PHPUnicode编码相互转换的例子-PHP源码

 0) {
            if (ord(substr($str, $cind, 1)) <0xA1) { //如果为英文则取1个字节 
                array_push($arr_cont, substr($str, $cind, 1));
                $cind++;
            } else {
                array_push($arr_cont, substr($str, $cind, 2));
                $cind+=2;
            }
        }
    }
    foreach ($arr_cont as &$row) {
        $row = iconv("gb2312", "UTF-8", $row);
    }
    //转换Unicode码
    foreach ($arr_cont as $key => $value) {
        $unicodestr.= $prefix . base_convert(bin2hex(iconv(&＃39;utf-8&＃39;, &＃39;UCS-4&＃39;, $value)), 16, 10) .$postfix;
    }
    return $unicodestr;
}
/**
* $str Unicode编码后的字符串
* $decoding 原始字符串的编码，默认utf-8
* $prefix 编码字符串的前缀，默认"&＃"
* $postfix 编码字符串的后缀，默认";"
*/
function unicode_decode($unistr, $encoding = &＃39;utf-8&＃39;, $prefix = &＃39;&＃&＃39;, $postfix = &＃39;;&＃39;) {
    $arruni = explode($prefix, $unistr);
    $unistr = &＃39;&＃39;;
    for ($i = 1, $len = count($arruni); $i <$len; $i++) {
        if (strlen($postfix) > 0) {
            $arruni[$i] = substr($arruni[$i], 0, strlen($arruni[$i]) - strlen($postfix));
        }
        $temp = intval($arruni[$i]);
        $unistr .= ($temp <256) ? chr(0) . chr($temp) : chr($temp / 256) . chr($temp % 256);
    }
    return iconv(&＃39;UCS-2&＃39;, $encoding, $unistr);
}
$str = "PHP二次开发：www.php2.cc";
$unistr = unicode_encode($str);
$unistr2 = unicode_decode($unistr);
echo $unistr . &＃39;
&＃39;;
echo $unistr2 . &＃39;
&＃39;;
$unistr = unicode_encode($str,&＃39;GBK&＃39;,&＃39;\\u&＃39;);
$unistr2 = unicode_decode($unistr,&＃39;GBK&＃39;,&＃39;\\u&＃39;);
echo $unistr . &＃39;
&＃39;;
echo $unistr2 . &＃39;
&＃39;;