PHP处理微信昵称特殊符号过滤方法

方法一：

protected function removeEmoji($clean_text) {

    $regexEmoticons = '/[\x{1F600}-\x{1F64F}]/u';

    $clean_text = preg_replace($regexEmoticons, '', $clean_text);

    $regexSymbols = '/[\x{1F300}-\x{1F5FF}]/u';

    $clean_text = preg_replace($regexSymbols, '', $clean_text);

    $regexTransport = '/[\x{1F680}-\x{1F6FF}]/u';

    $clean_text = preg_replace($regexTransport, '', $clean_text);

    $regexMisc = '/[\x{2600}-\x{26FF}]/u';

    $clean_text = preg_replace($regexMisc, '', $clean_text);

    $regexDingbats = '/[\x{2700}-\x{27BF}]/u';

    $clean_text = preg_replace($regexDingbats, '', $clean_text);

    return $clean_text;

}

方法二：

preg_replace("/[\x{1F600}-\x{1F64F}\x{1F300}-\x{1F5FF}\x{1F680}-\x{1F6FF}\x{2600}-\x{26FF}\x{2700}-\x{27BF}]/u","","这里是昵称")

方法三：

// 过滤掉emoji表情

function filterEmoji($str){

  $str = preg_replace_callback( '/./u',

      function (array $match) {

        return strlen($match[0]) >= 4 ? '' : $match[0];

      },

      $str);

   return $str;

}