<?php

function encode_to_utf8 ($input) {
    $output = $input;
    if($encoding == get_encoding($input)) {
        $output = iconv($encoding, "UTF-8", $output);
    }
    return($output);
}

function get_encoding ($input) {
    $encondings = array("ASCII", "UTF-8", "ISO-8859-1");
    $input_md5 = md5($input);
    foreach($encondings as $enconding) {
        $sample = iconv($enconding, $enconding, $input);
        if(md5($sample) == $input_md5) {
            return($enconding);
        }
    }
    return(false);
}

function recursive_encode_to_utf8 ($array) {
    if(is_array($array)) {
        foreach($array as $key => $value) {
            if(is_array($value)) {
                $tmparray[$key] = recursive_encode_to_utf8($value);
            }
            else {
                $tmparray[$key] = encode_to_utf8($value);
            }
        }
        return($tmparray);
    }
    else {
        return(encode_to_utf8($array));
    }
}