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Are you saying that when you select "1" from the dropdown then $_GET['cr'] contains "2"

You don't show your <select> tag - can you confirm the name = 'cr' ?

It looks OK but check the source code of your form page to make sure the menu is built correctly.

Some general points …

  1. As you are updating data your form method should be POST and not GET
  2. strip_tags hasn't been required since magic_quotes were deprecated decades ago
  3. mysqli_real_escape_string is not used with prepared queries,

You are executing the query TWICE. The part in the if() condition isn't checking the results of the first execution - it is executing the query a second time and the if condition is acting based upon the true/false response of that second execution.

$stmt = $DBcon->prepare("UPDATE Codes SET UserID = ? WHERE UserID = ? LIMIT ?");
$stmt->bind_param('iii', $subida, $userida, $cra);
$stmt->execute();  //FIRST EXECUTION

if(!$stmt->execute()) { //SECOND EXECUTION
    echo "Error: " . mysqli_error($DBcon);
}else{
    echo "Success adding user : $subida with : $cra  ";
		echo "<meta http-equiv=Refresh content=1;url=Subseller.php?success=1 >";
}

You can either execute ONCE within the if() condition or assign the result of the first execution to a variable and check the value of the variable in your if() condition

$stmt->bind_param('iii', $subida, $userida, $cra);
$result = $stmt->execute();

if(!$result) {
    echo "Error: " . mysqli_error($DBcon);

 

Edited by Psycho

Shame on me for missing that!

@techker To save having to test if every mysqli function call worked or not, tell it to throw an exception automatically. It keeps your code a lot cleaner. Call mysqli_report() before you connect to the db.

 mysqli_report(MYSQLI_REPORT_ERROR|MYSQLI_REPORT_STRICT);

 $mydb = mysqli_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);

 

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