Remove last Comma from while loop - php

Question

My code is resulting in a output like this
Title1,1,Title2,2,
How can i remove the last comma from this?
$comma = ",";
$query = "SELECT name, listid FROM playlist ORDER BY id DESC";
$result = $mysqli->query($query);
while(list($name, $listid) = $result->fetch_row()) {
echo $name;
echo $comma;
echo $listid;
echo $comma;
}

Answer 1

$lines = array();
while(list($name, $listid) = $result->fetch_row()) {
$lines[] = "$name,$listid";
}
echo implode(',', $lines);

Answer 2

Don't manually echo commas. Just make an array, then implode it.
echo implode(',', array($name, $listid));

Answer 3

Use trim
<?php
$str = "1,2,3,4,5,";
echo trim($str, ",");
Output
1,2,3,4,5

Answer 4

You can try this:
$query = "SELECT name, listid FROM playlist ORDER BY id DESC";
$result = $mysqli->query($query);
$data = array();
while(list($name, $listid) = $result->fetch_row()) {
$data[] = $name.",".$listid;
}
echo implode(',', $data);

Answer 5

try this
$comma = ",";
$html = "";
$query = "SELECT name, listid FROM playlist ORDER BY id DESC";
$result = $mysqli->query($query);
while(list($name, $listid) = $result->fetch_row()) {
$html .= $name.$comma.$listid.$comma;
}
echo substr($html, 0, strlen($html) - 2);

Answer 6

I would recommend going with Joseph Silber's answer, although this would work :
$comma = ",";
$k=0;
$query = "SELECT name, listid FROM playlist ORDER BY id DESC";
$result = $mysqli->query($query);
while(list($name, $listid) = $result->fetch_row()) {
if($k!=0){
echo $comma;
}
echo $name;
echo $comma;
echo $listid;
$k++;
}

Answer 7

$result = mysqli_query($con,$query);
$num_rows= mysqli_num_rows($result);
$ctr=0;
while($row=mysqli_fetch_array($result)){
$ctr++;
echo $row['example'];
if($ctr!=$num_rows){
echo ',';}
else{
echo '';
}
}