php unicode编码和字符串互转

php字符串转Unicode编码, Unicode编码转php字符

百度了很多,都一样, 要么不对, 要不就是只是把字符串的汉字转Unicode

经过多次试验查找, 找到了如下方法,

注意:字符串编码必须是utf-8,如果不是自行用icon转一下

//字符串转Unicode编码
function unicode_encode($strLong) {
  $strArr = preg_split('/(?<!^)(?!$)/u', $strLong);//拆分字符串为数组(含中文字符)
  $resUnicode = '';
  foreach ($strArr as $str)
  {
      $bin_str = '';
      $arr = is_array($str) ? $str : str_split($str);//获取字符内部数组表示,此时$arr应类似array(228, 189, 160)
      foreach ($arr as $value)
      {
          $bin_str .= decbin(ord($value));//转成数字再转成二进制字符串,$bin_str应类似111001001011110110100000,如果是汉字"你"
      }
      $bin_str = preg_replace('/^.{4}(.{4}).{2}(.{6}).{2}(.{6})$/', '$1$2$3', $bin_str);//正则截取, $bin_str应类似0100111101100000,如果是汉字"你"
      $unicode = dechex(bindec($bin_str));//返回unicode十六进制
      $_sup = '';
      for ($i = 0; $i < 4 - strlen($unicode); $i++)
      {
          $_sup .= '0';//补位高字节 0
      }
      $str =  '\\u' . $_sup . $unicode; //加上 \u  返回
      $resUnicode .= $str;
  }
  return $resUnicode;
}
//Unicode编码转字符串方法1
function unicode_decode($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 $name;
}
//Unicode编码转字符串
function unicode_decode2($str){
  $json = '{"str":"' . $str . '"}';
  $arr = json_decode($json, true);
  if (empty($arr)) return '';
  return $arr['str'];
}


echo unicode_encode('若水小站:qq963087326'),'<br>';
//结果\u82e5\u6c34\u5c0f\u7ad9\u003a\u0071\u0071\u0039\u0036\u0033\u0030\u0038\u0037\u0033\u0032\u0036

echo unicode_decode('\u82e5\u6c34\u5c0f\u7ad9\u003a\u0071\u0071\u0039\u0036\u0033\u0030\u0038\u0037\u0033\u0032\u0036');
//结果若水小站:qq963087326

参考地址
https://www.cnblogs.com/cmnull/p/10030899.html
https://www.jb51.net/article/104925.htm
(脚本之家网站,里面的unicode_encode字符串转Unicode,经本人测试"小"字不对)