index.php

<?php
include_once 'Sample_Header.php';
$requirements = array(
    'php'   => array('PHP 5.3.0', version_compare(phpversion(), '5.3.0', '>=')),
    'xml'   => array('PHP extension XML', extension_loaded('xml')),
    'zip'   => array('PHP extension ZipArchive (optional)', extension_loaded('zip')),
    'xmlw'  => array('PHP extension XMLWriter (optional)', extension_loaded('xmlwriter')),
);
if (!CLI) {
?>
<div class="jumbotron">
<p>Welcome to PHPProject, a library written in pure PHP that provides a set of classes to write to and read from different document file formats, i.e. GanttProject (.gan) and MS Project (.mpx).</p>
<p>&nbsp;</p>
<p>
    <a class="btn btn-lg btn-primary" href="https://github.com/PHPOffice/PHPProject" role="button"><i class="fa fa-github fa-lg" title="GitHub"></i>  Fork us on Github!</a>
    <a class="btn btn-lg btn-primary" href="http://phpproject.readthedocs.org/en/develop/" role="button"><i class="fa fa-book fa-lg" title="Docs"></i>  Read the Docs</a>
</p>
</div>
<?php
}
if (!CLI) {
    echo "<h3>Requirement check:</h3>";
    echo "<ul>";
    foreach ($requirements as $key => $value) {
        list($label, $result) = $value;
        $status = $result ? 'passed' : 'failed';
        echo "<li>{$label} ... <span class='{$status}'>{$status}</span></li>";
    }
    echo "</ul>";
    include_once 'Sample_Footer.php';
} else {
    echo 'Requirement check:' . PHP_EOL;
    foreach ($requirements as $key => $value) {
        list($label, $result) = $value;
        $status = $result ? '32m passed' : '31m failed';
        echo "{$label} ... \033[{$status}\033[0m" . PHP_EOL;
    }
}