UK postcode regex validation

问题

I was looking for a valid UK postcode regex pattern, but seems that any of them work as a traditional or normal regex.

I test all patterns using this tool: https://regex101.com/

The regex I found in this document https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/413338/Bulk_Data_Transfer_-_additional_validation_valid_from_March_2015.pdf is not working.

I tried all regex in this wiki page https://en.wikipedia.org/wiki/Talk:Postcodes_in_the_United_Kingdom but nothing.

Am I doing something wrong?

I'm writing an Angular directive.

var regex = ????;

// add a parser that will process each time the value is 
// parsed into the model when the user updates it.
ngModel.$parsers.unshift(function(value) {
    // test and set the validity after update.
    var valid = regex.test(value);
    console.log(valid);
    ngModel.$setValidity('ukPostcode', valid);

    // if it's valid, return the value to the model, 
    // otherwise return undefined.
    return valid ? value : undefined;
});

Thank you.

回答1:

When your regex is corrected it matches both:

rg224ph
rg141de

Your regex currently has two errors:

[A-PR-UWYZa-pr-uwyz0-9][A-HK-Ya-hk-y0-9][AEHMNPRTVXYaehmnprtvxy0-9]?[ABEHMNPRVWXYabehmnprvwxy0-9]?{1,2}[0-9][ABD-HJLN-UW-Zabd-hjln-uw-z]{2}|(GIRgir){3} 0(Aa){2})
                                                                                                 ^ {1,2} Preceding token is not quantifiable

and

[A-PR-UWYZa-pr-uwyz0-9][A-HK-Ya-hk-y0-9][AEHMNPRTVXYaehmnprtvxy0-9]?[ABEHMNPRVWXYabehmnprvwxy0-9]?{1,2}[0-9][ABD-HJLN-UW-Zabd-hjln-uw-z]{2}|(GIRgir){3} 0(Aa){2})
                                                                                                                                                                ^ ) Unbalanced parenthesis

I presume that the regex you intended was:

([A-PR-UWYZa-pr-uwyz0-9][A-HK-Ya-hk-y0-9][AEHMNPRTVXYaehmnprtvxy0-9]?[ABEHMNPRVWXYabehmnprvwxy0-9]{1,2}[0-9][ABD-HJLN-UW-Zabd-hjln-uw-z]{2}|(GIRgir){3} 0(Aa){2})

Which matches both inputs.

来源：https://stackoverflow.com/questions/31875576/uk-postcode-regex-validation

标签

regex

postal-code