PHP doesn't echo text for last row - php

Question

I'm trying to write a relatively simple twitter query in php with result like this:
from:TravisBenjamin3 OR from:AshleyElisaG OR from:tncvaan ...
This code works accept it doesn't echo the second OR, also I don't want to display an OR on the last row.
$counter = 0;
while($row = mysql_fetch_array($result)){
$counter++;
echo " from:";
echo $row['twitter'];
if ($counter < count($row)) {
echo " OR";
}
}
Some help would be greatly appreciated. Thanks,

Answer 1

<?php
$tweets = array();
while($row = mysql_fetch_array($result)) {
$tweets[] = $row['twitter'];
}
if(count($tweets) > 0) {
echo "from:" . implode(" OR from:", $tweets);
}
?>

Answer 2

$rowCount = mysql_num_rows($result);
while($row = mysql_fetch_array($result)){
$counter++;
echo " from:";
echo $row['twitter'];
if ($counter < $rowCount) {
echo " OR";
}
}

Answer 3

$count = mysql_num_rows($result);
for($r = 0; $r < $count; $r++)
{
$row = mysql_fetch_array($result));
echo " from:";
echo $row['twitter'];
if ($r < ($count - 1))
{
echo " OR";
}
}
Or, even easier:
$search = "";
while($row = mysql_fetch_array($result))
{
$search .= " from:" . $row['twitter'] . " OR";
}
// Cut the last " OR"
$search = substr($search, 0, strlen($search) - 3);
echo $search;
Which is actually a poor man's implementation for implode() suggested by Aaron W..