validate($data)) { $this->loan_amount = (float) $data['loan_amount']; $this->interest = (float) $data['interest']; $this->terms = (int) $data['terms']; $this->paid_term = (int) $data['paid_term']; $this->emi = (int) $data['emi']; $this->amount_payable = (int) $data['amount_payable']; $this->amount_paid = (int) $data['amount_paid']; $this->terms = ($this->terms == 0) ? 1 : $this->terms; $this->period = $this->terms; if($this->paid_term == "" || $this->paid_term == 0){ $this->paid_term = $this->terms; } //$this->interest = ($this->interest); // $results = array( // 'inputs' => $data, // 'summary' => $this->getSummary(), // 'shedule' => $this->getShedule(), // ); return json_encode($this->getSummary()); //$this->getJSON($results); } } private function validate($data) { $data_format = array( 'loan_amount' => 0, 'interest' => 0, 'terms' => 0 ); $validate_data = array_diff_key($data_format,$data); if(empty($validate_data)) { return true; }else{ echo "

"; echo '

Missing Values

'; foreach ($validate_data as $key => $value) { echo ":: Value $key is missing.
"; } echo "

"; return false; } } private function calculate() { $deno = 1 - 1 / pow((1+ $this->interest),$this->period); $this->term_pay = $this->emi ; if($this->period == 1){ $this->term_pay = $this->amount_payable - $this->amount_paid ; } $interest = ($this->loan_amount * $this->interest)/100; $this->principal = $this->term_pay - $interest; $this->balance = $this->loan_amount - $this->principal; if($this->period == 1){ $this->balance = 0; } return array ( 'payment' => $this->term_pay, 'interest' => $interest, 'principal' => $this->principal, 'balance' => $this->balance ); } public function getSummary() { $this->calculate(); $total_pay = $this->term_pay * $this->period; $total_interest = $total_pay - $this->loan_amount; return array ( 'total_pay' => $total_pay, 'total_interest' => $total_interest, ); } public function getShedule () { $shedule = array(); $summary = array(); while ($this->balance >= 0 && $this->paid_term > 0) { array_push($shedule, $this->calculate()); $this->loan_amount = $this->balance; $this->period--; $this->paid_term--; $this->amount_paid = $this->amount_paid + $this->emi; } return $shedule; } private function getJSON($data) { header('Content-Type: application/json'); echo json_encode($data); } }