PHP 7 Alpine Image + Iconv Problem

[p-le]

I'm using php7 alpine image and install iconv extension as follow

RUN docker-php-ext-install pdo pdo_mysql iconv

• Checking iconv installed properly

php -i | grep iconv

Registered Stream Filters => zlib.*, convert.iconv.*, string.rot13, string.toupper, string.tolower, string.strip_tags, convert.*, consumed, dechunk
iconv
iconv support => enabled
iconv implementation => unknown
iconv library version => unknown
iconv.input_encoding => no value => no value
iconv.internal_encoding => no value => no value
iconv.output_encoding => no value => no value

• Create a simple php file to test

<?php
mb_language('Japanese');
mb_internal_encoding('UTF-8');

$file = $argv[1];
$fh = fopen($file, 'r');
if ($fh === false) {
    die('Could not open file.');
}
var_dump( stream_get_filters());
$sh = stream_filter_prepend($fh, 'convert.iconv.utf-8/cp932', STREAM_FILTER_READ);
if ($sh === false) {
    fclose($fh);
    die('Counld not apply stream filter.');
}

while (($line = fgets($fh)) !== false) {
    echo $line;
}

fclose($fh);
?>

• Create a test text file
• Running

php test.php test.txt

Warning: stream_filter_prepend(): unable to create or locate filter "convert.iconv.utf-8/cp932" in /dashboard/test.php on line 10

I guess that iconv extension has something wrong with UTF-8 and CP932 encode. I'm using this code for creating japanese csv file.

[wernight]

I think it should upgrade to alpine:3.6 as iconv support as been improved (forgot in which version). //TRANSLITERA and //IGNORE are still not implemented though.

[tianon]

Duplicate of #240. 👍

[solody]

so what to do

[tsadiq]

I came for the same question and i guess my answer will be to use debian instead of alpine cause it actually work there 😒

[tsadiq]

This could be helpful tho 😊
#240 (comment)