Smarty/PHP Regex replace

Question

I have the next string:

countries_united_states_ohio

sometimes it can be countries_spain_madrid

How can I remove the word Countries and have the next output:
United States, Ohio
or
Spain, Madrid

I'm using Smarty and I tried something like this:

{$string|replace:"_":", "|capitalize}

The problem is that it returns United,States(as expected) and I guess I could remove the word 'countries' using substr.

Anyone has any idea?

Thank you!

Answer 1

I think I found a way.
You will need a list of all countries in the world. Example: https://www.countries-ofthe-world.com/all-countries.html

The code will look at each part of the string and see if it's a "country word" if true:
It will make sure it has not already grabbed that word (see all "uinited" countries).
If it is not already in the country array then add it there.

Now I can just implode the country.

State/city is what is left of I remove country and _.

$Ucountries = ["Uganda",
   "Ukraine",
   "United Arab Emirates (UAE)",
   "United Kingdom (UK)",
   "United States of America (USA)",
   "Uruguay",
   "Uzbekistan"];

$Mcountries = ["Macedonia (FYROM)",
   "Madagascar",
   "Malawi",
   "Malaysia",
   "Maldives",
   "Mali",
   "Malta",
   "Marshall Islands",
   "Mauritania",
   "Mauritius",
   "Mexico",
   "Micronesia",
   "Moldova",
   "Monaco",
   "Mongolia",
   "Montenegro",
   "Morocco",
   "Mozambique",
   "Myanmar (Burma)"];

$str = "countries_mexico_mexico_city";
//$str = "countries_united_states_ohio";
$str = str_replace("countries_", "", $str);

// Copy array needed to $CountryList
$CountryList = ${strtoupper(substr($str,0,1)). "countries"}; 

$countryarr = array();
$arr = explode("_", $str);

Foreach($arr as $val){
    Foreach($CountryList as $item){
        If(stripos($item, $val) !== false){
            If(!in_array($val, $countryarr)){
                $countryarr[] = $val;
            }
        }
    }
}

$country = implode(" ", $countryarr);
$state_city = preg_replace("/" . implode("_",$countryarr) . "/", "", $str,1);
$state_city = trim(str_replace("_", " ", $state_city));

Echo $country . "\n" . $state_city;

https://3v4l.org/POMPT

Edit; thought of a way when I was brushing my teeth.
Since the countryarr will only have Mexico I can with preg_replace replace only once.
Also I had to change the replace pattern to a implode of countryarr.
Now what is left is a state/city with a underscore first and one or more words separated with underscore.
So replace underscore with space and trim the string.

EDIT2; Now that I have had some sleep I thought that the array to match against countries will be very large.
So I made a change.
Each first letter of country is a new array, and the code will only loop in the countries with the same first letter.