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PHP function to verify ID number

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Release： 2016-07-25 08:55:02
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  2. function validation_filter_id_card($id_card){
  3. if(strlen($id_card)==18){
  4. return idcard_checksum18($id_card);
  5. }elseif((strlen($id_card)==15)){
  6. $id_card=idcard_15to18($id_card);
  7. return idcard_checksum18($id_card);
  8. }else{
  9. return false;
  10. }
  11. }
  12. // Calculate the ID card verification code, according to the national standard GB 11643-1999
  13. function idcard_verify_number( $idcard_base){
  14. if(strlen($idcard_base)!=17){
  15. return false;
  16. }
  17. //Weighting factor
  18. $factor=array(7,9,10,5,8,4,2,1, 6,3,7,9,10,5,8,4,2);
  19. //Corresponding value of the check code
  20. $verify_number_list=array('1','0','X','9',' 8','7','6','5','4','3','2');
  21. $checksum=0;
  22. for($i=0;$i
  23. $checksum += substr($idcard_base,$i,1) * $factor[$i];
  24. }
  25. $mod=$checksum % 11;
  26. $verify_number=$verify_number_list[$mod];
  27. return $verify_number;
  28. }
  29. // Upgrade the 15-digit ID card to 18 digits
  30. function idcard_15to18($idcard){
  31. if(strlen($idcard)!=15){
  32. return false;
  33. }else{
  34. / / If the ID card sequence code is 996 997 998 999, these are special codes for people over 100 years old
  35. if(array_search(substr($idcard,12,3),array('996','997','998' ,'999')) !== false){
  36. $idcard=substr($idcard,0,6).'18'.substr($idcard,6,9);
  37. }else{
  38. $idcard=substr( $idcard,0,6).'19'.substr($idcard,6,9);
  39. }
  40. }
  41. $idcard=$idcard.idcard_verify_number($idcard);
  42. return $idcard;
  43. }
  44. // 18 Validity check of ID card verification code
  45. function idcard_checksum18($idcard){
  46. if(strlen($idcard)!=18){
  47. return false;
  48. }
  49. $idcard_base=substr($idcard,0,17);
  50. if(idcard_verify_number($idcard_base)!=strtoupper(substr($idcard,17,1))){
  51. return false;
  52. }else{
  53. return true;
  54. }
  55. }
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Call method :

  2. validation_filter_id_card('ID number');
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Related labels：
PHP 验证身份证号的函数
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