want to place part of php code somewhere else on page - php

Question

I'm very new to php. I found some CMS like code for east text editing here on SO and now I'm trying to implement it on our micro site.
My problem is, that I want login error report to show on exact position on the page - just under the login button.
Can someone tell me how can I put that error report text whereever I want? I don't want to override it with CSS positioning.
In basic, I want to put that p class="error":
<?php
if (empty($_POST) && isset($_GET['action'])) {
$action = $_GET['action'];
switch ($action) {
case 'logout':
session_unset();
session_destroy();
break;
}
}
if (!isset($_SESSION['user'])) {
$user = '';
$pass = '';
if (isset($_POST['login'])) {
$user = strtolower(trim($_POST['user']));
$pass = $_POST['pass'];
$errors = array();
if ($user == '' || $user != '1') {
$errors['user'] = '';
}
if ($pass == '' || $pass != '1') {
$errors['pass'] = '';
}
if (empty($errors)) {
$_SESSION['user'] = $user;
} else {
echo '<p class="error">Insert correct ';
if (isset($errors['user']))
echo 'name';
if (count($errors) == 2)
echo ' a ';
if (isset($errors['pass']))
echo 'password';
echo '.</p>', "\n";
}
}
}
if (isset($_SESSION['user'])) {
$user = $_SESSION['user'];
?>
somewhere else in the whole code of my page. Do I need to cut out something from that php code, or do I need to write new part of code for that?
Thank you for you help, Matej

Answer 1

Instead of just doing 'echo' all over the place, which means you get output at the place where the PHP code is embedded in the page, set some flags/message variables to output later.
e.g.
<?php
$errors = false;
$msgs = '';
if (....) {
$errors = true;
$msgs = "something dun gone wrong";
}
?>
... various bits of your html go here ...
<?php if ($errors) { echo $msgs; } ?>
... more html here ...