- utf8_decode: documentation ( source)
- json_decode: documentation ( source)
<?php
//echo count(str_split(json_decode('" \u00a0\n\r\t\f\u000b\u200b\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000"')));
//echo iconv_strlen(json_decode('"\u2002\u2003\u2004\u2005\u2006"'));
echo strlen(utf8_decode(json_decode('"\u2002\u2003\u2004\u2005\u2006"')));
echo utf8_decode(json_decode('"\u2002\u2003\u2004\u2005\u2006"'));