<h2><strong>Thank you for using our deposit calculator</strong></h2>
<p>Unfortunately we can not calculate the payments because you entered the following invalid data:</p>
<ul>
<?php
// Iterate through each post variable and display relevant errors
foreach ($labels as $label) {
// Set default checkbox
$_POST[$labels['contactTime']] = isset($_POST[$labels['contactTime']]) ? $_POST[$labels['contactTime']] : [];
// Check for required fields
if (!is_valid($_POST[$label]) && $label !== 'ContactTime') {
echo "<li>" . $label . ' ' . $rules['empty'] . "</li>";
}
// Check that principal amount is numeric and greater than zero
if ($label == $labels['principal']) {
if (is_valid($_POST[$label]) && is_num_above_zero($_POST[$label]) == false) {
echo "<li>" . $labels['principal'] . $rules['numeric_above_zero'] . "</li>";
}
}
// Check that interest rate is numeric and not negative
if ($label == $labels['interest']) {
if (is_valid($_POST[$label]) && is_num_not_negative($_POST[$label]) == false) {
echo "<li>" . $labels['interest'] . $rules['numeric_not_negative'] . "</li>";
}
}
// Check for valid phone number
if ($label == $labels['phone']) {
if (is_valid($_POST[$label]) && is_valid_phone($_POST[$label]) == false) {
echo "<li>" . $labels['phone'] . $rules['valid_phone'] . "</li>";
}
}
<?php
/* Define global field array for use in custom error messages */
$requiredField = array('amount' => 'amount', 'unit' => 'unit');
/* Define validation rule messages */
$errorMessage = array('no_amount' => 'You did not enter an amount', 'no_unit' => 'You did not enter a unit to convert to', 'num_above_zero' => 'The entered amount must be numeric and greater than zero');
/* Define error array */
$errors = array();
/* If the convert button was pressed */
if (isset($_POST['convert'])) {
/* Check if an amount has been entered */
if (!is_valid(sanitize_input($_POST[$requiredField['amount']]))) {
array_push($errors, [$requiredField['amount'] => $errorMessage['no_amount']]);
}
/* If an amount has been entered and is valid, check if numeric and greater than zero */
if (is_valid(sanitize_input($_POST[$requiredField['amount']])) && !is_num_above_zero($_POST[$requiredField['amount']])) {
array_push($errors, [$requiredField['amount'] => $errorMessage['num_above_zero']]);
}
/* Check if a unit has been selected */
if ($_POST[$requiredField['unit']] == 'default') {
array_push($errors, [$requiredField['unit'] => $errorMessage['no_unit']]);
}
/* If there are no errors, convert! */
if (!has_items($errors)) {
/* Send the submitted values to the convert function */
$convertedValue = ConvertLiquid($_POST[$requiredField['amount']], $_POST[$requiredField['unit']]);
}
} else {
if (isset($_POST['reset'])) {
unset($errors);
}
