Get specific data after output everything from database - php

Question

I've got here a table with all the data from my database. On the end on every row, I have put a checkbox with the value 1, to update the 'accept' status in my database, which is default by 0.
My problem is, that the value of a ticked checkbox should update the 'accept' status ONLY in the entry in its row after the submit button got pressed.
So basically I need to check if the checkbox is ticked, and if its ticked, the 'accept' status in the row of the checkbox gets the value of 1. For that, I think I need to get the 'match_id' of the row.
This is how it looks on the website:
This is the table:
mysql_connect("localhost", "root", "") or die(mysql_error());
mysql_select_db('lr') or die(mysql_error());
$result = mysql_query("SELECT * FROM `challenge`") or die(mysql_error());
echo "<table class='match-table'>";
echo "<thead><tr> <th><h1>match_id</h1></th> <th><h1>Team</h1></th><th><h1>Accept Status</h1></th><th><h1>Accept</h1></th> </tr></thead><tbody>";
while($row = mysql_fetch_array($result)){
echo "<tr><td>";
echo $row['match_id'];
echo "</td><td>";
echo $row['team'];
echo "</td><td>";
echo $row['accept'];
echo "</td><td>";
?>
<form action="" method="post">
<input type="checkbox" name="challenge_accept" value="1"/>
<?php
echo "</td></tr>";
}
echo "</tbody></table>";
?>
<input type="submit" value="Save"/>
<input type="reset" value="Delete"/>
</form>
Any suggestions how I can do that?

Answer 1

Your HTML is utterly invalid, with MULTIPLE <form> being opened and only one </form> at the end of the page. You're also splitting your tags into garbage like
<tr><td><form></td></tr>
[many repeats]
</table>
</form>
Your form fields also don't include ANY method of identifying which row was actually clicked on, e.g. <input type="submit" name="selected_row" value="<?php echo $row['id'] ?>" />. As it stands right now, you've hardcoded the value 1, so no matter which of however many buttons you spit out, they'll ALL be sending 1 back to your code.