I have refereed and tried many solutions provided in this type of question threads before asking my question as none of them working properly for me. I have one mysql table of students which stores stud name, marks. I am retrieving that data from database using while loop.
$query="select * from student";
$rs= mysql_query($query) or die(mysql_error());
<?php if(mysql_num_rows($rs)){ ?>
<table border="5" cellspacing="5" width="50%" align="center">
<tr>
<th>No</th>
<th>Name</th>
<th>Marks</th>
<th>Operation</th>
<th> <input type ="submit" name="delete" value="Delete"></th>
</tr>
<?php
while($row=mysql_fetch_array($rs))
{
?>
<tr>
<th><?php echo $row['rollno']; ?></th>
<th><?php echo $row['name']; ?></th>
<th><?php echo $row['marks']; ?></th>
<th><a href="AllOperation.php?&no=<?php echo $row['rollno']; ?>&name=<?php echo $row['name']; ?>&marks=<?php echo $row['marks']; ?>">View</a></th>
<th><input type="checkbox" name="check[]" value="<?php echo $row['marks']; ?>" <?php if(isset($_POST['check'])) if (in_array($row['marks'], $_POST['check'])) echo "checked='checked'"; ?> /></th>
</tr>
<tr>
<?php } ?>
<input type ="submit" name="total" value="total">
And i am generating the total of marks of all the students
if(isset($_POST['total']))
{ $t=0;
foreach($_REQUEST['check'] as $val)
{
$t=$t+$val;
}
echo " total : ".$t;
}
Now problem is that when first time i run the program it displays 5 student's information and than i selected first two checkbox and press the "total" button to generate the total. So it displays the total properly and keep that two check boxes checked. But when i checked third checkbox and press the "total" button than it shows the total of that three selected check box's marks but it display 4th or last checkbox checked even if i did't checked it. So why that is happening.
