php page to list and update sqlite - php

Question

I have the following code to display and modify a simple sqlite table
<?php
$db = new SQLite3("my_sqlite.db");
$query = "SELECT rowid, * FROM students";
$result = $db->query($query);
if( isset($_POST['submit_data']) ){
// Gets the data from post
$name = $_POST['name'];
$email = $_POST['email'];
$query = "UPDATE students set name='$name', email='$email'";
if( $db->exec($query) ){
echo "Data is updated successfully.";
}else{
echo "Sorry, Data is not updated.";
}
}
?>
<table border="1">
<form action="" method="post">
<tr>
<td>Name</td>
<td>Email</td>
</tr>
<?php while($row = $result->fetchArray()) {?>
<tr>
<td><input name="name" type="text" value="<?php echo $row['name'];?>"></td>
<td><input name="email" type="text" value="<?php echo $row['email'];?>"></td>
</tr>
<?php } ?>
<input name="submit_data" type="submit" value="Update Data">
</form>
</table>
PROBLEM: When I change some of the information and update, the whole column changes into the same change. E.g.: if I write a the name Nick, every name changes into Nick.

Answer 1

First, you should only do updates for one record at a time so each record needs its own update button. Attached is the corresponding rơwid of the record. you can use:
<input type="hidden" name="rowid" value="$row['rowid]">
You should add a WHERE clause to the update statement to know exactly which records should be updated.If you omit the WHERE clause, ALL records will be updated!