Cannot insert checkbox value into database - php

Question

Hello i'm a newbie in PHP language. So I hope u guys can be simple with me. I need to create like a attendance system for a meeting. Now I was stuck at one part. I need to add a staff from a department for every created meeting event. The staff name was already appear when I click from dropdown menu for every department that retrieve from database. Now I tried to select from the checkbox staff that I want to add with the meeting id. But nothing is happened when I click the submit button after checked the staff name. I want to add to a new table with the meeting id. display.php is code I create to appear the staffname and to check the checkbox and retrieve the record from user table . The checkbox.php is for insert the checked checkbox to a table meetingstaff. Please anyone help me..
Here I attached my PHP code
display.php
<label>Reference No:</label>
<label id="attach"><?php echo $_GET["refno"]; ?></label>
<form action="display.php?refno=<?php echo $_GET["refno"]; ?>" method="post">
<?php do { ?>
<form action="checkbox.php?refno=<?php echo $_GET["refno"]; ?>" method="post">
<tr >
<td><div align="center"><input name="chkl[]" type="checkbox" id="checkbox[]" value="<? echo $row_Recordset4['staffname']; ?>"></td>
<td><div align="center"><?php echo $row_Recordset4['staffname']; ?></div></td>
<td><div align="center"><?php echo $row_Recordset4['staffno']; ?></div></td>
</div></td>
</tr>
<?php } while ($row_Recordset4 = mysql_fetch_assoc($Recordset4));?>
checkbox.php
<label>Reference No:</label>
<label id="attach"><?php echo $_GET["refno"]; ?></label>
<?php
$checkbox1 = $_POST['chkl'];
if($_POST["Submit"]=="Submit")
{
for ($i=0; $i<sizeof($checkbox1);$i++) {
$query="INSERT INTO meetingstaff (staffname, staffno) VALUES ('".$checkbox1[$i]."')";
mysql_query($query) or die (mysql_error());
}
echo "Record is inserted";
}
?>

Answer 1

You need to INSERT a second parameter, or remove , staffno from the first part of the INSERT statement. You are passing just one value, but instructing for two columns.
So change your:
INSERT INTO meetingstaff (staffname, staffno) VALUES ('".$checkbox1[$i]."')
to either
INSERT INTO meetingstaff (staffname) VALUES ('".$checkbox1[$i]."')
or perhaps
INSERT INTO meetingstaff (staffname, staffno) VALUES ('".$checkbox1[$i]."', ".$i.")