<?php
$arr_postcode_regexes = [
'offshore' => [
['A', 'B', '3', '[0-8]'], // AB30-38
['A', 'B', '4', '[1-9]'], // AB41-49
['A', 'B', '5', '[0-6]'], // AB50-56
['F', 'K', '1', '[789]'], // FK17-19
['F', 'K', '2', '[01]'], // FK20-21
['G', '8', '3'], // G83
['G', 'Y', '9'], // GY9
['H', 'S', '[1-9]'], // HS1-9
['I', 'M', '[0-9]', '[0-9A-Z]?'], // IM
['I', 'M', '[0-9]', '[0-9A-Z]?'], // IV
['K', 'A', '2', '[89]'], // KA27-28
['K', 'W', '[0-9]', '[0-9]?'], // KW0-99
['P', 'A', '[2-9]', '[0-9]'], // PA20-99
['P', 'H', '1', '[5-9]'], // PH15-19
['P', 'H', '[2-9]', '[0-9]'], // PH20-99
['T', 'R', '2', '[1-5]'], // TR21-25
['Z', 'E', '[0-9]', '[0-9A-Z]?'], // ZE
],
'ni' => [
['B', 'T', '[0-9]', '[0-9A-Z]?'], // ZE
]
];
// Turn the readable-ish map above into actual regexes
// It's important that all regexes match only full, valid postcodes, as prefix matching can be ambiguous.
foreach ($arr_postcode_regexes as $str_id => $arr_parts) {
$arr_temp = [];
foreach ($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);
preferences:
43.02 ms | 402 KiB | 5 Q