case ($principleInputFinal / $x + 57):
echo "<br /><br />Installment on actual principle: " . $monthlyInstallment;
break;
case ($mpd / $x + $bar + 57):
echo "<br /><br />Installment on principle less deposit: " . $monthlyInstallment;
break;
case ($mpb / $x + $bar + 57):
echo "<br /><br />Installment on principle less balloon, no deposit calculated: " . $monthlyInstallment;
break;
case ($mpdb / $x + $bar + 57):
echo "<br /><br />Installment on principle less deposit and balloon: " . $monthlyInstallment;
break;
}
?>
Please don't get caught up in the math variables. The variables I need to print are:
The variables I want to print are: $mp , $monthlyInstallmentDeposit , $monthlyInstallmentBalloon , $monthlyInstallmentBoth .
2 answers
solution1
0 2014-04-08 20:59:12
This might be a dirty way to do it, but it works:
if (($depositInput > 0) && ($balloonInput > 0)) {
echo "<br /><br />1: Installment on principle less deposit and balloon" . $monthlyInstallmentBoth;
} elseif (($depositInput > 0) && ($balloonInput <= 0)) {
echo "<br /><br />2: Installment on principle less deposit: " . $monthlyInstallmentDeposit;
} elseif (($depositInput <= 0) && ($balloonInput > 0)) {
echo "<br /><br />3: Installment on principle less balloon, no deposit calculated: " . $monthlyInstallmentBalloon;
} else {
echo "<br /><br />4: Installment on actual principle: " . $mp;
}
solution2
-2 2018-10-03 09:25:42
This is my code for given parameter
<?php
// accepting form variable via post request
if($_SERVER['REQUEST_METHOD']=='POST'){
$amount = $_POST['amount'];
$rate = $_POST['rate'];
$installments = $_POST['installments'];
}
// if all good processing start
if(!empty($amount) && !empty($rate) && !empty($installments)){
$dayTime = date('D H:i');
//$dayTime = "Fri 19:30"; //just for testing of if its friday and particular time between 15 to 20
$day = explode(" ", $dayTime); // to get the day from datetime string
$time = explode(":", $day[1]); // to get specific hours from time string
// var_dump($day[0]);die();
// to check if its for special condition for base premium for 13%
if(($day[0] == "Fri") && (($time[0] >= 15) && ($time[0] <= 20))){
$basePremiumfigure = 0.13;
$commissionfigure = 0.17;
$taxfigure = $rate /100;
$basePremium = $amount * $basePremiumfigure;
$commission = $basePremium * $commissionfigure;
$tax = $basePremium * $taxfigure;
$totalCost = $basePremium + $commission + $tax;
// calculating installments
if ($installments > 1) {
$installmentBasePremium = $basePremium / $installments;
$installmentcommission = $commission / $installments;
$installmenttax = $tax / $installments;
$installmenttotalCost = $totalCost / $installments;
}
}else{
$basePremiumfigure = 0.11;
$commissionfigure = 0.17;
$taxfigure = $rate /100;
$basePremium = $amount * $basePremiumfigure;
$commission = $basePremium * $commissionfigure;
$tax = $basePremium * $taxfigure;
$totalCost = $basePremium + $commission + $tax;
// calculating installments
if ($installments > 1) {
$installmentBasePremium = $basePremium / $installments;
$installmentcommission = $commission / $installments;
$installmenttax = $tax / $installments;
$installmenttotalCost = $totalCost / $installments;
}
}
}
?>
<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<link href="style.css" rel="stylesheet" id="bootstrap-css">
<div class="container">
<div class="price-box">
<a href="/insly/insurance/insurance.php"><center><h3>Car Insurance Calculator</h3></center></a>
<div class="row">
<div class="col-sm-12">
<form class="form-horizontal form-pricing" role="form" action="calculate.php" method="Post">
<div class="price-slider">
<h4 class="great">Value</h4>
<div class="col-sm-12">
<div class="form-group">
<input type="text" value="<?php echo $amount; ?>" readonly>
</div>
</div>
</div>
<div class="price-slider">
<h4 class="great">Base Premium (<?php echo $basePremiumfigure*100; ?>%)</h4>
<div class="col-sm-12">
<div class="form-group">
<input type="text" value="<?php echo $basePremium; ?>" readonly>
</div>
</div>
</div>
<div class="price-slider">
<h4 class="great">Commission (17%)</h4>
<div class="col-sm-12">
<div class="form-group">
<input type="text" value="<?php echo $commission; ?>" readonly>
</div>
</div>
</div>
<div class="price-slider">
<h4 class="great">Tax (<?php echo $rate; ?>%)</h4>
<div class="col-sm-12">
<div class="form-group">
<input type="text" value="<?php echo $tax; ?>" readonly>
</div>
</div>
</div>
<div class="price-slider">
<h4 class="great">Total Amount</h4>
<div class="col-sm-12">
<div class="form-group">
<input type="text" value="<?php echo $totalCost; ?>" readonly>
</div>
</div>
</div>
<table class="table">
<thead>
<tr>
<?php $i = 1;
while($i <= $installments){
?>
<th>installment<?php echo $i; ?> </th>
<th>Base Premium</th>
<th>Commission</th>
<th>Tax</th>
<th>Total Coast</th>
<?php $i++; ?>
</tr>
</thead>
<tbody>
<tr>
<td></td>
<?php echo "<td>". number_format($installmentBasePremium,2)."</td>"; ?>
<?php echo "<td>". number_format($installmentcommission,2)."</td>"; ?>
<?php echo "<td>". number_format($installmenttax,2)."</td>"; ?>
<?php echo "<td>". number_format($installmenttotalCost,2)."</td>"; ?>
</tr>
<?php } ?>
</tbody>
</table>
</form>
</div>
</div>
</div>
view my full code on below link.
You can try this script on my website.
https://ansariazam72.blogspot.com/2018/09/basic-car-insurance-calculator.html
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.
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