How to solve warning: mysqli::query(): couldn't fetch mysqli in and notice: trying to get property 'num_rows' of non-object error in mysql

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I have developed following code to show database fetched items when user clicked a button. For one button following code work perfect. So I used the same code for the second button to show query result after changing the variables. But when the second button is clicked it shows this error message

Warning: mysqli::query(): Couldn't fetch mysqli
Notice: Trying to get property 'num_rows' of non-object in
0 results
Warning: mysqli::close(): Couldn't fetch mysqli in

It is true that similar problem have occurred and answers have published to them. I tried those and still I can't understand where my mistake is.
A help to catch my mistake would be really admired
Thank you

What I have tried:

<?php
                      $sql = "SELECT * FROM services  where service='Vehicle_Hiring'
                      ";
                      $result = $con->query($sql);
                      if ($result->num_rows > 0) {
                      while ($row = $result->fetch_assoc()) {
                      ?>
          <div class="col-lg-3" style="border: outset;">
              <div class="header">
                      <?php echo '<img src="' . $row['image_path4']. '" width="100" height="100">'; ?>
              </div>
              <div class="body">
                      <h4><?php echo $row ['name']; ?></h4>
                      class="fa fa-envelope-square"><?php echo $row ['email']; ?></br>
                      class="fa fa-address-book"><?php echo $row ['address']; ?></br>
                      <?php echo $row ['years']; ?></br>
                      class="fa fa-info"><?php echo $row ['details']; ?>
              </div>
              <div style="background-color: #000000">
                      <font color="#FFFFFF"><?php echo $row ['district']; ?></font>
                      <font color="#FFFFFF"><?php echo $row ['city']; ?></font>
              </div>

          </div>

                      <?php
                         }
                      } else {
                         echo "0 results";
                      }
                      $con->close();
                      ?>

Posted 15-Aug-18 22:25pm

dush93

Updated 24-Sep-20 20:55pm

Add a Solution

3 solutions

Solution 3

it also works for me folks. thanks. there are too many days i am stuck in there.
we close the connection too early.

$db->close();

Posted 9-Apr-20 19:59pm

Member 14797800

Solution 4

Warning: mysqli_query(): Couldn't fetch mysqli in /home/u193961646/domains/myjss.online/public_html/test.php on line 12

Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, null given in /home/u193961646/domains/myjss.online/public_html/test.php on line 13

Notice: Undefined variable: ti in /home/u193961646/domains/myjss.online/public_html/test.php on line 17
Warning: mysqli_query(): Couldn't fetch mysqli in /home/u193961646/domains/myjss.online/public_html/test.php on line 20

Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, null given in /home/u193961646/domains/myjss.online/public_html/test.php on line 21

Notice: Undefined variable: jssblock in /home/u193961646/domains/myjss.online/public_html/test.php on line 25

include'newc.php';
// error_reporting(0);
error_reporting(E_ALL);
ini_set('display_errors', '1');

$runt=mysqli_query($conn,"SELECT * FROM `Recharge_offer` WHERE id=2");
while($rowt=mysqli_fetch_array($runt)){ $ti=$rowt['offer5'];
;}

echo"off=".$ti;

$run=mysqli_query($conn,"SELECT * FROM `onoff` WHERE id=7"); //ORDER BY id DESC LIMIT 0,50
while($row=mysqli_fetch_array($run)){
$jssblock=$row['paidjoinung']; $offerblock=$row['freejoining'];
}

echo"
on".$jssblock;

?>

Posted 24-Sep-20 20:55pm

Member 14948257

Comments

Richard Deeming 25-Sep-20 4:40am

Your question is not a solution to someone else's question.

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dush93 · Accepted Answer · 2018-08-15T22:33:00

Solution 1

The problem was in

$con->close();

I was closing the connection too early. when I removed that problem was solved

Posted 15-Aug-18 22:33pm

dush93