Question

My questions sound may different but I am really looking for solution.

I have a variable in PHP, let’s say $check, containing a string. It can be either an address or a postal code. Is there any rule we can apply here to check whether variable has postcode or address?

Edit: This website is for UK

Thanks

Answer 1

Quite detailed link: here

function IsPostcode($postcode)
    {
    $postcode = strtoupper(str_replace(' ','',$postcode));
    if(preg_match("/^[A-Z]{1,2}[0-9]{2,3}[A-Z]{2}$/",$postcode) || preg_match("/^[A-Z]{1,2}[0-9]{1}[A-Z]{1}[0-9]{1}[A-Z]{2}$/",$postcode) || preg_match("/^GIR0[A-Z]{2}$/",$postcode))
    return true;
    else
    return false;
    }

Use:

$e = "AB235RB";
if (IsPostcode($e))
print "Valid Post Code";
else
print "Invalid Post Code";

I have written a UK postcode validator based off this, so I know it works 🙂