mysql查询数据库中16进制中文内容

function unicode_encode($str, $encoding = 'GBK', $prefix = '&#', $postfix = ';') {
    $str = iconv($encoding, 'UCS-2', $str);
    $arrstr = str_split($str, 2);
    $unistr = '';
    for($i = 0, $len = count($arrstr); $i < $len; $i++) {
        $dec = bin2hex($arrstr[$i]);
        $decarr=str_split($dec);
        $dec=$decarr[2].$decarr[3].$decarr[0].$decarr[1];
        $unistr .= $prefix . $dec . $postfix;
    }
    return $unistr;
}

$keywords_unistr = unicode_encode($_GPC["keywords"],'UTF-8','u','\\\\\\\\');
$condition.=" and content like '%".$keywords_unistr."%' ";