composer/tests/Composer/Test/Autoload/Fixtures/platform/no_php_required.php

<?php

// platform_check.php @generated by Composer

$issues = array();

$missingExtensions = array();
extension_loaded('json') || $missingExtensions[] = 'json';
extension_loaded('xml') || $missingExtensions[] = 'xml';

if ($missingExtensions) {
    $issues[] = 'Your Composer dependencies require the following PHP extensions to be installed: ' . implode(', ', $missingExtensions);
}

if ($issues) {
    trigger_error(
        'Composer detected issues in your platform: ' . implode(', ', $issues),
        E_USER_ERROR
    );
}