php - $_POST on a While loop? -

my question is: can post using form , inside while loop? have supposed give me check box , titles of songs next it, want able select few check boxes , post them "process.php" code made not posting process.php. if click submit button without checking boxes defaults last result # in database, if check or few boxes says "undifined off-set # 9" last result in database. if make form inside while loop ton of submit buttons per result. not sure im doing wrong! please me!!!

this need happen ⎕ song name ⎕ song name 2 submit

if click submit on process.php should able use "song_name"

please select songs: <br>               <form method="post" action="process.php">             <?php              $servername = "localhost";             $username = "root";             $password = "";             $dbname = "song_selection";              // create connection             $conn = new mysqli($servername, $username, $password, $dbname);             // check connection             if ($conn->connect_error) {             die("connection failed: " . $conn->connect_error);             }               $sql = "select * songs";             $result = $conn->query($sql);              if ($result->num_rows > 0) {             $a = 1;              // output data of each row             while($row = $result->fetch_assoc()) {             $song_name = $a++;             //echo "title: " . $row["title"]. "<br>";             ?>             <div width="200">               <label>             <input type="checkbox" name="<?php echo $song_name; ?>" value="<?php echo $song_name; ?>" id="checkboxgroup1_0" />             <?php echo $row['title']; ?></label>                </div>             <?php             } echo '<input type="submit" value="thanks">';             } else {             echo "0 results";             }              ?>              </form>              <?php              echo $_post[$song_name];             ?> 

the $song_name counter value, not actual song name, , used in value="" attribute. believe $row['title'] actual song name, replace,

<input type="checkbox" name="<?php echo $song_name; ?>" value="<?php echo $song_name; ?>" id="checkboxgroup1_0" /> 

with

<input type="checkbox" name="<?php echo $song_name; ?>" value="<?php echo $row['title']; ?>" id="checkboxgroup1_0" /> 

and question:

if click submit on process.php should able use "song_name"

if requirement process form this:

process.php

foreach($_post $key => $value){     echo $key . ": " . $value . "<br />"; }