ter = array_value($config, 'filter'); $arr = array_value($filter, $type); $enable = array_value($arr, 'enable'); $wordarr = array_value($arr, 'keyword'); if (0 == $enable || empty($wordarr)) return FALSE; foreach ($wordarr as $_keyword) { if (!$_keyword) continue; $r = strpos(strtolower($keyword), strtolower($_keyword)); if (FALSE !== $r) { $error = $_keyword; return TRUE; } } return FALSE; } // return http://domain.com OR https://domain.com function url_prefix() { $http = ((isset($_SERVER['HTTPS']) && 'on' == $_SERVER['HTTPS']) || (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')) ? 'https://' : 'http://'; return $http . $_SERVER['HTTP_HOST']; } // 唯一身份ID function uniq_id() { return uniqid(substr(md5(microtime(true) . mt_rand(1000, 9999)), 8, 8)); } // 生成订单号 14位 function trade_no() { $trade_no = str_replace('.', '', microtime(1)); $strlen = mb_strlen($trade_no, 'UTF-8'); $strlen = 14 - $strlen; $str = ''; if ($strlen) { for ($i = 0; $i <= $strlen; $i++) { if ($i < $strlen) $str .= '0'; } } return $trade_no . $str; } // 生成订单号 16位 function trade_no_16() { $explode = explode(' ', microtime()); $trade_no = $explode[1] . mb_substr($explode[0], 2, 6, 'UTF-8'); return $trade_no; } // 当前年的天数 function date_year($time = NULL) { $time = intval($time) ? $time : time(); return date('L', $time) + 365; } // 当前年份中的第几天 function date_z($time = NULL) { $time = intval($time) ? $time : time(); return date('z', $time); } // 当前月份中的第几天，没有前导零 1 到 31 function date_j($time = NULL) { $time = intval($time) ? $time : time(); return date('j', $time); } // 当前月份中的第几天，有前导零的2位数字 01 到 31 function date_d($time = NULL) { $time = intval($time) ? $time : time(); return date('d', $time); } // 当前时间为星期中的第几天 数字表示 1表示星期一 到 7表示星期天 function date_w_n($time = NULL) { $time = intval($time) ? $time : time(); return date('N', $time); } // 当前日第几周 function date_d_w($time = NULL) { $time = intval($time) ? $time : time(); return date('W', $time); } // 当前几月 没有前导零1-12 function date_n($time = NULL) { $time = intval($time) ? $time : time(); return date('n', $time); } // 当前月的天数 function date_t($time = NULL) { $time = intval($time) ? $time : time(); return date('t', $time); } // 0 o'clock on the day function clock_zero() { return strtotime(date('Ymd')); } // 24 o'clock on the day function clock_twenty_four() { return strtotime(date('Ymd')) + 86400; } // 8点过期 / expired at 8 a.m. function eight_expired($time = NULL) { $time = intval($time) ? $time : time(); // 当前时间大于8点则改为第二天8点过期 $life = date('G') <= 8 ? (strtotime(date('Ymd')) + 28800 - $time) : clock_twenty_four() - $time + 28800; return $life; } // 24点过期 / expired at 24 a.m. function twenty_four_expired($time = NULL) { $time = intval($time) ? $time : time(); $twenty_four = clock_twenty_four(); $life = $twenty_four - $time; return $life; } /** * @param $url 提交地址 * @param string $post POST数组 / 空为GET获取数据 / $post='GET'获取连续跳转最终URL * @param string $cookie cookie * @param int $timeout 超时 * @param int $ms 设为1是毫秒 * @return mixed 返回数据 */ function https_request($url, $post = '', $cookie = '', $timeout = 30, $ms = 0) { if (empty($url)) return FALSE; if (version_compare(PHP_VERSION, '5.2.3', '<')) { $ms = 0; $timeout = 30; } is_array($post) and $post = http_build_query($post); // 没有安装curl 使用http的形式，支持post if (!extension_loaded('curl')) { //throw new Exception('server not install CURL'); if ($post) { return https_post($url, $post, $cookie, $timeout); } else { return