Question

I have to split address and housenumber for a loopup function.

It is important that this works for any kind of addresses, so I am not 100% sure how to do this the best way possible.

Addresses can look like

Mystreet 14a
Mystreet 4
Mystreet 4a
Wilderness and I have no housenumber

I guess the logic should check for a number followed by a letter or two.

Any nice ways to do this?

TO CLARIFY: This is a lookup for Norwegian addresses where I believe the address is one or more words followed by optional number. The number may also contain a optional letter at the end (see examples above).

Answer 1

Try this solution. I used preg_match to find a Norwegian address like you described in the question:

$input_string = 'Mystreet test 33b';

$address = "";
$number = "";

$matches = array();
if(preg_match('/(?P<address>[^\d]+) (?P<number>\d+.?)/', $input_string, $matches)){
    $address = $matches['address'];
    $number = $matches['number'];
} else { // no number found, it is only address
    $address = $input_string;
}

echo "Input: $input_string <br/>";
echo "Address: $address <br />";
echo "Number: $number";

Sample output:

Input: Mystreet test 33b
Address: Mystreet test
Number: 33b