1 |
<? |
2 |
/* |
3 |
+----------------------------------------------------------------------+ |
4 |
| Copyright (c) 2000 J.A.Greant | |
5 |
| (See end of file for usage notes and licensing information.) | |
6 |
+----------------------------------------------------------------------+ |
7 |
*/ |
8 |
|
9 |
class CreditCard |
10 |
{ |
11 |
function clean_no ($cc_no) |
12 |
{ |
13 |
// Remove non-numeric characters from $cc_no |
14 |
return ereg_replace ('[^0-9]+', '', $cc_no); |
15 |
} |
16 |
|
17 |
function identify ($cc_no) |
18 |
{ |
19 |
$cc_no = CreditCard::clean_no ($cc_no); |
20 |
|
21 |
// Get card type based on prefix and length of card number |
22 |
if (ereg ('^4(.{12}|.{15})$', $cc_no)) |
23 |
return 'Visa'; |
24 |
if (ereg ('^5[1-5].{14}$', $cc_no)) |
25 |
return 'Mastercard'; |
26 |
if (ereg ('^3[47].{13}$', $cc_no)) |
27 |
return 'American Express'; |
28 |
if (ereg ('^3(0[0-5].{11}|[68].{12})$', $cc_no)) |
29 |
return 'Diners Club/Carte Blanche'; |
30 |
if (ereg ('^6011.{12}$', $cc_no)) |
31 |
return 'Discover Card'; |
32 |
if (ereg ('^(3.{15}|(2131|1800).{11})$', $cc_no)) |
33 |
return 'JCB'; |
34 |
if (ereg ('^2(014|149).{11})$', $cc_no)) |
35 |
return 'enRoute'; |
36 |
|
37 |
return 'unknown'; |
38 |
} |
39 |
|
40 |
function validate ($cc_no) |
41 |
{ |
42 |
// Reverse and clean the number |
43 |
$cc_no = strrev (CreditCard::clean_no ($cc_no)); |
44 |
|
45 |
// VALIDATION ALGORITHM |
46 |
// Loop through the number one digit at a time |
47 |
// Double the value of every second digit (starting from the right) |
48 |
// Concatenate the new values with the unaffected digits |
49 |
for ($ndx = 0; $ndx < strlen ($cc_no); ++$ndx) |
50 |
$digits .= ($ndx % 2) ? $cc_no[$ndx] * 2 : $cc_no[$ndx]; |
51 |
|
52 |
// Add all of the single digits together |
53 |
for ($ndx = 0; $ndx < strlen ($digits); ++$ndx) |
54 |
$sum += $digits[$ndx]; |
55 |
|
56 |
// Valid card numbers will be transformed into a multiple of 10 |
57 |
return ($sum % 10) ? FALSE : TRUE; |
58 |
} |
59 |
|
60 |
function check ($cc_no) |
61 |
{ |
62 |
$valid = CreditCard::validate ($cc_no); |
63 |
$type = CreditCard::identify ($cc_no); |
64 |
return array ($valid, $type, 'valid' => $valid, 'type' => $type); |
65 |
} |
66 |
} |
67 |
|
68 |
/* |
69 |
+----------------------------------------------------------------------+ |
70 |
| FILE NAME: CreditCard.pkg | |
71 |
+----------------------------------------------------------------------+ |
72 |
| Author: J.A.Greant | |
73 |
| Email : zak@nucleus.com | |
74 |
| Date : 2000/11/23 | |
75 |
+----------------------------------------------------------------------+ |
76 |
| The CreditCard class provides methods for cleaning, validating and | |
77 |
| identifying the type of credit card number. The validation algorithm | |
78 |
| and identification procedures are based on information found at: | |
79 |
| http://www.beachnet.com/~hstiles/cardtype.html | |
80 |
| | |
81 |
| CreditCard::clean_no() method | |
82 |
| ------------------------------ | |
83 |
| Strips all non-numeric characters from the passed value and returns | |
84 |
| an integer. This method is called by the other methods in the | |
85 |
| CreditCard class. | |
86 |
| | |
87 |
| USAGE EXAMPLE: | |
88 |
| $cc_no ="5454 5454 5454 5454"; // Has spaces for readability | |
89 |
| $cleaned_cc_no = CreditCard::clean_no ($cc_no); | |
90 |
| print $cleaned_cc_no; // Displays 5454545454545454 | |
91 |
| | |
92 |
| CreditCard::identify() method | |
93 |
| ------------------------------ | |
94 |
| Finds the type of credit card (Mastercard, Visa, etc...) based on | |
95 |
| the length and format of the credit card number. The method can | |
96 |
| identify American Express, Diners Club/Carte Blanche, Discover, | |
97 |
| enRoute, JCB, Mastercard and Visa cards. | |
98 |
| | |
99 |
| USAGE EXAMPLE: | |
100 |
| $cc_no ="5454 5454 5454 5454"; | |
101 |
| print CreditCard::identify ($cc_no); // Returns "Mastercard" | |
102 |
| | |
103 |
