When slide show web page is reopen, the web page loading is very slow












0












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Here is a script that opens about 200 pictures, the first time you open the webpage, loading of the 200 pictures is fast, However if you reopen the page, it takes about 4 minutes to load the same page the second time. Please advice.



    session_start();
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', FALSE);
header('Pragma: no-cache');


if(!isset($_SESSION['token']) && (!isset($_SESSION['user']))){
echo "<script language='javascript'>self.close();</script>";
}
require 'db.php';
$upload_id = $_GET['id'];
$client = $_GET['NAME'];
?>
<!DOCTYPE html>
<html>
<head>
<title>Display | <?=$client;?></title>

<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="css/w4.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.2.1.min.js"></script>
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
</head>
<body>
<?
$myid = $_GET['myd'];
$mydept = $_GET['dept'];
$myrole = $_GET['role'];
?>

<?
//}
// Retrieving Book mark page for this job (upload_id)
$book = ("SELECT * FROM bookmark WHERE user_id = '".$_SESSION['id']."' AND upload_id='".$upload_id."' ");
$bk = mysqli_query($conn, $book) or die ("ERROR bookmark ".mysqli_error($conn));
$bookmark = mysqli_fetch_assoc($bk);
$page = $bookmark['page_book'];


?>
<div class="w3-container">
<center>
</div>
<div class="w3-content w3-display-container">
<?
$s = ("SELECT count(USER_ID) as counter FROM upload_data WHERE UPLOAD_ID='".$upload_id."'");
$r = mysqli_query($conn, $s) or die ("ERROR ".mysqli_error($conn));
$c = mysqli_fetch_assoc($r);
$all = $c['counter'];


$sql = ("SELECT YEAR, FOLDER, USER_ID, FILE_NAME FROM upload_data WHERE UPLOAD_ID='".$upload_id."' ORDER BY USER_ID");
$result = mysqli_query($conn, $sql) or die ("ERROR ".mysqli_error($conn));
while($row = mysqli_fetch_assoc($result)){
$file = $row['FILE_NAME'];
//$all = $row['pages'];
$year = $row['YEAR'];
$folder = $row['FOLDER'];
$id = $row['USER_ID'];
$fileshow = "/unix/upload/$year/$folder/$file";
?>

<div class="w3-display-container myPictures " style="left: -15%; ">
<img src=<? echo $fileshow;?> style="width:130%; height: auto;" data-zoom-image=<? echo $fileshow;?>>
<!--<div class="w3-display-bottomleft w3-large w3-container w3-padding-16 w3-black">
<?echo $id; ?>
</div>-->
</div>
<?
}
?>

<button class="button5" style="position: fixed; width: 100%; left: 20px; top: 140px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;" onclick="bookSave(0)">Save</button>&nbsp;
<div id="display" style="position: fixed; width: 100%; left: 30px; top: 372px;" ></div>&nbsp;
<button class="button2" style="position: fixed; width: 100%; left: 20px; top: 505px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;;" onclick="plusDivs(-10)">❮❮10-</button>&nbsp;
<font><div id="bookmark" style="position: fixed; width: 100%; left: 20px; top: 190px; height: 60px; width: 100px;"></div></font></center>

<div id="w20" class="clock" style="position: fixed; top: 20px; left: 60%;"></div>

<div class="message" style="position: fixed; top: 20px; left: 50%;"></div>
<button class="button" style="position: fixed; width: 100%; left: 20px; top: 410px; height: 50px; width: 100px; border-radius: 2px;" onclick="plusDivs(-1)">❮ 前へ</button>
<button class="button" style="position: fixed; width: 100%; left: 20px; top: 300px; height: 50px; width: 100px; border-radius: 2px;" onclick="plusDivs(1)">次へ ❯</button>
<button class="button2" style="position: fixed; width: 100%; left: 20px; top: 215px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;" onclick="plusDivs(10)">+10❯❯</button>&nbsp;
</div>
<?$hour = $_GET['t'];?>
<!---------------------------------------- Next | Prev Functions ------------------------------------------------------->
<script>
var slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
showDivs(slideIndex += n);
}

function showDivs(n) {
var i;
var x = document.getElementsByClassName("myPictures");
if (n > x.length) {slideIndex = 1}
if (n < 1) {slideIndex = x.length}
for (i = 0; i < x.length; i++) {
x[i].style.display = "none";
}
x[slideIndex-1].style.display = "block";