http_get($url, $cookie, $timeout); } } is_array($cookie) and $cookie = http_build_query($cookie); $curl = curl_init(); // 返回执行结果，不输出 curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); //php5.5跟php5.6中的CURLOPT_SAFE_UPLOAD的默认值不同 if (class_exists('\CURLFile')) { curl_setopt($curl, CURLOPT_SAFE_UPLOAD, true); } else { defined('CURLOPT_SAFE_UPLOAD') and curl_setopt($curl, CURLOPT_SAFE_UPLOAD, false); } // 设定请求的RUL curl_setopt($curl, CURLOPT_URL, $url); // 设定返回信息中包含响应信息头 if (ini_get('safe_mode') && ini_get('open_basedir')) { // $post参数必须为GET if ('GET' == $post) { // 安全模式时将头文件的信息作为数据流输出 curl_setopt($curl, CURLOPT_HEADER, true); // 安全模式采用连续抓取 curl_setopt($curl, CURLOPT_NOBODY, true); } } else { curl_setopt($curl, CURLOPT_HEADER, false); // 允许跳转10次 curl_setopt($curl, CURLOPT_MAXREDIRS, 10); // 使用自动跳转，返回最后的Location curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true); } $ua1 = 'Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1'; $ua = empty($_SERVER["HTTP_USER_AGENT"]) ? $ua1 : $_SERVER["HTTP_USER_AGENT"]; curl_setopt($curl, CURLOPT_USERAGENT, $ua); // 兼容HTTPS if (FALSE !== stripos($url, 'https://')) { curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE); //ssl版本控制 //curl_setopt($curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1); curl_setopt($curl, CURLOPT_SSLVERSION, true); } $header = array('Content-type: application/x-www-form-urlencoded;charset=UTF-8', 'X-Requested-With: XMLHttpRequest'); $cookie and $header[] = "Cookie: $cookie"; curl_setopt($curl, CURLOPT_HTTPHEADER, $header); if ($post) { // POST curl_setopt($curl, CURLOPT_POST, true); // 自动设置Referer curl_setopt($curl, CURLOPT_AUTOREFERER, true); curl_setopt($curl, CURLOPT_POSTFIELDS, $post); } if ($ms) { curl_setopt($curl, CURLOPT_NOSIGNAL, true); // 设置毫秒超时 curl_setopt($curl, CURLOPT_TIMEOUT_MS, intval($timeout)); // 超时毫秒 } else { curl_setopt($curl, CURLOPT_TIMEOUT, intval($timeout)); // 秒超时 } //优先解析 IPv6 超时后IPv4 //curl_setopt($curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4); curl_setopt($curl, CURLOPT_ENCODING, 'gzip'); // 返回执行结果 $output = curl_exec($curl); // 有效URL，输出URL非URL页面内容 CURLOPT_RETURNTRANSFER 必须为false 'GET' == $post and $output = curl_getinfo($curl, CURLINFO_EFFECTIVE_URL); curl_close($curl); return $output; } function save_image($img) { $ch = curl_init(); // 设定请求的RUL curl_setopt($ch, CURLOPT_URL, $img); // 设定返回信息中包含响应信息头 启用时会将头文件的信息作为数据流输出 //curl_setopt($ch, CURLOPT_HEADER, false); //curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER["HTTP_USER_AGENT"]); // true表示$html,false表示echo $html curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); //curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1); //curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0); curl_setopt($ch, CURLOPT_ENCODING, 'gzip'); $output = curl_exec($ch); curl_close($ch); return $output; } // 计算字串宽度:剧中对齐(字体大小/字串内容/字体链接/背景宽度/倍数) function calculate_str_width($size, $str, $font, $width, $multiple = 2) { $box = imagettfbbox($size, 0, $font, $str); return ($width - $box[4] - $box[6]) / $multiple; } // 搜索目录下的文件 比对文件后缀 function search_directory($path) { if (is_dir($path)) { $paths = scandir($path); foreach ($paths as $val) { $sub_path = $path . '/' . $val; if ('.' == $val || '..' == $val) { continue; } else if (is_dir($sub_path)) { //echo '目录名:' . $val . '
'; search_directory($sub_path); } else { //echo ' 最底层文件: ' . $path . '/' . $val . '
