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Credit card validation in php

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Validate the credit card number is valid or not

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  1. <?php
  2. function validateCC($cc_num, $type) {
  3.  
  4. 	if($type == "American") {
  5. 	$denum = "American Express";
  6. 	} elseif($type == "Dinners") {
  7. 	$denum = "Diner's Club";
  8. 	} elseif($type == "Discover") {
  9. 	$denum = "Discover";
  10. 	} elseif($type == "Master") {
  11. 	$denum = "Master Card";
  12. 	} elseif($type == "Visa") {
  13. 	$denum = "Visa";
  14. 	}
  15.  
  16. 	if($type == "American") {
  17. 	$pattern = "/^([34|37]{2})([0-9]{13})$/";//American Express
  18. 	if (preg_match($pattern,$cc_num)) {
  19. 	$verified = true;
  20. 	} else {
  21. 	$verified = false;
  22. 	}
  23.  
  24.  
  25. 	} elseif($type == "Dinners") {
  26. 	$pattern = "/^([30|36|38]{2})([0-9]{12})$/";//Diner's Club
  27. 	if (preg_match($pattern,$cc_num)) {
  28. 	$verified = true;
  29. 	} else {
  30. 	$verified = false;
  31. 	}
  32.  
  33.  
  34. 	} elseif($type == "Discover") {
  35. 	$pattern = "/^([6011]{4})([0-9]{12})$/";//Discover Card
  36. 	if (preg_match($pattern,$cc_num)) {
  37. 	$verified = true;
  38. 	} else {
  39. 	$verified = false;
  40. 	}
  41.  
  42.  
  43. 	} elseif($type == "Master") {
  44. 	$pattern = "/^([51|52|53|54|55]{2})([0-9]{14})$/";//Mastercard
  45. 	if (preg_match($pattern,$cc_num)) {
  46. 	$verified = true;
  47. 	} else {
  48. 	$verified = false;
  49. 	}
  50.  
  51.  
  52. 	} elseif($type == "Visa") {
  53. 	$pattern = "/^([4]{1})([0-9]{12,15})$/";//Visa
  54. 	if (preg_match($pattern,$cc_num)) {
  55. 	$verified = true;
  56. 	} else {
  57. 	$verified = false;
  58. 	}
  59.  
  60. 	}
  61.  
  62. 	if($verified == false) {
  63. 	//Do something here in case the validation fails
  64. 	echo "Credit card invalid. Please make sure that you entered a valid <em>" . $denum . "</em> credit card ";
  65.  
  66. 	} else { //if it will pass...do something
  67. 	echo "Your <em>" . $denum . "</em> credit card is valid";
  68. 	}
  69.  
  70.  
  71. }
  72. echo validateCC("4111111111111111", "Visa");
  73. ?>

URL: http://www.roscripts.com/How_to_validate_credit_card_numbers-106.html

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