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<?php//add.php
 include('conn.php');
 $firstName = cleanup($_POST['firstName']);
 $lastName = cleanup($_POST['lastName']);
 $age = cleanup($_POST['age']);
 
 $sql = "INSERT INTO users (`firstName`, `lastName`, `age`) VALUES ('".$firstName."','".$lastName."','".$age."')";
 if(mysqli_query($conn, $sql)){
 echo 'success';
 }else{
 echo 'error '. mysqli_error($conn);
 }
 
 mysqli_close($conn);
 
 
 ?>
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