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Posted By

Scooter on 08/16/08


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isValidPostalCode

 / Published in: PHP
 

URL: http://reusablecode.blogspot.com/2008/08/isvalidpostalcode.html

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  1. <?php
  2.     /*
  3.     Copyright (c) 2008, reusablecode.blogspot.com; some rights reserved.
  4.     
  5.     This work is licensed under the Creative Commons Attribution License. To view
  6.     a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ or
  7.     send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California
  8.     94305, USA.
  9.     */
  10.  
  11.     // Checks the validity of the supplied postal code, both in general and with regards to the corresponding province.
  12.     function isValidPostalCode($postalCode, $province)
  13.     {
  14.         // Check for valid format and for presence of invalid characters.
  15.         if !(eregi("^[ABCEGHJ-NPRSTVXY]{1}[0-9]{1}[ABCEGHJ-NPRSTV-Z]{1}[ ]?[0-9]{1}[ABCEGHJ-NPRSTV-Z]{1}[0-9]{1}$", $postalCode))
  16.         {        
  17.             return false;
  18.         }
  19.         else
  20.         {
  21.             $pattern = "";
  22.  
  23.             // Check province and select corresponding regular expression pattern.
  24.             switch(strtoupper($province))
  25.             {
  26.                 case "AB":
  27.                     // Alberta
  28.                     $pattern = "^T(0[ABCEGHJ-MPV]|1[ABCGHJ-MPRSV-Y]|2[ABCEGHJ-NPRSTV-Z]|3[ABCEGHJ-NPRZ]|4[ABCEGHJLNPRSTVX]|5[ABCEGHJ-NPRSTV-Z]|6[ABCEGHJ-NPRSTVWX]|7[AENPSVXYZ]|8[ABCEGHLNRSVWX]|9[ACEGHJKMNSVWX])";
  29.                     break;
  30.                 case "BC":
  31.                     // British Columbia
  32.                     $pattern = "^V(0[ABCEGHJ-NPRSTVWX]|1[ABCEGHJ-NPRSTV-Z]|2[ABCEGHJ-NPRSTV-Z]|3[ABCEGHJ-NRSTV-Y]|4[ABCEGK-NPRSTVWXZ]|5[ABCEGHJ-NPRSTV-Z]|6[ABCEGHJ-NPRSTV-Z]|7[ABCEGHJ-NPRSTV-Y]|8[ABCGJ-NPRSTV-Z]|9[ABCEGHJ-NPRSTV-Z])";
  33.                     break;
  34.                 case "MB":
  35.                     // Manitoba
  36.                     $pattern = "^R(0[ABCEGHJ-M]|1[ABN]|2[CEGHJ-NPRV-Y]|3[ABCEGHJ-NPRSTV-Y]|4[AHJKL]|5[AGH]|6[MW]|7[ABCN]|8[AN]|9[A])";
  37.                     break;
  38.                 case "NB":
  39.                     // New Brunswick
  40.                     $pattern = "^E(1[ABCEGHJNVWX]|2[AEGHJ-NPRSV]|3[ABCELNVYZ]|4[ABCEGHJ-NPRSTV-Z]|5[ABCEGHJ-NPRSTV]|6[ABCEGHJKL]|7[ABCEGHJ-NP]|8[ABCEGJ-NPRST]|9[ABCEGH])";                        
  41.                     break;
  42.                 case "NL":
  43.                     // Newfoundland
  44.                     $pattern = "^A(0[ABCEGHJ-NPR]|1[ABCEGHK-NSV-Y]|2[ABHNV]|5[A]|8[A])";
  45.                     break;
  46.                 case "NS":
