PHP: Convert Extended Ascii file to UTF-8 - php

i don't have any chance to get a valid utf-8 as output...
$fx = file_get_contents("Extended Ascii file.txt"); // example only has chr(129), but could be mixed Extended Ascii + UTF8
// not working:
//$fx = html_entity_decode($fx, ENT_QUOTES, "UTF-8");
//$fx = mb_convert_encoding($fx, 'UTF-8', 'ASCII');
//$fx = utf8_encode($fx);
//$fx = iconv('ASCII', 'UTF-8//IGNORE', $fx);
echo '"chr('.ord($fx[0]).')"=>"'.$fx[0].'"<br><br>'; // result: "chr(129)"=>"�"
$fx = strtr($fx, [chr(128)=>'Ç',chr(129)=>'ü',chr(130)=>'é',chr(131)=>'â',chr(132)=>'ä',chr(133)=>'à',chr(134)=>'å',chr(135)=>'ç',chr(136)=>'ê',chr(137)=>'ë',chr(138)=>'è',chr(139)=>'ï',chr(140)=>'î',chr(141)=>'ì',chr(142)=>'Ä',chr(143)=>'Å',chr(144)=>'É',chr(145)=>'æ',chr(146)=>'Æ',chr(147)=>'ô',chr(148)=>'ö',chr(149)=>'ò',chr(150)=>'û',chr(151)=>'ù',chr(152)=>'ÿ',chr(153)=>'Ö',chr(154)=>'Ü',chr(155)=>'ø',chr(156)=>'£',chr(157)=>'Ø',chr(158)=>'×',chr(159)=>'ƒ',chr(160)=>'á',chr(161)=>'í',chr(162)=>'ó',chr(163)=>'ú',chr(164)=>'ñ',chr(165)=>'Ñ',chr(166)=>'ª',chr(167)=>'º',chr(168)=>'¿',chr(169)=>'®',chr(170)=>'¬',chr(171)=>'½',chr(172)=>'¼',chr(173)=>'¡',chr(174)=>'«',chr(175)=>'»',chr(176)=>'░',chr(177)=>'▒',chr(178)=>'▓',chr(179)=>'│',chr(180)=>'┤',chr(181)=>'Á',chr(182)=>'Â',chr(183)=>'À',chr(184)=>'©',chr(185)=>'╣',chr(186)=>'║',chr(187)=>'╗',chr(188)=>'╝',chr(189)=>'¢',chr(190)=>'¥',chr(191)=>'┐',chr(192)=>'└',chr(193)=>'┴',chr(194)=>'┬',chr(195)=>'├',chr(196)=>'─',chr(197)=>'┼',chr(198)=>'ã',chr(199)=>'Ã',chr(200)=>'╚',chr(201)=>'╔',chr(202)=>'╩',chr(203)=>'╦',chr(204)=>'╠',chr(205)=>'═',chr(206)=>'╬',chr(207)=>'¤',chr(208)=>'ð',chr(209)=>'Ð',chr(210)=>'Ê',chr(211)=>'Ë',chr(212)=>'È',chr(213)=>'ı',chr(214)=>'Í',chr(215)=>'Î',chr(216)=>'Ï',chr(217)=>'┘',chr(218)=>'┌',chr(219)=>'█',chr(220)=>'▄',chr(221)=>'¦',chr(222)=>'Ì',chr(223)=>'▀',chr(224)=>'Ó',chr(225)=>'ß',chr(226)=>'Ô',chr(227)=>'Ò',chr(228)=>'õ',chr(229)=>'Õ',chr(230)=>'µ',chr(231)=>'þ',chr(232)=>'Þ',chr(233)=>'Ú',chr(234)=>'Û',chr(235)=>'Ù',chr(236)=>'ý',chr(237)=>'Ý',chr(238)=>'¯',chr(239)=>'´',chr(240)=>'≡',chr(241)=>'±',chr(242)=>'‗',chr(243)=>'¾',chr(244)=>'¶',chr(245)=>'§',chr(246)=>'÷',chr(247)=>'¸',chr(248)=>'°',chr(249)=>'¨',chr(250)=>'·',chr(251)=>'¹',chr(252)=>'³',chr(253)=>'²',chr(254)=>'■',chr(255)=>'nbsp']);
echo '"chr('.ord($fx[0]).')"=>"'.$fx[0].'"<br><br>'; // result: "chr(195)"=>"�"
How to convert or remove � ?
28.05.2020 Update: Solution found, thanks to Andrea Pollini!
Some notes:
iconv('UTF-8', 'UTF-8//IGNORE', $fx); // IGNORE is broken in PHP since - https://www.php.net/manual/en/function.iconv.php#108643 - use mb_convert_encoding
Here was my real problem (i figured it out later after many tests):
$P["T"] .= $text; // here was the problem, array is converting strings... (don't know why?)
changed to:
ini_set('mbstring.substitute_character', "none"); // mb_convert_encoding set remove unknown
$P["T"] .= mb_convert_encoding($text, 'UTF-8', 'UTF-8');
Now it's working. But if somebody knows why arrays are converting strings and how to disable that, would be great. :)


first configure in order to discard extended characters
<?php
ini_set('mbstring.substitute_character', "none");
?>
next you can use mb_convert_encoding
mb_convert_encoding($fx, "UTF-8", mb_detect_encoding($fx, "UTF-8, ISO-8859-1, ISO-8859-15", true));
you can add the encoding you need in mb_detect_encoding

Related

How to convert ASCII to ISO-8859-1 in PHP?

