Increment Index in $_POST Array - php

Question

I have a section of php code where I need for the $_POST index to increment by one each time it goes through the "do while" loop. In other words, the first occurrence would be $_POST['tableserver1'], then the next one would be $_POST['tableserver2'], etc. This loops 6 times and then stops.
I have tried using variables as the index, trying to get them to increment. I found an example in the php manual http://php.net/manual/en/language.operators.increment.php which increments the number at the end of a string, but I'm not having any luck with getting it to work inside the $_POST index.
This section of code creates a set of 6 select lists that contain names from the database. I am trying to get the select lists to populate from the $_POST value if it is set, other wise it is zero.
Here is my code:
<?php
$x = 1;
do {
?>
<blockquote>
<p><?php echo $x . "."; ?>
<select name="tableserver<?php echo $x; ?>" id="tableserver<?php echo $x; ?>">
<option selected value="0" <?php
if (!(strcmp(0, '$tableserver.$x'))) {
echo "selected=\"selected\"";
}
?>>Select Server</option>
<?php
do {
if (strpos($row_getnamesRS['service'], '22') !== false) {
?>
<option value="<?php echo $row_getnamesRS['memberID'] ?>" <?php
if (!(strcmp($row_getnamesRS['memberID'], '$tableserver.$x'))) {
echo "selected=\"selected\"";
}
?>><?php
echo ucfirst(strtolower($row_getnamesRS['first_name']))
. " " . ucfirst(strtolower($row_getnamesRS['last_name']))
?></option>
<?php
}
} while ($row_getnamesRS = mysqli_fetch_assoc($getnamesRS));
$rows = mysqli_num_rows($getnamesRS);
if ($rows > 0) {
mysqli_data_seek($getnamesRS, 0);
$row_getnamesRS = mysqli_fetch_assoc($getnamesRS);
}
?>
</select>
</p>
</blockquote>
<?php
$x++;
} while ($x <= 6);
?>

Answer 1

$i=0;
do{
echo $_POST['someval'.$i];
}while(++$i < 6)

Answer 2

Perhaps like this? ...
$arr = [];
for ($i = 1; $i <= 6; $i++)
array_push($arr, $_POST["tableserver" . $i]);
$arr; // Contains 6 values (starting from $_POST["tableserver1"] to $_POST["tableserver6"])

Answer 3

It would be easier to post an an array
so instead of
name="tableserver<?php echo $x; ?>"
use
name="tableserver[]";
the you can just do
foreach($_POST['tableserver'] as $tableServer){....}