Extracting from database to textarea - php

Question

I'm comparing current data with updated data to check whether there are changes in information, and add the changes to a new table changes:
if (isset($_POST['submit']))
{
$sql = "SHOW COLUMNS FROM Employees";
$result = mysqli_query($con,$sql);
while($row = mysqli_fetch_array($result)){
$tempname = $row['Field'];
$sql2 = "UPDATE Employees SET ".$row['Field']."= '$_POST[$tempname]' WHERE AFNumber='".$_GET["af"]."'";
$result2 = mysqli_query($con,$sql2);
if ($con->query($sql2) === TRUE) {
} else {
echo "Error: " . $sql2 . "<br>" . $con->error;
echo '<script>swal("Error", "Something went wrong '.$con->error.'", "error");</script>';
}
$sqlOldData = "SELECT * FROM Employees WHERE AFNumber='".$_GET["af"]."' AND (".$row['Field']." NOT LIKE '".$_POST[$tempname]."')";
$result3 = $con->query($sqlOldData);
if ($result3->num_rows > 0) {
while($row3 = $result3->fetch_assoc()) {
$sql3 = "INSERT INTO Changes (Table, AFNumber, Attribute,DateChanged,HRUser,OldValue,NewValue)
VALUES ('Employees', '".$_GET["af"]."', '".$row["Field"]."', '".date('dd/m/Y HH:mm:ss')."', '$login_session', '.$row3[0]', '$_POST[$tempname]')";
if ($con->query($sql3) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql3 . "<br>" . $con->error;
}
}
} else {
echo "0 results";
}
}
Now i want to extract information about the changes such as date user ... And put them in a textarea tag in this form:
<textarea name="changes" rows="50" cols="59" disabled>
12/07/2015 - User:"Mike" Changed:"Actual Location" From: "blabla" to "bla"
</textarea>
But I'm not sure how to do this, any help please...

Answer 1

Without knowing much about your data (for example what AFNumber is) I would suggest simply querying everything from the Changes table, and displaying them in the desired form:
$changes = $con->query("SELECT * FROM Changes WHERE Table = 'Employees'");
if ($changes->num_rows > 0) {
echo '<textarea name="changes" rows="50" cols="59" disabled>' . "\n";
while ($row = $changes->fetch_assoc()) {
echo sprintf('%s - User:%s Chnaged:"%s" From: "%s" to "%s"',
$row['DateChanged'], $row['HRUser'], $row['Attribute'],
$row['OldValue'], $row['NewValue']) . "\n";
}
echo "</textarea>";
}
To display the data I simply use echo here, but using some template system shouldn't make much difference to the core concept of the solution.

Answer 2

From your comment, you have the following code :
$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = $conn->query($sql);
if ($result->num_rows > 0)
{
// output data of each row
while($row = $result->fetch_assoc())
{
echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
}
}
else
{
echo "0 results";
}
$conn->close();
To get the information into a text area in the way you are doing, use:
echo '<textarea name="changes" rows="50" cols="59" disabled>id:' . $row['id' . ' - Name: ' . $row['firstname'] . ' ' . $row['lastname'] . '</textarea>';