  47.                     // Nova Scotia
  48.                     $pattern = "^B(0[CEHJ-NPRSTVW]|1[ABCEGHJ-NPRSTV-Y]|2[ABCEGHJNRSTV-Z]|3[ABEGHJ-NPRSTVZ]|4[ABCEGHNPRV]|5[A]|6[L]|9[A])";
  49.                     break;
  50.                 case "NT":
  51.                     // North West Territories
  52.                     $pattern = "^X(0[XG]|1[A])";
  53.                     break;
  54.                 case "NU":
  55.                     // Nunavut
  56.                     $pattern = "^X(0[ABC])";
  57.                     break;
  58.                 case "ON":
  59.                     // Ontario
  60.                     $pattern = "^(K(0[ABCEGHJ-M]|1[ABCEGHJ-NPRSTV-Z]|2[ABCEGHJ-MPRSTVW]|4[ABCKMPR]|6[AHJKTV]|7[ACGHK-NPRSV]|8[ABHNPRV]|9[AHJKLV]))|(L(0[[ABCEGHJ-NPRS]]|1[ABCEGHJ-NPRSTV-Z]|2[AEGHJMNPRSTVW]|3[BCKMPRSTVXYZ]|4[ABCEGHJ-NPRSTV-Z]|5[ABCEGHJ-NPRSTVW]|6[ABCEGHJ-MPRSTV-Z]|7[ABCEGJ-NPRST]|8[EGHJ-NPRSTVW]|9[ABCGHK-NPRSTVWYZ]))|(M(1[BCEGHJ-NPRSTVWX]|2[HJ-NPR]|3[ABCHJ-N]|4[ABCEGHJ-NPRSTV-Y]|5[ABCEGHJ-NPRSTVWX]|6[ABCEGHJ-NPRS]|7[AY]|8[V-Z]|9[ABCLMNPRVW]))|(N(0[ABCEGHJ-NPR]|1[ACEGHKLMPRST]|2[ABCEGHJ-NPRTVZ]|3[ABCEHLPRSTVWY]|4[BGKLNSTVWXZ]|5[ACHLPRV-Z]|6[ABCEGHJ-NP]|7[AGLMSTVWX]|8[AHMNPRSTV-Y]|9[ABCEGHJKVY]))|(P(0[ABCEGHJ-NPRSTV-Y]|1[ABCHLP]|2[ABN]|3[ABCEGLNPY]|4[NPR]|5[AEN]|6[ABC]|7[ABCEGJKL]|8[NT]|9[AN]))";
  61.                     break;
  62.                 case "PE":
  63.                     // Prince Edward Island
  64.                     $pattern = "^C(0[AB]|1[ABCEN])";
  65.                     break;
  66.                 case "QC":
  67.                     // Quebec
  68.                     $pattern = "^(G(0[ACEGHJ-NPRSTV-Z]|1[ABCEGHJ-NPRSTV-Y]|2[ABCEGJ-N]|3[ABCEGHJ-NZ]|4[ARSTVWXZ]|5[ABCHJLMNRTVXYZ]|6[ABCEGHJKLPRSTVWXZ]|7[ABGHJKNPSTXYZ]|8[ABCEGHJ-NPTVWYZ]|9[ABCHNPRTX]))|(H(0[HM]|1[ABCEGHJ-NPRSTV-Z]|2[ABCEGHJ-NPRSTV-Z]|3[ABCEGHJ-NPRSTV-Z]|4[ABCEGHJ-NPRSTV-Z]|5[AB]|7[ABCEGHJ-NPRSTV-Y]|8[NPRSTYZ]|9[ABCEGHJKPRSWX]))|(J(0[ABCEGHJ-NPRSTV-Z]|1[ACEGHJ-NRSTXZ]|2[ABCEGHJ-NRSTWXY]|3[ABEGHLMNPRTVXYZ]|4[BGHJ-NPRSTV-Z]|5[ABCJ-MRTV-Z]|6[AEJKNRSTVWYXZ]|7[ABCEGHJ-NPRTV-Z]|8[ABCEGHLMNPRTVXYZ]|9[ABEHJLNTVXYZ]))";
  69.                     break;
  70.                 case "SK":
  71.                     // Saskatchewan
  72.                     $pattern = "^S(0[ACEGHJ-NP]|2[V]|3[N]|4[AHLNPRSTV-Z]|6[HJKVWX]|7[HJ-NPRSTVW]|9[AHVX])";                        
  73.                     break;
  74.                 case "YT":
  75.                     // Yukon
  76.                     $pattern = "^Y(0[AB]|1[A])";
  77.                     break;
  78.             }
  79.  
  80.             // Test postal code against regular expression pattern.
  81.             return (($pattern != "") && (eregi($pattern, $postalCode))) ? true : false;
  82.         }
  83.     }
  84. ?>

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