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Bug #24218 mb_convert_encoding weirdness
Submitted: 2003-06-17 02:55 UTC Modified: 2003-06-26 18:22 UTC
From: mark at lange dot demon dot co dot uk Assigned:
Status: No Feedback Package: mbstring related
PHP Version: 4.3.2 OS: Win32
Private report: No CVE-ID: None
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 [2003-06-17 02:55 UTC] mark at lange dot demon dot co dot uk
A piece of code that was working perfectly correctly with PHP version 4.2.3 is now displaying erroneous characters for PHP 4.3.2.

The script in question is a translation form, displaying two languages which may use different charsets.
The code determines the appropriate charset to use for the html header from the two languages. If the charsets are the same, no problem. If they are different, it tests whther the mbstring module is enabled, in which case it uses 'UTF-8' for the html header; otherwise it uses the charset for the second language.

If mbstring was enabled, then the code uses the mb_convert_encoding function to convert the text strings for display to UTF-8...

Reproduce code:
$basecharset =  'ISO-8859-1';
$charset = 'ISO-8859-2';

$convertcharsets = ($basecharset != $charset);
if ($convertcharsets) {
   if (function_exists('mb_convert_encoding')) {
   } else {
      $convertcharsets = false;
} else {

echo charsetText('Fran?ais',$convertcharset,$basecharset)
echo '<br />';
echo charsetText('Polska',$convertcharset,$charset)
echo '<br />';

function charsetText($text,$convertcharset,$fromcharset)
   $returntext = $text;
   if ($convertcharset) { $returntext = mb_convert_encoding($returntext,"UTF-8",$fromcharset); }
   return $returntext;
} // function charsetText()

Expected result:

Actual result:

The first odd character in FranXXais is A with a tilde; the second is the HTML &sect; character


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 [2003-06-17 05:42 UTC]
Please provide a complete but short example script.

 [2003-06-17 06:37 UTC]
That looks more like the browser issue.

Probably you have to explicitly indicate the charset(encoding) of the page content being dispatched to the browser either by <META> tag or by "Content-Type" header;

-- example 1 --

$output_charset = "UTF-8";
header("Content-Type: text/html; charset=$output_charset");
$iso_8859_1 = "Fran?ais";
print mb_convert_encoding($iso_8859_1, $output_charset, "iso-8859-1");

-- example 2 --
$output_charset = "UTF-8";
<?php print "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=$output_charset\">"; ?>
$iso_8859_1 = "Fran?ais";
print mb_convert_encoding($iso_8859_1, $output_charset, "iso-8859-1");

 [2003-06-26 18:22 UTC]
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Open". Thank you.

 [2007-09-30 15:13 UTC] fkl at tfu dot jgfi
forex     ??ј?
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