I'm currently trying to figure out how to convert an ASCII encoded string to ISO-8859-1 encoding to be used for utf8_encode() to display special characters like "ñ" but I can't seem to make it work. In need of help.
I've already tried this iconv(mb_detect_encoding($text, mb_detect_order(), true), "ISO-8859-1", $text); and this mb_convert_encoding($text, "ISO-8859-1"); and also this mb_convert_encoding($text, "ASCII", "ISO-8859-1"); but it doesn't work, the string is still ASCII encoded.
I've created a temporary solution for this by creating a lookup table using the string provided by reading each character of the string. But I want to use the php built-in functions, is this possible?
Here is my code:
<?php
function convertString($text) {
$text = iconv(mb_detect_encoding($text, mb_detect_order(), true), "ISO-8859-1", $text);
echo mb_detect_encoding($text) .'<br/>'; // to check what encoding the string is in, displays ASCII
return utf8_encode($text);
}
echo convertString('\xc3\xb1');
?>

Converting Window-1252 to UTF-8 Issue

I have created a function to convert the following text to UTF-8, as it appeared to be in Windows-1252 format, due to being copied to a database table from a Word Document.
Testing weird character’s correction
This seems to fix the dodgy ’ character. However i'm not getting � in the following:
Devon�s most prominent dealerships
When passing the following through the same function:
Devon's most prominent dealerships
Below is the code which does the converting:
function Windows1252ToUTF8($text) {
return mb_convert_encoding($text, "Windows-1252", "UTF-8");
}
Edit:
The database can't be changed due to holding thousands of custom records. I tried the below but the mb_detect_encoding thinks character’s correction is UTF-8.
function Windows1252ToUTF8($text) {
if (mb_detect_encoding($text) == "UTF-8") {
return $text;
}
return mb_convert_encoding($text, "Windows-1252", "UTF-8");
}
Edit 2:
Just tried the example from the PHP Documentation:
$str = 'áéóú'; // ISO-8859-1
echo "<pre>";
var_dump(mb_detect_encoding($str, 'UTF-8')); // 'UTF-8'
var_dump(mb_detect_encoding($str, 'UTF-8', true)); // false
echo "</pre>";
die();
but this simply outputs:
string(5) "UTF-8"
string(5) "UTF-8"
So I can't even detect the encoding of the string :S
Edit 3:
This seems to do the trick:
function Windows1252ToUTF8($text) {
$badChars = [ "â", "á", "ú", "é", "ó" ];
$match = preg_match("/[".join("",$badChars)."]/", $text);
if ($match) {
return mb_convert_encoding($text, "Windows-1252", "UTF-8");
}
return $text;
}
Edit 4:
I have matched the hex values to their corresponding values. However when I get to the weird characters they don't appear to match.

Converting Testing weird character’s correction using bin2hex
gives me
54657374696e6720776569726420636861726163746572c3a2e282ace284a27320636f7272656374696f6e
This means the "’" is actually the bytes \xc3\xa2\xe2\x82\xac\xe2\x84\xa2. This is a typical sign of a UTF-8 string having been interpreted as Windows Latin-1/1252, and then re-encoded to UTF-8.
’ (UTF-8 \xe2\x80\x99)
→ bytes interpreted as Latin-1 equal the string ’
→ characters encoded to UTF-8 result in \xc3\xa2\xe2\x82\xac\xe2\x84\xa2
To restore the original, you need to reverse that chain of mis-encodings:
$s = "\xc3\xa2\xe2\x82\xac\xe2\x84\xa2";
echo mb_convert_encoding($s, 'Windows-1252', 'UTF-8');
This interprets the string as UTF-8, converts it to the Windows-1252 equivalent, which is then the valid UTF-8 representation of ’.
Preferably you figure out at what point the encoding screwed up like this and you stop that from happening in the future. If it happened by "copy and pasting from Word", then basically somebody pasted garbage into your database and you need to fix the workflow with Word somehow. Otherwise there may be an incorrect encoding-conversion step somewhere in your code which you need to fix.

