how to insert value of radio button for each row from php into mysqli database
Question
<?php
include( 'connect.php');
$query = mysqli_query($conn, "select * from users") or die( "unable to connect"); ?>
<html>
<head>
</head>
<body>
<h2 align="center"> student list</h2>
<form action="radio.php" method="post">
<table align="center" border="1" cellspacing="0" cellpadding="0" width="700">
<thead>
<td align='center'>id</td>
<td align='center'>enrolloment_no</td>
<td align='center'>first_name</td>
<td align='center'>last_name</td>
<td align='center'>attendance </td>
</thead>
<?php
$i=1;
while ( $row = mysqli_fetch_array($query, MYSQLI_BOTH) ) {
echo "<tr>
<td align='center'>" . @$i . "</td>
<td align='center'>" . @$row[ 'enrolloment_no' ] . "</td>
<td align='center'>" . @$row[ 'first_name'] . "</td>
<td align='center'>" . @$row[ 'last_name'] . "</td>
<td align='center'>
<input type=\"hidden\" value=\" " . $row['enrolloment_no'] . "\" name=\"rowIDs[]\" />
<input type=\"radio\" name=\"a_ " . $row['enrolloment_no'] . "\" value=\"present\">present
<input type=\"radio\" name=\"a_ " . $row['enrolloment_no'] . "\" value=\"absent\">absent
</td>
</tr>";
$i++;
}
?>
</table>
<input type="submit" value="submit">
</form>
</body>
</html>
The above is the code of the attendance page and now I want to submit the the student's attendance ie for each student into database along with its enrolloment number so if any body could help me with it.
I have also tried something to sumbit and it looks like below mentioned...
<?php
$rowIDs = $_POST['rowIDs'];
foreach( $rowIDs as $rowID ) {
$radioButtonValue = $_POST['a_' . $rowID ];
$b = mysqli_query(@$conn, "update `adding` SET `masterAttendance` = '" . $radioButtonValue .
"' WHERE `enrolloment_no` = '" . $rowID.
"'");
}
?>
**
Error : Warning: mysqli_query() expects parameter 1 to be mysqli, null given in C:\\wamp64\\www\\demo\\radio.php on line 7
**
1 answers
solution1
0 2016-11-16 09:40:58
<form method="post" action="yourPageName.php"/>
<?php $i=1;
echo '<table>';
while($row=mysqli_fetch_array($query,MYSQLI_BOTH)){
echo '<tr>
<td align="center">'.$i.'</td>
<td align="center">'.@$row['enrolloment_no'].'</td>
<td align="center">'.@$row['first_name'].'</td>
<td align="center">'.@$row['first_name'].'</td>
<td align="center">
<input type="hidden" value="'.$row['enrolloment_no'].'" name="enrolloment_no_'.$i.'"/>
<input type="radio" name="a_'.$row['enrolloment_no'].'" value="present" />present
<input type="radio" name="a_'.$row['enrolloment_no'].'" value="absent" />absent
<input type="hidden" value="'.$i.'" name="rowCount" id="rowCount"/>
</td>
</tr>';
$i++;
}
echo '</table>
<input type="submit" value="submit">';
?>
</form>
this may be your form and the form submission is below.
<?php
if(isset($_POST) && $_POST!="" && !empty($_POST)){ // checking if form submision is occured or not.
if( isset($_POST['rowCount']) && !empty($_POST['rowCount']) && $_POST['rowCount']!="" )
{ $rowCount=$_POST['rowCount']; }
else{ $rowCount="";}
for($i=1;$i<=$rowCount;$i++){
if( isset($_POST['enrolloment_no_'.$i]) && !empty($_POST['enrolloment_no_'.$i]) && $_POST['enrolloment_no_'.$i]!="" )
{ $enrolloment_no=$_POST['enrolloment_no_'.$i]; }
else{ $enrolloment_no="";}
if( isset($_POST['a_'.$enrolloment_no]) && !empty($_POST['a_'.$enrolloment_no]) && $_POST['a_'.$enrolloment_no]!="" )
{ $absentPresnt=$_POST['a_'.$enrolloment_no]; }
else{ $absentPresnt="absent";}
//$b = mysqli_query($conn, "update `adding` SET `masterAttendance` = '" . $absentPresnt . "' WHERE `enrolloment_no` = '" . $enrolloment_no. "'");
$knownStmt=mysqli_prepare($conn, "update `adding` SET `masterAttendance` =? WHERE `enrolloment_no` = ? ;");
if( $knownStmt ) {
mysqli_stmt_bind_param($knownStmt,"dd",$absentPresnt,$enrolloment_no);
mysqli_stmt_execute($knownStmt);
mysqli_stmt_close($knownStmt);
}
}
}
?>
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