requirements.php

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<?php
use Elgg\Database\DbConfig;
use Elgg\Http\Request;
use Elgg\Router\RewriteTester;

$icon_ok = elgg_view_icon('check');
$icon_warning = elgg_view_icon('exclamation-triangle');
$icon_error = elgg_view_icon('times');

$view_module = function($icon, $title, $value = '', $subtext = '') {
    $body = elgg_format_element('strong', [], $title);
    if (!elgg_is_empty($value)) {
        $body .= elgg_format_element('span', ['class' => 'mlm'], $value);
    }
    
    if (!elgg_is_empty($subtext)) {
        $body .= elgg_format_element('div', ['class' => 'elgg-subtext'], $subtext);
    }
    
    return elgg_view_image_block($icon, $body, ['class' => 'elgg-admin-information-row']);
};

// php version
$icon = $icon_ok;
$title = elgg_echo('admin:server:label:php_version');
$value = PHP_VERSION;
$subtext = '';

if (version_compare(PHP_VERSION, \ElggInstaller::PHP_MINIMAL_VERSION, '<')) {
    $icon = $icon_error;
    $subtext = elgg_echo('admin:server:label:php_version:required_version', [\ElggInstaller::PHP_MINIMAL_VERSION]);
}

echo $view_module($icon, $title, $value, $subtext);

// php required extensions
$extensions = get_loaded_extensions();
$requiredExtensions = [
    'pdo_mysql',
    'json',
    'xml',
    'gd',
];
foreach ($requiredExtensions as $extension) {
    $icon = $icon_ok;
    $title = elgg_echo('admin:server:requirements:php_extension', [$extension]);
    $value = elgg_echo('status:enabled');
    $subtext = '';
    
    if (!in_array($extension, $extensions)) {
        $icon = $icon_error;
        $value = elgg_echo('status:unavailable');
        $subtext = elgg_echo('admin:server:requirements:php_extension:required');
    }
    
    echo $view_module($icon, $title, $value, $subtext);
}

// php recommended extensions
$recommendedExtensions = [
    'mbstring',
];
foreach ($recommendedExtensions as $extension) {
    $icon = $icon_ok;
    $title = elgg_echo('admin:server:requirements:php_extension', [$extension]);
    $value = elgg_echo('status:enabled');
    $subtext = '';
    
    if (!in_array($extension, $extensions)) {
        $icon = $icon_warning;
        $value = elgg_echo('status:unavailable');
        $subtext = elgg_echo('admin:server:requirements:php_extension:recommended');
    }
    
    echo $view_module($icon, $title, $value, $subtext);
}

// php ini
if (empty(ini_get('session.gc_probability')) || empty(ini_get('session.gc_divisor'))) {
    $title = elgg_echo('admin:server:requirements:gc');
    $subtext = elgg_echo('admin:server:requirements:gc:info');
    echo $view_module($icon_warning, $title, elgg_echo('status:disabled'), $subtext);
}

// db server information
$db = _elgg_services()->db;
$version = $db->getServerVersion();
$min_version = $db->isMariaDB() ? \ElggInstaller::MARIADB_MINIMAL_VERSION : \ElggInstaller::MYSQL_MINIMAL_VERSION;
$server = $db->isMariaDB() ? 'mariadb' : $db->getConnection(DbConfig::READ_WRITE)->getDatabasePlatform()->getName();
$subtext = '';
$icon = $icon_ok;

if (!in_array($server, ['mysql', 'mariadb']) || version_compare($version ?: '0', $min_version, '<')) {
    $subtext = elgg_echo('admin:server:requirements:database:server:required_version', [$min_version]);
    $icon = $icon_error;
}

echo $view_module($icon, elgg_echo('admin:server:requirements:database:server'), "{$server} v{$version}", $subtext);

// db client information
$client_parts = explode('\\', get_class($db->getConnection(DbConfig::READ_WRITE)->getDriver()));
$client_parts = array_slice($client_parts, 3);
$client = implode(' ', $client_parts);

$subtext = '';
$icon = $icon_ok;

if ($client !== 'PDO MySQL Driver') {
    $subtext = elgg_echo('admin:server:requirements:database:client:required');
    $icon = $icon_error;
}

echo $view_module($icon, elgg_echo('admin:server:requirements:database:client'), $client, $subtext);

// rewrite test
$url = elgg_http_add_url_query_elements(Request::REWRITE_TEST_TOKEN, [
    Request::REWRITE_TEST_TOKEN => 1,
]);
$url = elgg_normalize_site_url($url);

$tester = new RewriteTester();

$icon = $icon_ok;
$title = elgg_echo('admin:server:requirements:rewrite');
$value = elgg_echo('ok');
$subtext = '';

if (!$tester->runRewriteTest($url)) {
    $icon = $icon_error;
    $value = elgg_echo('error');
    $subtext = elgg_echo('admin:server:requirements:rewrite:fail');
}

echo $view_module($icon, $title, $value, $subtext);

$icon = _elgg_services()->imageService->hasWebPSupport() ? $icon_ok : $icon_error;
echo $view_module($icon, elgg_echo('admin:server:requirements:webp'));