html - How to fetch next row from database on each button click in PHP -


whenever click button, page got refreshed , lost previous values in variables. when use mt_rand function, fetched rows duplicated. next row on each button click?

fetch random row not necessary, @ least want next row in order.

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <?php  //database initialization $studname =""; $name=""; $task=""; $connection=mysqli_connect("localhost","apb","12345678","apb");  $number=1; if(isset( $_post["button1"])) {     $number = mt_rand(1,10);     $s="select * student_list num='$number'";     $r=  mysqli_query($connection,$s);     $row = mysqli_fetch_array($r);      $studname = $row["name"];     $name=""; }  if(isset($_post["submit5"])) {     $numb = mt_rand(1,4);      $s="select * computer rn='$numb'";     $r=  mysqli_query($connection,$s);     $row=mysqli_fetch_array($r);      $task = $row["task"];     $studname ="";     $name =""; } ?>  <html xmlns="http://www.w3.org/1999/xhtml">     <body>         <form id="form" action="" name="form1" method="post" >             <h1>mptc fresher's day celebration - 2017</h1>             <h5>this time lucky 1 ...</h5>              <p>                 <input type="hidden" name="process" value="1";>                 <input onclick="<?php $number=$number+1;?>" name="button1"   type="submit" id="button1" value="generate" />                 <br/>                 <input id="t1" name="textfield" type="text"  value="<?php echo $studname; ?>" />             </p>              <p>                 <h5>be ready !! </h5>                  <input type="submit" value="task" name="submit5" value="computer" />                 <br/>                 <input name="textfield3" type="text" value="<?php echo $task; ?>" />             </p>         </form>     </body> </html>

first of onclick="<?php $number=$number+1;?>" nothing. cannot use js event handler execute php code.

what can do, , you're close solution, this:

        <p>             <input type="hidden" name="process" value="<?php echo $number;?>";>             <input name="button1" type="submit" id="button1" value="generate" />             <br/>             <input id="t1" name="textfield" type="text"  value="<?php echo $studname; ?>" />         </p>

and change php part this:

$number= $_post['process']; if(isset( $_post["button1"])) {     $number = $number + 1; } $s="select * student_list num='$number'"; $r=  mysqli_query($connection,$s); $row = mysqli_fetch_array($r);  $studname = $row["name"]; $name="";

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