| CreditCard::validate() method | |
104 |
| ------------------------------ | |
105 |
| Validate a credit card number using the LUHN formula (mod 10). | |
106 |
| Note that many other kinds of card and account numbers are based on | |
107 |
| the LUHN algorith - including Canadian Social Insurance Numbers. | |
108 |
| | |
109 |
| USAGE EXAMPLE: | |
110 |
| $cc_no ="5454 5454 5454 5454"; | |
111 |
| print CreditCard::validate ($cc_no); // Returns TRUE | |
112 |
| | |
113 |
| CreditCard::check() method | |
114 |
| --------------------------- | |
115 |
| The check() method validates and identifies a credit card, returning | |
116 |
| an array. Indexes 0 and 'valid' will contain TRUE if the card number | |
117 |
| is valid (FALSE if it isn't), while indexes 1 and 'type' will | |
118 |
| the type of card (if known). The presence of the numeric keys allows | |
119 |
| the method to be used with the list() function. | |
120 |
| | |
121 |
| USAGE EXAMPLE: | |
122 |
| $cc_no ="4111 1111 1111 1111"; | |
123 |
| list ($valid, $type) = CreditCard::check ($cc_no); | |
124 |
| print $valid; // Displays 1 (TRUE) | |
125 |
| print $type; // Displays "Visa" | |
126 |
+----------------------------------------------------------------------+ |
127 |
|
128 |
+----------------------------------------------------------------------+ |
129 |
| CVS LOG INFO | |
130 |
+----------------------------------------------------------------------+ |
131 |
$Log: CreditCard.php,v $ |
132 |
Revision 1.1 2002/12/22 13:28:38 jonen |
133 |
+ first init |
134 |
class for advanced creditcard format and type checking |
135 |
|
136 |
Revision 1.2 2000/11/24 07:02:15 zak |
137 |
Added top copyright notice |
138 |
|
139 |
Revision 1.1 2000/11/24 06:58:42 zak |
140 |
Initial commit of credit card class to repository. |
141 |
Cleaned and modified code. |
142 |
Also rewrote significant parts of code so that I could change to the |
143 |
more friendly BSD-style license. |
144 |
|
145 |
|
146 |
+----------------------------------------------------------------------+ |
147 |
| Copyright (c) 2000 J.A.Greant (jag@nucleus.com) | |
148 |
| All rights reserved. | |
149 |
+----------------------------------------------------------------------+ |
150 |
| Redistribution and use in source and binary forms, with or without | |
151 |
| modification, is permitted provided that the following conditions | |
152 |
| are met: | |
153 |
+----------------------------------------------------------------------+ |
154 |
| Redistributions of source code must retain the above copyright | |
155 |
| notice, this list of conditions and the following disclaimer. | |
156 |
| | |
157 |
| Redistributions in binary form must reproduce the above copyright | |
158 |
| notice, this list of conditions and the following disclaimer in the | |
159 |
| documentation and/or other materials provided with the distribution. | |
160 |
| | |
161 |
| Neither the name of the author nor the names of any contributors to | |
162 |
| this software may be used to endorse or promote products derived | |
163 |
| from this software without specific prior written permission. | |
164 |
| | |
165 |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
166 |
| ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
167 |
| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
168 |
| FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
169 |
| AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
170 |
| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
171 |
| BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
172 |
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
173 |
| CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
174 |
| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |
175 |
| ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
176 |
| POSSIBILITY OF SUCH DAMAGE. | |
177 |
+----------------------------------------------------------------------+ |
178 |
*/ |
179 |
|
180 |
?> |