php update dynamic sql rows through form - php

Question

My goal is to retrieve a dynamic SQL list of rows and edit every item in the list within the same page using POST (no multiple changes at once required). Can this be achieved within the same page? I made the script below which displays everything the way i want to, however the switch statement doesn't seem to be fit for purpouse.
I am aware this code might not be best practice (not to mention secure). Sorry for being inflexible, but i'm not allowed to use anything other then PHP/HTML
Code:
<?php
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo '<tr> <td class="tg">' .$row["id"]. '</td>' . "\n";
echo '<td class="tg"> <form action= "" method="post"> <input type="text" name="voornaam" value="'.$row["voornaam"].'" style="width:100px"> <input name="submit" type ="submit" value="Aanpassen"><br/><br/>' . '</td>' . "\n";
echo '<td class="tg"> <form action= "" method="post"> <input type="text" name="voornaam" value="'.$row["achternaam"].'" style="width:100px"> <input name="submit" type ="submit" value="Aanpassen"><br/><br/>' . '</td>' . "\n";
echo '<td class="tg"> <form action= "" method="post"> <input type="text" name="voornaam" value="'.$row["omschrijving"].'" style="width:500px"> <input name="submit" type ="submit" value="Aanpassen"><br/><br/>' . '</td> </tr>' . "\n";
}
} else {
echo "0 resultaten";
}
switch(!empty($_POST))
{
case !empty($_POST[$row["voornaam"]]):
// update SQL query 'firstname' here
break;
}
$conn->close();
?>

Answer 1

By this way you actualy see what you are editing and it's more clean.
// PDO DB conecction (secure way)
try {
$con = new PDO("mysql:host={$host};dbname={$db_name}", $username, $password);
$con->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}catch(PDOException $exception){ //to handle connection error
echo "Connection error: " . $exception->getMessage();
}
if isset($_POST["voornaam"]){
$stmt = $con->prepare(" QUERY");
$stmt->execute();
echo "YEAH you did it";
} else {
stmt = $con->prepare(" QUERY");
$stmt->execute();
$rows = $stmt->fetchAll();
foreach ($rows as $rs)
{
$voornaam = $rs["voornaam"]
$achternaam = $rs["achternaam"]
$omschrijving = $rs["omschrijving"]
}
}
// Just an example
echo '<form action= "" method="post"> <input type="text" name="voornaam" value="'. $voornaam .'" style="width:100px"><input name="submit" type ="submit" value="Submit"><br/><br/>';
Value is also the input so you can have only one Submit button at the end cause all other data will be overwritten by itself.

Answer 2

<?php
if ($result->num_rows > 0)
{
// output data of each row
while($row = $result->fetch_assoc())
{
echo '<tr> <td class="tg">' .$row["id"]. '</td>' . "\n";
echo '<td class="tg"> <form action= "" method="post"> <input type="text" name="voornaam" value="'.$row["voornaam"].'" style="width:100px"> <input name="submit" type ="submit" value="Aanpassen"><br/><br/>' . '</td>' . "\n";
echo '<td class="tg"> <form action= "" method="post"> <input type="text" name="voornaam" value="'.$row["achternaam"].'" style="width:100px"> <input name="submit" type ="submit" value="Aanpassen"><br/><br/>' . '</td>' . "\n";
echo '<td class="tg"> <form action= "" method="post"> <input type="text" name="voornaam" value="'.$row["omschrijving"].'" style="width:500px"> <input name="submit" type ="submit" value="Aanpassen"><br/><br/>' . '</td> </tr>' . "\n";
}
}
else
{
echo "0 resultaten";
}
if( isset( $_POST[$row["voornaam"]] ) && !empty( $_POST[$row["voornaam"]] ) )
{
// update SQL query 'firstname' here
}
$conn->close();
?>

Answer 3

In your switch you're sending !empty($_POST) so boolean (true or false) so unique cases would be: True or False...
It's better if you change your switch to:
if(isset($_POST[$row["voornaam"]]) && !empty($_POST[$row["voornaam"]])){
// update SQL query 'firstname' here
}