'; $ext = strtolower(file_ext($sub_path)); if (in_array($ext, array('php', 'asp', 'jsp', 'cgi', 'exe', 'dll'), TRUE)) { echo '异常文件：' . $sub_path . '
'; } } } } } // 一维数组转字符串 $sign待签名字符串 $url为urlencode转码GET参数字符串 function array_to_string($arr, &$sign = '', &$url = '') { if (count($arr) != count($arr, 1)) throw new Exception('Does not support multi-dimensional array to string'); // 注销签名 unset($arr['sign']); // 排序 ksort($arr); reset($arr); // 转字符串做签名 $url = ''; $sign = ''; foreach ($arr as $key => $val) { if (empty($val) || is_array($val)) continue; $url .= $key . '=' . urlencode($val) . '&'; $sign .= $key . '=' . $val . '&'; } $url = substr($url, 0, -1); $url = htmlspecialchars($url); $sign = substr($sign, 0, -1); } // 私钥生成签名 function rsa_create_sign($data, $key, $sign_type = 'RSA') { if (!function_exists('openssl_sign')) throw new Exception('OpenSSL extension is not enabled'); if (!defined('OPENSSL_ALGO_SHA256')) throw new Exception('Only versions above PHP 5.4.8 support SHA256'); $key = wordwrap($key, 64, "\n", true); if (FALSE === $key) throw new Exception('Private Key Error'); $key = "-----BEGIN RSA PRIVATE KEY-----\n$key\n-----END RSA PRIVATE KEY-----"; if ('RSA2' == $sign_type) { openssl_sign($data, $sign, $key, OPENSSL_ALGO_SHA256); } else { openssl_sign($data, $sign, $key, OPENSSL_ALGO_SHA1); } // 加密 return base64_encode($sign); } // 公钥验证签名 function rsa_verify_sign($data, $sign, $key, $sign_type = 'RSA') { $key = wordwrap($key, 64, "\n", true); if (FALSE === $key) throw new Exception('Public Key Error'); $key = "-----BEGIN PUBLIC KEY-----\n$key\n-----END PUBLIC KEY-----"; // 签名正确返回1 签名不正确返回0 错误-1 if ('RSA2' == $sign_type) { $result = openssl_verify($data, base64_decode($sign), $key, OPENSSL_ALGO_SHA256); } else { $result = openssl_verify($data, base64_decode($sign), $key, OPENSSL_ALGO_SHA1); } return $result === 1; } // Array to xml array('appid' => 'appid', 'code' => 'success') function array_to_xml($arr) { if (!is_array($arr) || empty($arr)) throw new Exception('Array Error'); $xml = ""; foreach ($arr as $key => $val) { if (is_numeric($val)) { $xml .= "<" . $key . ">" . $val . ""; } else { $xml .= "<" . $key . ">"; } } $xml .= ""; return $xml; } // Xml to array function xml_to_array($xml) { if (!$xml) throw new Exception('XML error'); $old = libxml_disable_entity_loader(true); // xml解析 $result = (array)simplexml_load_string($xml, null, LIBXML_NOCDATA | LIBXML_COMPACT); // 恢复旧值 if (FALSE === $old) libxml_disable_entity_loader(false); return $result; } // 逐行读取 function well_import($file) { if ($handle = fopen($file, 'r')) { while (!feof($handle)) { yield trim(fgets($handle)); } fclose($handle); } } // 计算总行数 function well_import_total($file, $key = 'well_import_total') { static $cache = array(); if (isset($cache[$key])) return $cache[$key]; $count = cache_get($key); if (NULL === $count) { $count = 0; $globs = well_import($file); while ($globs->valid()) { ++$count; $globs->next(); // 指向下一个 } $count and cache_set($key, $count, 300); } return $cache[$key] = $count; } $g_dir_file = FALSE; function well_search_dir($path) { global $g_dir_file; FALSE === $g_dir_file and $g_dir_file = array(); if (is_dir($path)) { $paths = scandir($path); foreach ($paths as $val) { $sub_path = $path . '/' . $val; if ('.' == $val || '..' == $val) { continue; } else if (is_dir($sub_path)) { well_search_dir($sub_path); } else { $g_dir_file[] = $sub_path; } } } return $g_dir_file; } ?>javascript - How to get multiple slider on one page? - Stack Overflow