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("display").innerHTML = this.responseText;
}
};
xhttp.open("POST", "timer5.php", true);
xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id;?>&total=<?=$all;?>&myid=<?=$myid;?>&dept=<?=$mydept;?>&role=<?=$myrole;?>");
<?if($_SESSION['id']==20000){?>
function clock1(){
var clock;

$(document).ready(function() {

clock = $('.clock').FlipClock({
clockFace: 'MinuteCounter'
});
});
}
var clock;

$(document).ready(function() {

clock = $('.clock').FlipClock(<?=$hour;?>, {
clockFace: 'MinuteCounter',
countdown: true,
callbacks: {
stop: function() {
//$('.message').html('message here');
clock1();
}
}
});

});
<?}?>
}
</script>


<!-- ---------------------------------Save BookMark Functions ---------------------------------------->
<script>
function bookSave(n) {

if(confirm('Save and Close?')){
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("bookmark").innerHTML = this.responseText;
}
};
xhttp.open("POST", "booksave.php", true);
xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id;?>&myid=<?=$myid;?>");
setTimeout("self.close()", 2000 ) // after 5 seconds
}
}
</script>



<!------------------------------------------------------ Call BookMark (PageNumber) when view ------------------------------------------------------------>
<script>
var slideIndex = <?=$page;?>;
showBk(slideIndex);

function bookMark(n) {
showBk(slideIndex += n);
}
function showBk(n) {
var i;
var x = document.getElementsByClassName("myPictures");
if (n > x.length) {slideIndex = 1}
if (n < 1) {slideIndex = x.length}
for (i = 0; i < x.length; i++) {
x[i].style.display = "none";
}
x[slideIndex-1].style.display = "block";

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("display").innerHTML = this.responseText;
}
};
xhttp.open("POST", "callbookmark.php", true);
xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id; ?>");
}
</script>
</body>
</html


>










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A. Kiyoshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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    $begingroup$


    Here is a script that opens about 200 pictures, the first time you open the webpage, loading of the 200 pictures is fast, However if you reopen the page, it takes about 4 minutes to load the same page the second time. Please advice.



        session_start();
    header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
    header('Cache-Control: no-store, no-cache, must-revalidate');
    header('Cache-Control: post-check=0, pre-check=0', FALSE);
    header('Pragma: no-cache');


    if(!isset($_SESSION['token']) && (!isset($_SESSION['user']))){
    echo "<script language='javascript'>self.close();</script>";
    }
    require 'db.php';
    $upload_id = $_GET['id'];
    $client = $_GET['NAME'];
    ?>
    <!DOCTYPE html>
    <html>
    <head>
    <title>Display | <?=$client;?></title>

    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="css/w4.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.2.1.min.js"></script>
    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
    <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
    </head>
    <body>
    <?
    $myid = $_GET['myd'];
    $mydept = $_GET['dept'];
    $myrole = $_GET['role'];
    ?>

    <?
    //}
    // Retrieving Book mark page for this job (upload_id)
    $book = ("SELECT * FROM bookmark WHERE user_id = '".$_SESSION['id']."' AND upload_id='".$upload_id."' ");
    $bk = mysqli_query($conn, $book) or die ("ERROR bookmark ".mysqli_error($conn));
    $bookmark = mysqli_fetch_assoc($bk);
    $page = $bookmark['page_book'];


    ?>
    <div class="w3-container">
    <center>
    </div>
    <div class="w3-content w3-display-container">
    <?
    $s = ("SELECT count(USER_ID) as counter FROM upload_data WHERE UPLOAD_ID='".$upload_id."'");
    $r = mysqli_query($conn, $s) or die ("ERROR ".mysqli_error($conn));
    $c = mysqli_fetch_assoc($r);
    $all = $c['counter'];