The following seems to do the trick. Not the way I wanted it to work by checking for specific characters, but it does the trick.
function Windows1252ToUTF8($text) {
$badChars = [ "â", "á", "ú", "é", "ó" ];
$match = preg_match("/[".join("",$badChars)."]/", $text);
if ($match) {
return mb_convert_encoding($text, "Windows-1252", "UTF-8");
}
return $text;
}
Edit:
function Windows1252ToUTF8($text) {
// http://www.fileformat.info/info/charset/UTF-8/list.htm
$illegal_hex = [ "c3a2", "c3a1", "c3ba", "c3a9", "c3b3" ];
$match = preg_match("/".join("|",$illegal_hex)."/", bin2hex($text));
if ($match) {
return mb_convert_encoding($text, "Windows-1252", "UTF-8");
}
return $text;
}

PHP Default String Encoding

Could someone explain why the output is ASCII in the last three tests below?
I get the same results on my own system, PHPTester.net, and PhpFiddle.org.
echo mb_internal_encoding(); // UTF-8
$str = 'foobar';
echo mb_check_encoding($str, 'UTF-8'); // true
echo mb_detect_encoding($str); // ASCII
$encoded = utf8_encode($str);
echo mb_detect_encoding($encoded); // ASCII
$converted = mb_convert_encoding($str, 'UTF-8');
echo mb_detect_encoding($converted); // ASCII

That would be because there are no characters in foobar that cannot be represented in ASCII.
mb_check_encoding($str, 'UTF-8') works because ASCII text is innately compatible with UTF-8 (deliberately so)
But in the absence of multi-byte characters, there's no discernible difference between the two. Proof of this: 'foobar' === utf8_encode('foobar') // true

Convert utf8/mixed to utf8 and strip non ascii chars

How to convert utf8 strings to iso 8859-1?
Why doesn't imap_mime_header_decode detect the utf8 coded string?
I need to remove all 4 byte unicode chars so the string fits in mysql utf8
Have tried this but it doesn't work
$text = mb_convert_encoding($text, 'UTF-8', 'UTF-8');
code
$input = '=?UTF-8?Q?=c3=b8en?=';
echo "$input\n";
$output = '';
foreach(imap_mime_header_decode($input) as $element){
if($element->charset == 'utf-8'){
echo "utf8 charset = $element->text\n";
$output .= $element->text;
}
else{
echo "default charset = $element->text\n";
$output .= $element->text;
}
}
// Here output should be iso 8859-1
echo "$output\n";
$string = preg_replace('/[^a-zæøåA-ZÆØÅ0-9 \-\.,:]/', '', $output);
// Back to utf8
$string = utf8_encode($string);
echo "$string\n";
output
=?UTF-8?Q?=c3=b8en?=
default charset = øen
øen
en

I came up with this solution.. First it converts to utf-8 (including 4 byte unicode chars), then converts to iso 8859-1 and then stripping unwanted chars and then finally encoding to utf-8
:D
private function strip_non_ascii($string){
$return = '';
if(preg_match('/^=\?(iso-8859-1|utf-8)\?q\?/i', $string)){
$return = str_replace('_',' ', mb_decode_mimeheader($string));
}
elseif(preg_match('/^(iso-8859-1\'\')(.*)$/i', $string, $matches)){
$return = utf8_encode(rawurldecode($matches[2]));
}
else{
$return = imap_utf8($string);
}
return utf8_encode(preg_replace('/[^a-zæøåA-ZÆØÅ0-9 \-\.,:]/', '', utf8_decode($return)));
}

Use htmlentities() to convert the special characters to HTML entities. You can optionally specify an encoding of the source string, which is encouraged to specify. In your case, this would be 'UTF-8'. The HTML entities are safe to store in a database and are safe to output in their escaped form, although you may choose to use html_entity_decode to convert as many characters as possible back to an encoding of your choice.

write a php function which works for any lanuage

I'm writing a function to clear text which works with or without ut8 characters.
I keep getting text like this.
Coventry Salary - �25,000 - �35,000
but with this function it removes the � but leaves other.
I want to know if anyone wrote a function which cleans the text.
function convertHTMLSpecialChars ( $str='' )
{
$str = htmlspecialchars ( $str );
$str = mb_convert_encoding($str, 'UTF-8', mb_detect_encoding($str));
$str = htmlspecialchars($str, ENT_NOQUOTES, 'UTF-8');
return $str;
}

this function:
$str = mb_convert_encoding($str, 'UTF-8', mb_detect_encoding($str));
just tries to detect the character set from $str; if it finds that $str contains
utf8 characters it will return "utf8" so the func will be actually:
$str = mb_convert_encoding($str, 'UTF-8', 'UTF-8');
which doesnt help much..
in my opinion you should give the character set of your string by hand.
for example, if its turkish: iso-8859-5, if its greek: iso-8859-7 and so..

Make sure the server outputs your page as UTF-8.
You can force it by using:
header ('Content-type: text/html; charset=utf-8');

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