https://stackoverflow.com/questions/23140358
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<?php
class Encoding {
protected static $win1252ToUtf8 = array(
128 => "\xe2\x82\xac",
130 => "\xe2\x80\x9a",
131 => "\xc6\x92",
132 => "\xe2\x80\x9e",
133 => "\xe2\x80\xa6",
134 => "\xe2\x80\xa0",
135 => "\xe2\x80\xa1",
136 => "\xcb\x86",
137 => "\xe2\x80\xb0",
138 => "\xc5\xa0",
139 => "\xe2\x80\xb9",
140 => "\xc5\x92",
142 => "\xc5\xbd",
145 => "\xe2\x80\x98",
146 => "\xe2\x80\x99",
147 => "\xe2\x80\x9c",
148 => "\xe2\x80\x9d",
149 => "\xe2\x80\xa2",
150 => "\xe2\x80\x93",
151 => "\xe2\x80\x94",
152 => "\xcb\x9c",
153 => "\xe2\x84\xa2",
154 => "\xc5\xa1",
155 => "\xe2\x80\xba",
156 => "\xc5\x93",
158 => "\xc5\xbe",
159 => "\xc5\xb8"
);
protected static $brokenUtf8ToUtf8 = array(
"\xc2\x80" => "\xe2\x82\xac",
"\xc2\x82" => "\xe2\x80\x9a",
"\xc2\x83" => "\xc6\x92",
"\xc2\x84" => "\xe2\x80\x9e",
"\xc2\x85" => "\xe2\x80\xa6",
"\xc2\x86" => "\xe2\x80\xa0",
"\xc2\x87" => "\xe2\x80\xa1",
"\xc2\x88" => "\xcb\x86",
"\xc2\x89" => "\xe2\x80\xb0",
"\xc2\x8a" => "\xc5\xa0",
"\xc2\x8b" => "\xe2\x80\xb9",
"\xc2\x8c" => "\xc5\x92",
"\xc2\x8e" => "\xc5\xbd",
"\xc2\x91" => "\xe2\x80\x98",
"\xc2\x92" => "\xe2\x80\x99",
"\xc2\x93" => "\xe2\x80\x9c",
"\xc2\x94" => "\xe2\x80\x9d",
"\xc2\x95" => "\xe2\x80\xa2",
"\xc2\x96" => "\xe2\x80\x93",
"\xc2\x97" => "\xe2\x80\x94",
"\xc2\x98" => "\xcb\x9c",
"\xc2\x99" => "\xe2\x84\xa2",
"\xc2\x9a" => "\xc5\xa1",
"\xc2\x9b" => "\xe2\x80\xba",
"\xc2\x9c" => "\xc5\x93",
"\xc2\x9e" => "\xc5\xbe",
"\xc2\x9f" => "\xc5\xb8"
);
protected static $utf8ToWin1252 = array(
"\xe2\x82\xac" => "\x80",
"\xe2\x80\x9a" => "\x82",
"\xc6\x92" => "\x83",
"\xe2\x80\x9e" => "\x84",
"\xe2\x80\xa6" => "\x85",
"\xe2\x80\xa0" => "\x86",
"\xe2\x80\xa1" => "\x87",
"\xcb\x86" => "\x88",
"\xe2\x80\xb0" => "\x89",
"\xc5\xa0" => "\x8a",
"\xe2\x80\xb9" => "\x8b",
"\xc5\x92" => "\x8c",
"\xc5\xbd" => "\x8e",
"\xe2\x80\x98" => "\x91",
"\xe2\x80\x99" => "\x92",
"\xe2\x80\x9c" => "\x93",
"\xe2\x80\x9d" => "\x94",
"\xe2\x80\xa2" => "\x95",
"\xe2\x80\x93" => "\x96",
"\xe2\x80\x94" => "\x97",
"\xcb\x9c" => "\x98",
"\xe2\x84\xa2" => "\x99",
"\xc5\xa1" => "\x9a",
"\xe2\x80\xba" => "\x9b",
"\xc5\x93" => "\x9c",
"\xc5\xbe" => "\x9e",
"\xc5\xb8" => "\x9f"
);
static function toUTF8($text){
/**
* Function Encoding::toUTF8
*
* This function leaves UTF-8 characters alone, while converting
* almost all non-UTF8 to UTF8.
*
* It assumes that the encoding of the original string is
* either Windows-1252 or ISO 8859-1.
*
* It may fail to convert characters to UTF-8 if they fall
* into one of these scenarios:
*
* 1) when any of these characters: ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞß
* are followed by any of these: ("group B")
* ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶•¸¹º»¼½¾¿
*
* For example: %ABREPRESENT%C9%BB. «REPRESENTÉ»
* The "«" (%AB) character will be converted, but the "É"
* followed by "»" (%C9%BB) is also a valid unicode
* character, and will be left unchanged.
*
* 2) when any of these: àáâãäåæçèéêëìíîï are followed by TWO
* characters from group B,
*
* 3) when any of these: ðñòó are followed by THREE
* characters from group B.
*
* @name toUTF8
* @param string $text Any string.
