function ipm_remove_end_slash($script_path)
{
    if (substr($script_path, -1) == '/') {
        $script_path = substr($script_path, 0, strlen($script_path) - 1);
        $script_path = ipm_remove_end_slash($script_path);
    }
    return $script_path;
}
<?php

include 'includes/header.php';
if (!isset($_SESSION['install_data']) || $_SESSION['install_data']['stage'] < 3) {
    header('Location: index.php');
}
if (isset($_POST['next'])) {
    if (!empty($_POST['site_name'])) {
        if (!empty($_POST['domain'])) {
            $ipm_install->set_form('site_name', $_POST['site_name']);
            $ipm_install->set_form('domain', strtolower($_POST['domain']));
            $ipm_install->set_form('script_path', ipm_remove_end_slash($_POST['script_path']));
            $ipm_install->set_form('port', (int) $_POST['port']);
            $ipm_install->set_form('https', $_POST['https'] ? 1 : 0);
            $_SESSION['install_data']['stage'] = 4;
            header('Location: user.php');
        } else {
            $message = 'Domain Empty';
        }
    } else {
        $message = 'Site Name Empty';
    }
}
include 'includes/html-header.php';
?>

<div id="page-body">
	<div id="sidebar">
		<div id="help" class="widget">
			<h2>Help</h2>
			<p>All the settings on this page can be changed after install.</p>