    $sql = ("SELECT YEAR, FOLDER, USER_ID, FILE_NAME FROM upload_data WHERE UPLOAD_ID='".$upload_id."' ORDER BY USER_ID");
    $result = mysqli_query($conn, $sql) or die ("ERROR ".mysqli_error($conn));
    while($row = mysqli_fetch_assoc($result)){
    $file = $row['FILE_NAME'];
    //$all = $row['pages'];
    $year = $row['YEAR'];
    $folder = $row['FOLDER'];
    $id = $row['USER_ID'];
    $fileshow = "/unix/upload/$year/$folder/$file";
    ?>

    <div class="w3-display-container myPictures " style="left: -15%; ">
    <img src=<? echo $fileshow;?> style="width:130%; height: auto;" data-zoom-image=<? echo $fileshow;?>>
    <!--<div class="w3-display-bottomleft w3-large w3-container w3-padding-16 w3-black">
    <?echo $id; ?>
    </div>-->
    </div>
    <?
    }
    ?>

    <button class="button5" style="position: fixed; width: 100%; left: 20px; top: 140px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;" onclick="bookSave(0)">Save</button>&nbsp;
    <div id="display" style="position: fixed; width: 100%; left: 30px; top: 372px;" ></div>&nbsp;
    <button class="button2" style="position: fixed; width: 100%; left: 20px; top: 505px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;;" onclick="plusDivs(-10)">❮❮10-</button>&nbsp;
    <font><div id="bookmark" style="position: fixed; width: 100%; left: 20px; top: 190px; height: 60px; width: 100px;"></div></font></center>

    <div id="w20" class="clock" style="position: fixed; top: 20px; left: 60%;"></div>

    <div class="message" style="position: fixed; top: 20px; left: 50%;"></div>
    <button class="button" style="position: fixed; width: 100%; left: 20px; top: 410px; height: 50px; width: 100px; border-radius: 2px;" onclick="plusDivs(-1)">❮ 前へ</button>
    <button class="button" style="position: fixed; width: 100%; left: 20px; top: 300px; height: 50px; width: 100px; border-radius: 2px;" onclick="plusDivs(1)">次へ ❯</button>
    <button class="button2" style="position: fixed; width: 100%; left: 20px; top: 215px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;" onclick="plusDivs(10)">+10❯❯</button>&nbsp;
    </div>
    <?$hour = $_GET['t'];?>
    <!---------------------------------------- Next | Prev Functions ------------------------------------------------------->
    <script>
    var slideIndex = 1;
    showDivs(slideIndex);

    function plusDivs(n) {
    showDivs(slideIndex += n);
    }

    function showDivs(n) {
    var i;
    var x = document.getElementsByClassName("myPictures");
    if (n > x.length) {slideIndex = 1}
    if (n < 1) {slideIndex = x.length}
    for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";
    }
    x[slideIndex-1].style.display = "block";

    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
    document.getElementById("display").innerHTML = this.responseText;
    }
    };
    xhttp.open("POST", "timer5.php", true);
    xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id;?>&total=<?=$all;?>&myid=<?=$myid;?>&dept=<?=$mydept;?>&role=<?=$myrole;?>");
    <?if($_SESSION['id']==20000){?>
    function clock1(){
    var clock;

    $(document).ready(function() {

    clock = $('.clock').FlipClock({
    clockFace: 'MinuteCounter'
    });
    });
    }
    var clock;

    $(document).ready(function() {

    clock = $('.clock').FlipClock(<?=$hour;?>, {
    clockFace: 'MinuteCounter',
    countdown: true,
    callbacks: {
    stop: function() {
    //$('.message').html('message here');
    clock1();
    }
    }
    });

    });
    <?}?>
    }
    </script>


    <!-- ---------------------------------Save BookMark Functions ---------------------------------------->
    <script>
    function bookSave(n) {

    if(confirm('Save and Close?')){
    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
    document.getElementById("bookmark").innerHTML = this.responseText;
    }
    };
    xhttp.open("POST", "booksave.php", true);
    xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id;?>&myid=<?=$myid;?>");
    setTimeout("self.close()", 2000 ) // after 5 seconds
    }
    }
    </script>



