php PHP：信用卡验证类

Posted 2021-05-04

<?php

	class CardValidation {
        public $valid = false;
        public $valid_cc;
        public $valid_cc_type_pair;
        public $valid_ccv_type_pair;
        public $error;

        public function validate($cc, $type = false, $ccv = false) {
                if($cc !== false) {
                        $this->valid_cc = $this->luhn_algorithm($cc);
                        if($this->valid_cc === true) {
                                $this->valid = true;
                                if($type !== false) {
                                        $this->valid_cc_type_pair = $this->cc_type_pair($cc, $type);
                                        ($this->valid_cc_type_pair === true) ?  $this->valid = true : $this->valid = false;
                                }
                                if($ccv !== false) {
                                        $this->valid_ccv_type_pair = $this->ccv_type_pair($ccv, $type);
                                        ($this->valid_ccv_type_pair === true) ?  $this->valid = true : $this->valid = false;
                                }
                                return $this->valid;
                        }
                        return false;
                } else {
                        $this->error = '';
                }
        }

        private function luhn_algorithm($cc) {
                if($cc) {
                        $c = 1;
                        for($i = strlen($cc); $i > 0; $i--) {
                                $d = (int)substr($cc, $i -1, 1);
                                if($c % 2 == 0) $d = $d * 2;
                                if($d > 9) $d = (int)substr($d, 0, 1) + (int)substr($d, 1, 1);
                                $t = $t + $d;
                                $c++;
                        }
                        return ($t % 10 == 0) ? true : false;
                } else {
                        $this->error = 'A valid card number is required to run this operation.';
                }
                return false;
        }

        private function cc_type_pair($cc, $type) {
                if(isset($cc) && isset($type)) {
                        $cards = array(
                                'VISA' => '/^4\d{12}(\d{3})?$/',
                                'MASTERCARD' => '/^5[1-5]\d{14}$/',
                                'DISCOVER' => '/^6011\d{14}$/',
                                'AMEX' => '/^3(4|7)\d{13}$/',
                                'SOLO' => '/^6767\d{12}(\d{2,3})?$/',
                                'MAESTRO' => '/^(5020|5038|6304|6759|6761)\d{12}(\d{2,3})?$/'
                        );
                        $type = strtoupper($type);
                        if(isset($cards[$type])){
                                if(preg_match($cards[$type], $cc)){
                                        return true;
                                }
                        }
                } else {
                        $this->error = 'A valid card number and type is required to run this operation.';
                }
                return false;
        }

        private function ccv_type_pair($ccv, $type) {
                if(isset($ccv) && isset($type)) {
                        $cards = array(
                                'VISA' => 3,
                                'MASTERCARD' => 3,
                                'DISCOVER' => 3,
                                'AMEX' => 4,
                                'SOLO' => 3,
                                'MAESTRO' => 3
                        );
                        $type = strtoupper($type);
                        if(isset($cards[$type])){
                                if(strlen($ccv) == $cards[$type]){
                                        return true;
                                }
                        }
                } else {
                        $this->error = 'A valid card security code and type is required to run this operation.';
                }
                return false;
        }
}