PHP, SQL limit query by php variable

Question

PHP code defining variable sqlshowvalue

$sqlshowvalue = 5;
if(isset($_POST[\'showmore\'])) {
     $sqlshowvalue += 5;
}

So I connect to my

Answer 1

Have you tried making

$result = mysqli_query($conn,"SELECT * FROM comments ORDER BY id DESC limit '$sqlshowvalue'");

to

$result = mysqli_query($conn,"SELECT * FROM comments ORDER BY id DESC limit ".$sqlshowvalue);

Answer 2

Remove '' use only $sqlshowvalue:-

$result = mysqli_query($conn,"SELECT * FROM comments 
ORDER BY id DESC limit $sqlshowvalue");

for integer value no need of ''