    <!------------------------------------------------------ Call BookMark (PageNumber) when view ------------------------------------------------------------>
    <script>
    var slideIndex = <?=$page;?>;
    showBk(slideIndex);

    function bookMark(n) {
    showBk(slideIndex += n);
    }
    function showBk(n) {
    var i;
    var x = document.getElementsByClassName("myPictures");
    if (n > x.length) {slideIndex = 1}
    if (n < 1) {slideIndex = x.length}
    for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";
    }
    x[slideIndex-1].style.display = "block";

    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
    document.getElementById("display").innerHTML = this.responseText;
    }
    };
    xhttp.open("POST", "callbookmark.php", true);
    xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id; ?>");
    }
    </script>
    </body>
    </html


    >










    share|improve this question







    New contributor




    A. Kiyoshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







    $endgroup$















      0












      0








      0





      $begingroup$


      Here is a script that opens about 200 pictures, the first time you open the webpage, loading of the 200 pictures is fast, However if you reopen the page, it takes about 4 minutes to load the same page the second time. Please advice.



          session_start();
      header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
      header('Cache-Control: no-store, no-cache, must-revalidate');
      header('Cache-Control: post-check=0, pre-check=0', FALSE);
      header('Pragma: no-cache');


      if(!isset($_SESSION['token']) && (!isset($_SESSION['user']))){
      echo "<script language='javascript'>self.close();</script>";
      }
      require 'db.php';
      $upload_id = $_GET['id'];
      $client = $_GET['NAME'];
      ?>
      <!DOCTYPE html>
      <html>
      <head>
      <title>Display | <?=$client;?></title>

      <meta name="viewport" content="width=device-width, initial-scale=1">
      <link rel="stylesheet" href="css/w4.css">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
      <script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.2.1.min.js"></script>
      <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
      <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
      <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
      </head>
      <body>
      <?
      $myid = $_GET['myd'];
      $mydept = $_GET['dept'];
      $myrole = $_GET['role'];
      ?>

      <?
      //}
      // Retrieving Book mark page for this job (upload_id)
      $book = ("SELECT * FROM bookmark WHERE user_id = '".$_SESSION['id']."' AND upload_id='".$upload_id."' ");
      $bk = mysqli_query($conn, $book) or die ("ERROR bookmark ".mysqli_error($conn));
      $bookmark = mysqli_fetch_assoc($bk);
      $page = $bookmark['page_book'];


      ?>
      <div class="w3-container">
      <center>
      </div>
      <div class="w3-content w3-display-container">
      <?
      $s = ("SELECT count(USER_ID) as counter FROM upload_data WHERE UPLOAD_ID='".$upload_id."'");
      $r = mysqli_query($conn, $s) or die ("ERROR ".mysqli_error($conn));
      $c = mysqli_fetch_assoc($r);
      $all = $c['counter'];


      $sql = ("SELECT YEAR, FOLDER, USER_ID, FILE_NAME FROM upload_data WHERE UPLOAD_ID='".$upload_id."' ORDER BY USER_ID");
      $result = mysqli_query($conn, $sql) or die ("ERROR ".mysqli_error($conn));
      while($row = mysqli_fetch_assoc($result)){
      $file = $row['FILE_NAME'];
      //$all = $row['pages'];
      $year = $row['YEAR'];
      $folder = $row['FOLDER'];
      $id = $row['USER_ID'];
      $fileshow = "/unix/upload/$year/$folder/$file";
      ?>

      <div class="w3-display-container myPictures " style="left: -15%; ">
      <img src=<? echo $fileshow;?> style="width:130%; height: auto;" data-zoom-image=<? echo $fileshow;?>>
      <!--<div class="w3-display-bottomleft w3-large w3-container w3-padding-16 w3-black">
      <?echo $id; ?>
      </div>-->
      </div>
      <?
      }
      ?>

