Using php to count rows in mysql database? -

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i trying count rows demos table got error
catchable fatal error: object of class mysqli_result not converted string in c:\xampp\htdocs\working_scripts\test_2.php on line 8
php code is:

<?php $con=mysqli_connect("localhost","root","","test"); if (mysqli_connect_errno()) { echo"error connecting database". mysqli_connect_error(); } $comment_counter=mysqli_query($con,"select count(*) total demos"); echo $comment_counter; ?>

you have use mysqli_fetch_array

<?php $con = mysqli_connect("localhost","root","","test");  if (mysqli_connect_errno()) {     echo"error connecting database". mysqli_connect_error(); }  $result = mysqli_query($con, "select count(*) total demos");  if($row = mysqli_fetch_array($result)) {     echo $row["total"]; } ?>

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