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

<?php

// platform_check.php @generated by Composer

$issues = array();

if (!(PHP_VERSION_ID >= 0 && PHP_VERSION_ID < 99999)) {
    $issues[] = 'Your Composer dependencies require a PHP version ">= 0" and "< 99999". You are running ' . PHP_VERSION  .  '.';
}

$missingExtensions = array_diff(array (
  0 => 'json',
  1 => 'xml',
), array_map('strtolower', get_loaded_extensions()));

if (0 !== count($missingExtensions)) {
    $issues[] = 'Your Composer dependencies require the following PHP extensions to be installed: ' . implode(', ', $missingExtensions);
}

if (0 !== count($issues)) {
    die('Composer detected issues in your platform:' . "\n\n" . implode("\n", $issues));
}