      <button class="button5" style="position: fixed; width: 100%; left: 20px; top: 140px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;" onclick="bookSave(0)">Save</button>&nbsp;
      <div id="display" style="position: fixed; width: 100%; left: 30px; top: 372px;" ></div>&nbsp;
      <button class="button2" style="position: fixed; width: 100%; left: 20px; top: 505px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;;" onclick="plusDivs(-10)">❮❮10-</button>&nbsp;
      <font><div id="bookmark" style="position: fixed; width: 100%; left: 20px; top: 190px; height: 60px; width: 100px;"></div></font></center>

      <div id="w20" class="clock" style="position: fixed; top: 20px; left: 60%;"></div>

      <div class="message" style="position: fixed; top: 20px; left: 50%;"></div>
      <button class="button" style="position: fixed; width: 100%; left: 20px; top: 410px; height: 50px; width: 100px; border-radius: 2px;" onclick="plusDivs(-1)">❮ 前へ</button>
      <button class="button" style="position: fixed; width: 100%; left: 20px; top: 300px; height: 50px; width: 100px; border-radius: 2px;" onclick="plusDivs(1)">次へ ❯</button>
      <button class="button2" style="position: fixed; width: 100%; left: 20px; top: 215px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;" onclick="plusDivs(10)">+10❯❯</button>&nbsp;
      </div>
      <?$hour = $_GET['t'];?>
      <!---------------------------------------- Next | Prev Functions ------------------------------------------------------->
      <script>
      var slideIndex = 1;
      showDivs(slideIndex);

      function plusDivs(n) {
      showDivs(slideIndex += n);
      }

      function showDivs(n) {
      var i;
      var x = document.getElementsByClassName("myPictures");
      if (n > x.length) {slideIndex = 1}
      if (n < 1) {slideIndex = x.length}
      for (i = 0; i < x.length; i++) {
      x[i].style.display = "none";
      }
      x[slideIndex-1].style.display = "block";

      var xhttp = new XMLHttpRequest();
      xhttp.onreadystatechange = function() {
      if (this.readyState == 4 && this.status == 200) {
      document.getElementById("display").innerHTML = this.responseText;
      }
      };
      xhttp.open("POST", "timer5.php", true);
      xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id;?>&total=<?=$all;?>&myid=<?=$myid;?>&dept=<?=$mydept;?>&role=<?=$myrole;?>");
      <?if($_SESSION['id']==20000){?>
      function clock1(){
      var clock;

      $(document).ready(function() {

      clock = $('.clock').FlipClock({
      clockFace: 'MinuteCounter'
      });
      });
      }
      var clock;

      $(document).ready(function() {

      clock = $('.clock').FlipClock(<?=$hour;?>, {
      clockFace: 'MinuteCounter',
      countdown: true,
      callbacks: {
      stop: function() {
      //$('.message').html('message here');
      clock1();
      }
      }
      });

      });
      <?}?>
      }
      </script>


      <!-- ---------------------------------Save BookMark Functions ---------------------------------------->
      <script>
      function bookSave(n) {

      if(confirm('Save and Close?')){
      var xhttp = new XMLHttpRequest();
      xhttp.onreadystatechange = function() {
      if (this.readyState == 4 && this.status == 200) {
      document.getElementById("bookmark").innerHTML = this.responseText;
      }
      };
      xhttp.open("POST", "booksave.php", true);
      xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id;?>&myid=<?=$myid;?>");
      setTimeout("self.close()", 2000 ) // after 5 seconds
      }
      }
      </script>



      <!------------------------------------------------------ Call BookMark (PageNumber) when view ------------------------------------------------------------>
      <script>
      var slideIndex = <?=$page;?>;
      showBk(slideIndex);

      function bookMark(n) {
      showBk(slideIndex += n);
      }
      function showBk(n) {
      var i;
      var x = document.getElementsByClassName("myPictures");
      if (n > x.length) {slideIndex = 1}
      if (n < 1) {slideIndex = x.length}
      for (i = 0; i < x.length; i++) {
      x[i].style.display = "none";
      }
      x[slideIndex-1].style.display = "block";

      var xhttp = new XMLHttpRequest();
      xhttp.onreadystatechange = function() {
      if (this.readyState == 4 && this.status == 200) {
      document.getElementById("display").innerHTML = this.responseText;
      }
      };
      xhttp.open("POST", "callbookmark.php", true);
      xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id; ?>");
      }
      </script>
      </body>
      </html


