EncodingHelper.php

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<?php
namespace ‪Mso\IdnaConvert;
 
class ‪EncodingHelper
{
    public static function ‪toUtf8($string = '', $encoding = 'iso-8859-1', $safe_mode = false)
    {
        $safe = ($safe_mode) ? $string : false;
        if (strtoupper($encoding) == 'UTF-8' || strtoupper($encoding) == 'UTF8') {
            return $string;
        }
        if (strtoupper($encoding) == 'ISO-8859-1') {
            return \utf8_encode($string);
        }
        if (strtoupper($encoding) == 'WINDOWS-1252') {
            return \utf8_encode(self::map_w1252_iso8859_1($string));
        }
 
        if (strtoupper($encoding) == 'UNICODE-1-1-UTF-7') {
            $encoding = 'utf-7';
        }
        if (function_exists('mb_convert_encoding')) {
            $conv = @mb_convert_encoding($string, 'UTF-8', strtoupper($encoding));
            if ($conv) {
                return $conv;
            }
        }
        if (function_exists('iconv')) {
            $conv = @iconv(strtoupper($encoding), 'UTF-8', $string);
            if ($conv) {
                return $conv;
            }
        }
        if (function_exists('libiconv')) {
            $conv = @libiconv(strtoupper($encoding), 'UTF-8', $string);
            if ($conv) {
                return $conv;
            }
        }
 
        return $safe;
    }
 
    public static function ‪fromUtf8($string = '', $encoding = 'iso-8859-1', $safe_mode = false)
    {
        $safe = ($safe_mode) ? $string : false;
        if (!$encoding) {
            $encoding = 'ISO-8859-1';
        }
        if (strtoupper($encoding) == 'UTF-8' || strtoupper($encoding) == 'UTF8') {
            return $string;
        }
        if (strtoupper($encoding) == 'ISO-8859-1') {
            return utf8_decode($string);
        }
        if (strtoupper($encoding) == 'WINDOWS-1252') {
            return ‪self::map_iso8859_1_w1252(utf8_decode($string));
        }
 
        if (strtoupper($encoding) == 'UNICODE-1-1-UTF-7') {
            $encoding = 'utf-7';
        }
        if (function_exists('mb_convert_encoding')) {
            $conv = @mb_convert_encoding($string, strtoupper($encoding), 'UTF-8');
            if ($conv) {
                return $conv;
            }
        }
        if (function_exists('iconv')) {
            $conv = @iconv('UTF-8', strtoupper($encoding), $string);
            if ($conv) {
                return $conv;
            }
        }
        if (function_exists('libiconv')) {
            $conv = @libiconv('UTF-8', strtoupper($encoding), $string);
            if ($conv) {
                return $conv;
            }
        }
 
        return $safe;
    }
 
    protected static function ‪map_w1252_iso8859_1($string = '')
    {
        if ($string == '') {
            return '';
        }
        $return = '';
 
        for ($i = 0; $i < strlen($string); ++$i) {
            $c = ord($string{$i});
            switch ($c) {
                case 129: $return .= chr(252); break;
                case 132: $return .= chr(228); break;
                case 142: $return .= chr(196); break;
                case 148: $return .= chr(246); break;
                case 153: $return .= chr(214); break;
                case 154: $return .= chr(220); break;
                case 225: $return .= chr(223); break;
                default: $return .= chr($c);
            }
        }
 
        return $return;
    }
 
    protected static function ‪map_iso8859_1_w1252($string = '')
    {
        if ($string == '') {
            return '';
        }
 
        $return = '';
        for ($i = 0; $i < strlen($string); ++$i) {
            $c = ord($string{$i});
            switch ($c) {
                case 196: $return .= chr(142); break;
                case 214: $return .= chr(153); break;
                case 220: $return .= chr(154); break;
                case 223: $return .= chr(225); break;
                case 228: $return .= chr(132); break;
                case 246: $return .= chr(148); break;
                case 252: $return .= chr(129); break;
                default: $return .= chr($c);
            }
        }
 
        return $return;
    }
}