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@ 2019-10-24T06:19:52Z

<?php

    $str = "Munich, Germany, Berlin, Germany, London, UK, Paris, France, Vienna, Austria, Milano, Italy, Rome, Italy";
    $array = explode(",",$str);
    foreach($array as $k => $value){
        if($k % 2){
            $country_list[] = trim($value);
        }else{
            $city_list[] = trim($value);
        }
    }
    
    print_r(join(",",$city_list));
    print_r(PHP_EOL);
    print_r(join(",",$country_list));

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
explode: documentation ( source)
trim: documentation ( source)
join: documentation ( source)

preferences:dark modelive previewkey bindings

29.9 ms | 407 KiB | 5 Q