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Json_encode encodes Unicode (copyright) character strings as null?

I am having problems with special JSON encoding characters. These characters are usually displayed on my computer, in Notepad, in browsers, and even in my database. However, they do not encode JSON. An example is as follows:

<?
$array['copyright_str'] = "Copyright site.com © 2011-2012";
echo json_encode($array);
?>

The copyright symbol after site.com is what makes the JSON echo like {"copyright_str":null}. Although it's simple, I have users entering profile data into a database, which can be anything. When one of these funky characters appears, it breaks the situation. What is a good solution to this problem? The API coding I pretty much depends on returning data from the database and printing the strings as a whole as JSON.

My Multibyte settings are as follows:

     php -e phpinfo.php  | grep mb
    Configure Command =>  './configure'  '--enable-bcmath' '--enable-calendar' '--enable-dbase' '--enable-exif' '--enable-ftp' '--enable-gd-native-ttf' '--enable-libxml' '--enable-magic-quotes' '--enable-mbstring' '--enable-pdo=shared' '--enable-sockets' '--enable-zip' '--prefix=/usr/local' '--with-apxs2=/usr/local/apache/bin/apxs' '--with-bz2' '--with-curl=/opt/curlssl/' '--with-curlwrappers' '--with-freetype-dir=/usr' '--with-gd' '--with-imap=/opt/php_with_imap_client/' '--with-imap-ssl=/usr' '--with-jpeg-dir=/usr' '--with-kerberos' '--with-libdir=lib64' '--with-libexpat-dir=/usr' '--with-libxml-dir=/opt/xml2/' '--with-mcrypt=/opt/libmcrypt/' '--with-mhash=/opt/mhash/' '--with-mysql=/usr' '--with-mysql-sock=/var/lib/mysql/mysql.sock' '--with-mysqli=/usr/bin/mysql_config' '--with-openssl=/usr' '--with-openssl-dir=/usr' '--with-pcre-regex=/opt/pcre' '--with-pdo-mysql=shared' '--with-pdo-sqlite=shared' '--with-pic' '--with-png-dir=/usr' '--with-sqlite=shared' '--with-ttf' '--with-xmlrpc' '--with-xpm-dir=/usr' '--with-zlib' '--with-zlib-dir=/usr'
    xmlrpc_error_number => 0 => 0
    mbstring
    Multibyte string engine => libmbfl
    mbstring extension makes use of "streamable kanji code filter and converter", which is distributed under the GNU Lesser General Public License version 2.1.
    mbstring.detect_order => no value => no value
    mbstring.encoding_translation => Off => Off
    mbstring.func_overload => 0 => 0
    mbstring.http_input => pass => pass
    mbstring.http_output => pass => pass
    mbstring.internal_encoding => no value => no value
    mbstring.language => neutral => neutral
    mbstring.strict_detection => Off => Off
    mbstring.substitute_character => no value => no value

, &copy;. .

+5
3

UTF-8 json_encode

<?
    $array['copyright_str'] = utf8_encode("Copyright site.com © 2011-2012");
    echo json_encode($array);
?>
+10

UTF-8

json_encode($return, JSON_UNESCAPED_UNICODE)

. : , , , , , , .. . , ☃:)

+2

Use urlencodeupjson_encode

<?
$array['copyright_str'] = "Copyright site.com © 2011-2012";
$array['copyright_str'] = urlencode($array['copyright_str']);
echo json_encode($array);
?>
-5
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