sign.php

<?php

require_once 'init.php';
require_once 'model.php';
require_once 'helpers.php';
require_once 'myfunction.php';

$users = get_users($con);
$emails = array_column($users, 'email');
$projects = [];
$project_id = null;

if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $required = ['email', 'password', 'name'];
    $errors = [];

    $rules = [
        'email' => function ($value) use ($emails) {
            return validate_email($value, $emails);
        },
        'password' => function ($value) {
            return validate_length($value, 8, 15);
        },
        'name' => function ($value) {
            return validate_name($value);
        }
    ];

    $user_form = filter_input_array(
        INPUT_POST,
        [
            'email' => FILTER_DEFAULT,
            'password' => FILTER_DEFAULT,
            'name' => FILTER_DEFAULT
        ],
        true
    );

    foreach ($user_form as $key => $value) {
        if (!empty($rules[$key])) {
            $rule = $rules[$key];
            $errors[$key] = $rule($value);
        }

        if (in_array($key, $required) && empty($value)) {
            $errors[$key] = "Поле $key надо заполнить";
        }
    }

    $errors = array_filter($errors);

    if (count($errors)) {
        $page_content = include_template(
            'register.php',
            [
                'user' => $user_form,
                'errors' => $errors
            ]
        );
    } else {
        $result = add_user($con, $user_form);
        if ($result) {
            $user_id = mysqli_insert_id($con);

            header("Location: index.php");
        }
    }
} else {
    $page_content = include_template('register.php');
}

$navigation_content = include_template(
    'navigation.php',
    [
        'user' => [],
        'projects' => $projects,
        'project_id' => $project_id,
        'content' => $page_content
    ]
);

$layout_content = include_template(
    'layout.php',
    [
        'user' => [],
        'navigation' => $navigation_content,
        'title' => 'Дела в порядке'
    ]
);

print($layout_content);