PHP 的 UNICODE 编码和解码

方法一：

代码语言：javascript复制

function unicode_encode($name)
{
    $name = iconv('UTF-8', 'UCS-2', $name);
    $len = strlen($name);
    $str = '';
    for ($i = 0; $i < $len - 1; $i = $i   2)
    {
        $c = $name[$i];
        $c2 = $name[$i   1];
        if (ord($c) > 0)
        {   //两个字节的文字
            $str .= 'u'.base_convert(ord($c), 10, 16).str_pad(base_convert(ord($c2), 10, 16), 2, 0, STR_PAD_LEFT);
        }
        else
        {
            $str .= $c2;
        }
    }
    return $str;
}

//将UNICODE编码后的内容进行解码
function unicode_decode($name)
{
    //转换编码，将Unicode编码转换成可以浏览的utf-8编码
    $pattern = '/([w] )|(\u([w]{4}))/i';
    preg_match_all($pattern, $name, $matches);
    if (!empty($matches))
    {
        $name = '';
        for ($j = 0; $j < count($matches[0]); $j  )
        {
            $str = $matches[0][$j];
            if (strpos($str, '\u') === 0)
            {
                $code = base_convert(substr($str, 2, 2), 16, 10);
                $code2 = base_convert(substr($str, 4), 16, 10);
                $c = chr($code).chr($code2);
                $c = iconv('UCS-2', 'UTF-8', $c);
                $name .= $c;
            }
            else
            {
                $name .= $str;
            }
        }
    }
    return $name;
}

方法二:

代码语言：javascript复制

function unicode2utf8($str){
    if(!$str) return $str;
    $decode = json_decode($str);
    if($decode) return $decode;
    $str = '["' . $str . '"]';
    $decode = json_decode($str);
    if(count($decode) == 1){
        return $decode[0];
    }
    return $str;
}

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原文出处：Yiiven https://cloud.tencent.com/developer/article/2193080

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