      >










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      $endgroup$




      Here is a script that opens about 200 pictures, the first time you open the webpage, loading of the 200 pictures is fast, However if you reopen the page, it takes about 4 minutes to load the same page the second time. Please advice.



          session_start();
      header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
      header('Cache-Control: no-store, no-cache, must-revalidate');
      header('Cache-Control: post-check=0, pre-check=0', FALSE);
      header('Pragma: no-cache');


      if(!isset($_SESSION['token']) && (!isset($_SESSION['user']))){
      echo "<script language='javascript'>self.close();</script>";
      }
      require 'db.php';
      $upload_id = $_GET['id'];
      $client = $_GET['NAME'];
      ?>
      <!DOCTYPE html>
      <html>
      <head>
      <title>Display | <?=$client;?></title>

      <meta name="viewport" content="width=device-width, initial-scale=1">
      <link rel="stylesheet" href="css/w4.css">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
      <script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.2.1.min.js"></script>
      <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
      <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
      <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
      </head>
      <body>
      <?
      $myid = $_GET['myd'];
      $mydept = $_GET['dept'];
      $myrole = $_GET['role'];
      ?>

      <?
      //}
      // Retrieving Book mark page for this job (upload_id)
      $book = ("SELECT * FROM bookmark WHERE user_id = '".$_SESSION['id']."' AND upload_id='".$upload_id."' ");
      $bk = mysqli_query($conn, $book) or die ("ERROR bookmark ".mysqli_error($conn));
      $bookmark = mysqli_fetch_assoc($bk);
      $page = $bookmark['page_book'];


      ?>
      <div class="w3-container">
      <center>
      </div>
      <div class="w3-content w3-display-container">
      <?
      $s = ("SELECT count(USER_ID) as counter FROM upload_data WHERE UPLOAD_ID='".$upload_id."'");
      $r = mysqli_query($conn, $s) or die ("ERROR ".mysqli_error($conn));
      $c = mysqli_fetch_assoc($r);
      $all = $c['counter'];


      $sql = ("SELECT YEAR, FOLDER, USER_ID, FILE_NAME FROM upload_data WHERE UPLOAD_ID='".$upload_id."' ORDER BY USER_ID");
      $result = mysqli_query($conn, $sql) or die ("ERROR ".mysqli_error($conn));
      while($row = mysqli_fetch_assoc($result)){
      $file = $row['FILE_NAME'];
      //$all = $row['pages'];
      $year = $row['YEAR'];
      $folder = $row['FOLDER'];
      $id = $row['USER_ID'];
      $fileshow = "/unix/upload/$year/$folder/$file";
      ?>

      <div class="w3-display-container myPictures " style="left: -15%; ">
      <img src=<? echo $fileshow;?> style="width:130%; height: auto;" data-zoom-image=<? echo $fileshow;?>>
      <!--<div class="w3-display-bottomleft w3-large w3-container w3-padding-16 w3-black">
      <?echo $id; ?>
      </div>-->
      </div>
      <?
      }
      ?>

      <button class="button5" style="position: fixed; width: 100%; left: 20px; top: 140px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;" onclick="bookSave(0)">Save</button>&nbsp;
      <div id="display" style="position: fixed; width: 100%; left: 30px; top: 372px;" ></div>&nbsp;
      <button class="button2" style="position: fixed; width: 100%; left: 20px; top: 505px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;;" onclick="plusDivs(-10)">❮❮10-</button>&nbsp;
      <font><div id="bookmark" style="position: fixed; width: 100%; left: 20px; top: 190px; height: 60px; width: 100px;"></div></font></center>

      <div id="w20" class="clock" style="position: fixed; top: 20px; left: 60%;"></div>