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    Im trying to get a working onepage site with multiple sliders. But after more than 2 slider its not working anymore. How to fix it?

    I've got the code from w3schools for multiple sliders (trying to build up a website with w3.css framework). .asp

    I tried to copy from 2 to 6 sliders and changed the "var slideId = ["mySlides1", "mySlides2"] " to my 6 defined. But its not working.

    <!DOCTYPE html>
<html lang="de">
    <head>
        <title>Multiple Slider</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link href="css/w3.css" rel="stylesheet">
        <link href="css/style.css" rel="stylesheet">
        <script src=".1.1/jquery.min.js"></script>
        <script src="js/side-menu.js"></script>
    </head>

    <body>

<div class="w3-content w3-display-container">
  <img class="mySlides1" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides1" src="img_lights.jpg" style="width:100%">
  <img class="mySlides1" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides1" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides2" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides2" src="img_lights.jpg" style="width:100%">
  <img class="mySlides2" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides2" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides3" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides3" src="img_lights.jpg" style="width:100%">
  <img class="mySlides3" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides3" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides4" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides4" src="img_lights.jpg" style="width:100%">
  <img class="mySlides4" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides4" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides5" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides5" src="img_lights.jpg" style="width:100%">
  <img class="mySlides5" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides5" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides6" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides6" src="img_lights.jpg" style="width:100%">
  <img class="mySlides6" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides6" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<script>
var slideIndex = [1,1];
var slideId = ["mySlides1","mySlides2","mySlides3","mySlides4","mySlides5","mySlides6"]
showDivs(1, 0);
showDivs(1, 1);

function plusDivs(n, no) {
  showDivs(slideIndex[no] += n, no);
}

function showDivs(n, no) {
  var i;
  var x = document.getElementsByClassName(slideId[no]);
  if (n > x.length) {slideIndex[no] = 1}
  if (n < 1) {slideIndex[no] = x.length}
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";  
  }
  x[slideIndex[no]-1].style.display = "block";  
}
</script>

</body>
</html>

    I expect a working output and be confused why its not working.

    Im trying to get a working onepage site with multiple sliders. But after more than 2 slider its not working anymore. How to fix it?

    I've got the code from w3schools for multiple sliders (trying to build up a website with w3.css framework). https://www.w3schools./howto/howto_js_slideshow.asp

    I tried to copy from 2 to 6 sliders and changed the "var slideId = ["mySlides1", "mySlides2"] " to my 6 defined. But its not working.

    <!DOCTYPE html>
<html lang="de">
    <head>
        <title>Multiple Slider</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link href="css/w3.css" rel="stylesheet">
        <link href="css/style.css" rel="stylesheet">
        <script src="https://ajax.googleapis./ajax/libs/jquery/2.1.1/jquery.min.js"></script>
        <script src="js/side-menu.js"></script>
    </head>

    <body>

<div class="w3-content w3-display-container">
  <img class="mySlides1" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides1" src="img_lights.jpg" style="width:100%">
  <img class="mySlides1" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides1" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides2" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides2" src="img_lights.jpg" style="width:100%">
  <img class="mySlides2" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides2" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides3" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides3" src="img_lights.jpg" style="width:100%">
  <img class="mySlides3" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides3" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides4" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides4" src="img_lights.jpg" style="width:100%">
  <img class="mySlides4" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides4" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides5" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides5" src="img_lights.jpg" style="width:100%">
  <img class="mySlides5" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides5" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<div class="w3-content w3-display-container">
  <img class="mySlides6" src="img_snowtops.jpg" style="width:100%">
  <img class="mySlides6" src="img_lights.jpg" style="width:100%">
  <img class="mySlides6" src="img_mountains.jpg" style="width:100%">
  <img class="mySlides6" src="img_forest.jpg" style="width:100%">
  <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
</div>

<script>
var slideIndex = [1,1];
var slideId = ["mySlides1","mySlides2","mySlides3","mySlides4","mySlides5","mySlides6"]
showDivs(1, 0);
showDivs(1, 1);

function plusDivs(n, no) {
  showDivs(slideIndex[no] += n, no);
}

function showDivs(n, no) {
  var i;
  var x = document.getElementsByClassName(slideId[no]);
  if (n > x.length) {slideIndex[no] = 1}
  if (n < 1) {slideIndex[no] = x.length}
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";  
  }
  x[slideIndex[no]-1].style.display = "block";  
}
</script>

</body>
</html>

    I expect a working output and be confused why its not working.

    • javascript
    • html
    • css
    Share Improve this question asked Jan 8, 2019 at 5:38 FyndorFyndor 491 gold badge1 silver badge8 bronze badges 3
    • 1 maybe your ask is duplicate. Check here - stackoverflow./questions/9658840/… – Ahil Rahesh Commented Jan 8, 2019 at 5:42
    • Try to use different class for each slider for example: w3-display-container-1 w3-display-container-2 w3-display-containe-3 – Cuong Hoang Commented Jan 8, 2019 at 6:20
    • @CuongHoang but what of extra declaration i need then for css? – Fyndor Commented Jan 8, 2019 at 13:34
    Add a ment  | 

    2 Answers 2

    Reset to default 3

    Your are passing wrong index in every slider, 

    plusDivs(-1, 0) //this is for first

    you are doing same for all other sliders, instead you should do this.

    plusDivs(-1, 0) //first

plusDivs(-1, 1) //second

plusDivs(-1, 2) //third

    This way you will have your slider working.

    var slideIndex = [1, 1];
var slideId = ["mySlides1", "mySlides2"]
showDivs(1, 0);
showDivs(1, 1);

function plusDivs(n, no) {
  showDivs(slideIndex[no] += n, no);
}

function showDivs(n, no) {
  var i;
  var x = document.getElementsByClassName(slideId[no]);
  if (n > x.length) {
    slideIndex[no] = 1
  }
  if (n < 1) {
    slideIndex[no] = x.length
  }
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";
  }
  x[slideIndex[no] - 1].style.display = "block";
}
    <!DOCTYPE html>
<html lang="de">

