Online PHP editor | refs for piVbK

<?php $arr_postcode_regexes = array( 'uk' => array( // Should match any *valid* UK postcode array('[A-Z]', '[A-Z]?', '[0-9]', '[0-9A-Z]?'), ), 'offshore' => array( // All postcode areas that DPD define as "offshore" array('A', 'B', '3', '[0-8]'), // AB30-38 array('A', 'B', '4', '[1-9]'), // AB41-49 array('A', 'B', '5', '[0-6]'), // AB50-56 array('F', 'K', '1', '[789]'), // FK17-19 array('F', 'K', '2', '[01]'), // FK20-21 array('G', '8', '3'), // G83 array('G', 'Y', '9'), // GY9 array('H', 'S', '[1-9]'), // HS1-9 array('I', 'M', '[0-9]', '[0-9A-Z]?'), // IM array('I', 'M', '[0-9]', '[0-9A-Z]?'), // IV array('K', 'A', '2', '[89]'), // KA27-28 array('K', 'W', '[0-9]', '[0-9]?'), // KW0-99 array('P', 'A', '[2-9]', '[0-9]'), // PA20-99 array('P', 'H', '1', '[5-9]'), // PH15-19 array('P', 'H', '[2-9]', '[0-9]'), // PH20-99 array('T', 'R', '2', '[1-5]'), // TR21-25 array('Z', 'E', '[0-9]', '[0-9A-Z]?'), // ZE ), 'ni' => array( // Northern Ireland array('B', 'T', '[0-9]', '[0-9A-Z]?'), // ZE ), ); // Turn the readable-ish map above into actual regexes // It's important that all regexes match only full, valid postcodes, as prefix matching can be ambiguous. // Pack everything out with \s* because people are idiots and put whitespace in weird places. foreach ($arr_postcode_regexes as $str_id => $arr_parts) { $arr_temp = array(); foreach ($arr_parts as $arr_part) { $arr_temp[] = implode('\s*', $arr_part) . '\s*[0-9]\s*[A-Z]\s*[A-Z]'; } $arr_postcode_regexes[$str_id] = '^\s*(' . implode('|', $arr_temp) . ')\s*$'; } var_dump($arr_postcode_regexes);