remove last character after concatenating string output by for loop?

Question

$holder = \'\';

foreach($fields as $key){
    $holder .= $key.\', \';
}

echo $holder;

I have the code above, it outputs \"a, b, c, \" I want to r

Answer 1

You can use implode() to join all array elements together :

<?php
   $holder = implode(', ', $fields);
   echo $holder;
?>

Answer 2

You can use substr like this

$holder = '';

foreach($fields as $key){
    $holder .= $key.', ';
}
$newholder=substr($holder, 0, -1); 
echo $newholder;

Answer 3

That's not how it's done.

$holder = join(', ', $fields)