<head>
  <title>Multiple Slider</title>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="css/w3.css" rel="stylesheet">
  <link href="css/style.css" rel="stylesheet">
  <script src="https://ajax.googleapis./ajax/libs/jquery/2.1.1/jquery.min.js"></script>
  <script src="js/side-menu.js"></script>
</head>

<body>

  <div class="w3-content w3-display-container">
    <img class="mySlides1" src="https://assets.pernod-ricard./nz/media_images/test.jpg?hUV74FvXQrWUBk1P2.fBvzoBUmjZ1wct" style="width:100%">
    <img class="mySlides1" src="https://images.sftcdn/images/t_app-logo-l,f_auto,dpr_auto/p/ce2ece60-9b32-11e6-95ab-00163ed833e7/2183169552/the-test-fun-for-friends-logo.png" style="width:100%">
    <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 0)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 0)">&#10095;</button>
  
  </div>

  <div class="w3-content w3-display-container">
    <img class="mySlides2" src="https://assets.pernod-ricard./nz/media_images/test.jpg?hUV74FvXQrWUBk1P2.fBvzoBUmjZ1wct" style="width:100%">
    <img class="mySlides2" src="https://images.sftcdn/images/t_app-logo-l,f_auto,dpr_auto/p/ce2ece60-9b32-11e6-95ab-00163ed833e7/2183169552/the-test-fun-for-friends-logo.png" style="width:100%">
    <button class="w3-button w3-black w3-display-left" onclick="plusDivs(-1, 1)">&#10094;</button>
  <button class="w3-button w3-black w3-display-right" onclick="plusDivs(1, 1)">&#10095;</button>
  
  </div>





</body>

</html>

    Multi slide html content

    <h2 style="text-align:center">Multiple Slideshows</h2>

<p>Slideshow 1:</p>
<div class="slideshow-container">
  <div class="mySlides1">
    <img src="q1.jpeg" style="width:100%">
  </div>

  <div class="mySlides1">
    <img src="q2.jpeg" style="width:100%">
  </div>

  <div class="mySlides1">
    <img src="q3.jpeg" style="width:100%">
  </div>

  <a class="prev" onclick="plusSlides(-1, 0)">&#10094;</a>
  <a class="next" onclick="plusSlides(1, 0)">&#10095;</a>
</div>

<p>Slideshow 2:</p>
<div class="slideshow-container">
  <div class="mySlides2">
    <img src="q3.jpeg" style="width:100%">
  </div>

  <div class="mySlides2">
    <img src="q2.jpeg" style="width:100%">
  </div>

  <div class="mySlides2">
    <img src="q1.jpeg" style="width:100%">
  </div>

  <a class="prev" onclick="plusSlides(-1, 1)">&#10094;</a>
  <a class="next" onclick="plusSlides(1, 1)">&#10095;</a>
</div>


<p>Slideshow 3:</p>
<div class="slideshow-container">
  <div class="mySlides3">
    <img src="q2.jpeg" style="width:100%">
  </div>

  <div class="mySlides3">
    <img src="q1.jpeg" style="width:100%">
  </div>

  <div class="mySlides3">
    <img src="q3.jpeg" style="width:100%">
  </div>

  <a class="prev" onclick="plusSlides(-1, 2)">&#10094;</a>
  <a class="next" onclick="plusSlides(1, 2)">&#10095;</a>
</div>


<p>Slideshow 4:</p>
<div class="slideshow-container">
  <div class="mySlides4">
    <img src="q1.jpeg" style="width:100%">
  </div>

  <div class="mySlides4">
    <img src="q2.jpeg" style="width:100%">
  </div>



  <a class="prev" onclick="plusSlides(-1, 3)">&#10094;</a>
  <a class="next" onclick="plusSlides(1, 3)">&#10095;</a>
</div>

    Script changes respect to multi slide index

    <script>
var slideIndex = [1,1,1,1,1]; //.. multi slide index count

var slideId = ["mySlides1", "mySlides2","mySlides3","mySlides4","mySlides5"] // .. multi slide class  name in array


//initalization 
showSlides(1, 0);  // zero  index
showSlides(1, 1);  // first  
showSlides(1, 2);  // second  
showSlides(1, 3);  // third 
showSlides(1, 4);   //four 
//....

//handling  previous slide  
function plusSlides(n, no) {
  showSlides(slideIndex[no] += n, no);
}


</script>

    Try this code.

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