* @return string The same string, UTF-8 encoded
*
*/
if(is_array($text))
{
foreach($text as $k => $v)
{
$text[$k] = self::toUTF8($v);
}
return $text;
} elseif(is_string($text)) {
$max = strlen($text);
$buf = "";
for($i = 0; $i < $max; $i++){
$c1 = $text{$i};
if($c1>="\xc0"){ // Should be converted to UTF-8, if it's not UTF-8 already
$c2 = $i+1 >= $max? "\x00" : $text{$i+1};
$c3 = $i+2 >= $max? "\x00" : $text{$i+2};
$c4 = $i+3 >= $max? "\x00" : $text{$i+3};
if($c1 >= "\xc0" & $c1 <= "\xdf"){ // Looks like 2 bytes UTF-8
if($c2 >= "\x80" && $c2 <= "\xbf"){ // Yeah, almost sure it's UTF-8 already
$buf .= $c1 . $c2;
$i++;
} else { // Not valid UTF-8. Convert it.
$cc1 = (chr(ord($c1) / 64) | "\xc0");
$cc2 = ($c1 & "\x3f") | "\x80";
$buf .= $cc1 . $cc2;
}
} elseif($c1 >= "\xe0" & $c1 <= "\xef"){ // Looks like 3 bytes UTF-8
if($c2 >= "\x80" && $c2 <= "\xbf" && $c3 >= "\x80" && $c3 <= "\xbf"){ // Yeah, almost sure it's UTF-8 already
$buf .= $c1 . $c2 . $c3;
$i = $i + 2;
} else { // Not valid UTF-8. Convert it.
$cc1 = (chr(ord($c1) / 64) | "\xc0");
$cc2 = ($c1 & "\x3f") | "\x80";
$buf .= $cc1 . $cc2;
}
} elseif($c1 >= "\xf0" & $c1 <= "\xf7"){ // Looks like 4 bytes UTF-8
if($c2 >= "\x80" && $c2 <= "\xbf" && $c3 >= "\x80" && $c3 <= "\xbf" && $c4 >= "\x80" && $c4 <= "\xbf"){ // Yeah, almost sure it's UTF-8 already
$buf .= $c1 . $c2 . $c3;
$i = $i + 2;
} else { // Not valid UTF-8. Convert it.
$cc1 = (chr(ord($c1) / 64) | "\xc0");
$cc2 = ($c1 & "\x3f") | "\x80";
$buf .= $cc1 . $cc2;
}
} else { // It doesn't look like UTF-8, but should be converted
$cc1 = (chr(ord($c1) / 64) | "\xc0");
$cc2 = (($c1 & "\x3f") | "\x80");
$buf .= $cc1 . $cc2;
}
} elseif(($c1 & "\xc0") == "\x80"){ // Needs conversion
if(isset(self::$win1252ToUtf8[ord($c1)])) { // Found in Windows 1252 special cases
$buf .= self::$win1252ToUtf8[ord($c1)];
} else {
$cc1 = (chr(ord($c1) / 64) | "\xc0");
$cc2 = (($c1 & "\x3f") | "\x80");
$buf .= $cc1 . $cc2;
}
} else { // It doesn't need convesion
$buf .= $c1;
}
}
return $buf;
} else {
return $text;
}
}
static function toWin1252($text) {
if(is_array($text)) {
foreach($text as $k => $v) {
$text[$k] = self::toWin1252($v);
}
return $text;
} elseif(is_string($text)) {
return utf8_decode(str_replace(array_keys(self::$utf8ToWin1252), array_values(self::$utf8ToWin1252), self::toUTF8($text)));
} else {
return $text;
}
}
static function toISO8859($text) {
return self::toWin1252($text);
}
static function toLatin1($text) {
return self::toWin1252($text);
}
static function fixUTF8($text){
if(is_array($text)) {
foreach($text as $k => $v) {
$text[$k] = self::fixUTF8($v);
}
return $text;
}
$last = "";
while($last <> $text){
$last = $text;
$text = self::toUTF8(utf8_decode(str_replace(array_keys(self::$utf8ToWin1252), array_values(self::$utf8ToWin1252), $text)));
}
$text = self::toUTF8(utf8_decode(str_replace(array_keys(self::$utf8ToWin1252), array_values(self::$utf8ToWin1252), $text)));
return $text;
}
static function UTF8FixWin1252Chars($text){
// If you received an UTF-8 string that was converted
// from Windows-1252 as it was ISO8859-1
// (ignoring Windows-1252 chars from 80 to 9F) use
// this function to fix it.
// See: http://en.wikipedia.org/wiki/Windows-1252
return str_replace(array_keys(self::$brokenUtf8ToUtf8), array_values(self::$brokenUtf8ToUtf8), $text);
}
static function removeBOM($str=""){
if(substr($str, 0,3) == pack("CCC",0xef,0xbb,0xbf)) {
$str=substr($str, 3);
}
return $str;
}
}
?>
For using it, you need to include the script with this class and use it like:
Encoding::toUtf8('Bankdrücken');