      <div class="message" style="position: fixed; top: 20px; left: 50%;"></div>
      <button class="button" style="position: fixed; width: 100%; left: 20px; top: 410px; height: 50px; width: 100px; border-radius: 2px;" onclick="plusDivs(-1)">❮ 前へ</button>
      <button class="button" style="position: fixed; width: 100%; left: 20px; top: 300px; height: 50px; width: 100px; border-radius: 2px;" onclick="plusDivs(1)">次へ ❯</button>
      <button class="button2" style="position: fixed; width: 100%; left: 20px; top: 215px; height: 40px; width: 100px; border-radius: 2px; background-color: Transparent;" onclick="plusDivs(10)">+10❯❯</button>&nbsp;
      </div>
      <?$hour = $_GET['t'];?>
      <!---------------------------------------- Next | Prev Functions ------------------------------------------------------->
      <script>
      var slideIndex = 1;
      showDivs(slideIndex);

      function plusDivs(n) {
      showDivs(slideIndex += n);
      }

      function showDivs(n) {
      var i;
      var x = document.getElementsByClassName("myPictures");
      if (n > x.length) {slideIndex = 1}
      if (n < 1) {slideIndex = x.length}
      for (i = 0; i < x.length; i++) {
      x[i].style.display = "none";
      }
      x[slideIndex-1].style.display = "block";

      var xhttp = new XMLHttpRequest();
      xhttp.onreadystatechange = function() {
      if (this.readyState == 4 && this.status == 200) {
      document.getElementById("display").innerHTML = this.responseText;
      }
      };
      xhttp.open("POST", "timer5.php", true);
      xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id;?>&total=<?=$all;?>&myid=<?=$myid;?>&dept=<?=$mydept;?>&role=<?=$myrole;?>");
      <?if($_SESSION['id']==20000){?>
      function clock1(){
      var clock;

      $(document).ready(function() {

      clock = $('.clock').FlipClock({
      clockFace: 'MinuteCounter'
      });
      });
      }
      var clock;

      $(document).ready(function() {

      clock = $('.clock').FlipClock(<?=$hour;?>, {
      clockFace: 'MinuteCounter',
      countdown: true,
      callbacks: {
      stop: function() {
      //$('.message').html('message here');
      clock1();
      }
      }
      });

      });
      <?}?>
      }
      </script>


      <!-- ---------------------------------Save BookMark Functions ---------------------------------------->
      <script>
      function bookSave(n) {

      if(confirm('Save and Close?')){
      var xhttp = new XMLHttpRequest();
      xhttp.onreadystatechange = function() {
      if (this.readyState == 4 && this.status == 200) {
      document.getElementById("bookmark").innerHTML = this.responseText;
      }
      };
      xhttp.open("POST", "booksave.php", true);
      xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id;?>&myid=<?=$myid;?>");
      setTimeout("self.close()", 2000 ) // after 5 seconds
      }
      }
      </script>



      <!------------------------------------------------------ Call BookMark (PageNumber) when view ------------------------------------------------------------>
      <script>
      var slideIndex = <?=$page;?>;
      showBk(slideIndex);

      function bookMark(n) {
      showBk(slideIndex += n);
      }
      function showBk(n) {
      var i;
      var x = document.getElementsByClassName("myPictures");
      if (n > x.length) {slideIndex = 1}
      if (n < 1) {slideIndex = x.length}
      for (i = 0; i < x.length; i++) {
      x[i].style.display = "none";
      }
      x[slideIndex-1].style.display = "block";

      var xhttp = new XMLHttpRequest();
      xhttp.onreadystatechange = function() {
      if (this.readyState == 4 && this.status == 200) {
      document.getElementById("display").innerHTML = this.responseText;
      }
      };
      xhttp.open("POST", "callbookmark.php", true);
      xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      xhttp.send("index="+slideIndex+"&name=<?echo $client;?>&upload_id=<?echo $upload_id; ?>");
      }
      </script>
      </body>
      </html


      >







      javascript php cache






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      asked 22 mins ago









      A. KiyoshiA. Kiyoshi

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