How to enter multiple data at once for students in php - php

Question

It is showing all the students in database and textbox with them. But when I enter marks of every student it picks only the first record and save only marks.
I want:
all name of student should print on page with text-box in which I will enter marks of each student.
I want to save the record of every student with their marks.
--
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';
$conn = mysql_connect($dbhost, $dbuser, $dbpass);
if(! $conn ) {
die('Could not connect: ' . mysql_error());
}
$sql = "SELECT * FROM stunr WHERE stucou = '".$_POST["cls"]."'";
mysql_select_db('college-db');
$retval = mysql_query( $sql, $conn );
if($retval === FALSE) {
die(mysql_error());
}
$row = mysql_fetch_array($retval);
echo "<div style='margin-top:120px; margin-left:180px;'>";
$cla=$row['stucou'];
echo "<h3>Class"."<b> $cla</b>"."</h3>";
echo"</div>";
echo "<div style='margin-top:50px; margin-left:180px;'>";
while($row = mysql_fetch_array($retval)) {
echo"<form method='post' action='mst-marks-insert.php'>";
$clsnm = $row['stufname'];
echo"$clsnm";
echo "<br>";
echo"<input type='text' name='mas' class='textbox' placeholder='Enter Marks'/><br><br>";
}
echo "<input type='text' name='tot' />";
echo"<input type='submit' />";
echo"</form>";
echo"</div>";

Answer 1

I would start with moving the beginning form tag before the while loop.
echo"<form method='post' action='mst-marks-insert.php'>";
while($row = mysql_fetch_array($retval))
{

Answer 2

Do something like this:
Move out the beginning form before while loop
Make field "mas" an array
This could look like this
<?php
mysql_select_db('college-db');
$retval = mysql_query($sql, $conn);
if ($retval === FALSE) {
die(mysql_error());
}
$row = mysql_fetch_array($retval);
echo "<div style='margin-top:120px; margin-left:180px;'>";
$cla = $row['stucou'];
echo "<h3>Class" . "<b> $cla</b>" . "</h3>";
echo"</div>";
echo "<div style='margin-top:50px; margin-left:180px;'>";
echo "<form method='post' action='mst-marks-insert.php'>";
while ($row = mysql_fetch_array($retval)) {
$clsnm = $row['stufname'];
echo "$clsnm";
echo "<br>";
echo "<input type='text' name='mas[$clsnm]' class='textbox' placeholder='Enter Marks'/><br><br>";
}
echo "<input type='text' name='tot' />";
echo "<input type='submit' />";
echo "</form>";
echo "</div>";
?>
In your "mst-marks-insert.php" the $_POST var then looks something like this:
<?php
var_dump($_POST['mas']);
array (
'clsnm1' => 'test',
'clsnm2' => 'test2',
)
?>
So you could do something like this (it's just an example what would be possible, because I don't know how your SQL table looks like):
<?php
foreach ($_POST['mas'] as $clsnm => $mas) {
mysql_query("INSERT INTO `mastable` (`clsnm`, `mas`) VALUES ('".mysql_real_escape_string($clsnm)."', '".mysql_real_escape_string($mas)."')");
}
?>