php处理emoji表情符号

• 2016-06-27
• 2027 View

表情符号的存储，一般的utf8字段无法直接存储，可以先urlencode，取出来显示的时候先做urldecode

表情符号的显示，参考项目：https://github.com/iamcal/php-emoji

引用上述开源项目的类库后，执行下面的函数：

function parseHtmlemoji ($text)
    {
        $tmpStr = json_encode($text);
        $tmpStr = preg_replace("#(\\\ue[0-9a-f]{3})#ie", "addslashes('\\1')",
        $tmpStr);
        $text = json_decode($tmpStr);
        preg_match_all("#u([0-9a-f]{4})+#iUs", $text, $rs);
        if (empty($rs[1])) {
            return $text;
        }
        foreach ($rs[1] as $v) {
            $test_iphone = '0x' . trim(strtoupper($v));
            $test_iphone = $test_iphone + 0;
            $t = emoji_unified_to_html(emoji_softbank_to_unified($this->utf8_bytes($test_iphone)));
            $text = str_replace("\u$v", $t, $text);
        }
        return $text;
    }
    
    function utf8_bytes ($cp)
    {
        if ($cp > 0x10000) {
            # 4 bytes
            return chr(0xF0 | (($cp & 0x1C0000) >> 18)) .
             chr(0x80 | (($cp & 0x3F000) >> 12)) .
             chr(0x80 | (($cp & 0xFC0) >> 6)) . chr(0x80 | ($cp & 0x3F));
        } else
            if ($cp > 0x800) {
                # 3 bytes
                return chr(0xE0 | (($cp & 0xF000) >> 12)) .
                 chr(0x80 | (($cp & 0xFC0) >> 6)) . chr(0x80 | ($cp & 0x3F));
            } else
                if ($cp > 0x80) {
                    # 2 bytes
                    return chr(0xC0 | (($cp & 0x7C0) >> 6)) .
                     chr(0x80 | ($cp & 0x3F));
                } else {
                    # 1 byte
                    return chr($cp);
                }
    }