Assets include

gistfile1.php

<?php

define('_ROOT', dirname(realpath(__FILE__)));

function assets_include_tag($assets, $tmpl, $options)
{
    if (empty($assets)) {
        return false;
    }

    $assetOptions = '';
    $assetOutput  = array();

    foreach ($options as $key => $value) {
        $assetOptions .= " {$key}=\"{$value}\"";
    }

    foreach ($assets as $asset) {
        $filepath = _ROOT . "/{$asset}";
        if (is_file($filepath)) {
            array_push($assetOutput, sprintf($tmpl, "{$asset}?v=" . filemtime($filepath), $assetOptions));
        }
    }

    return implode(PHP_EOL, $assetOutput) . PHP_EOL;
}

function javascript_include_tag($assets, $options = array())
{
    $default = array('type' => 'text/javascript');
    return assets_include_tag($assets, '<script src="%s"%s></script>', array_merge($default, $options));
}

function stylesheet_link_tag($assets, $options = array())
{
    $default = array('rel' => 'stylesheet', 'type' => 'text/css', 'media' => 'all');
    return assets_include_tag($assets, '<link href="%s"%s />', array_merge($default, $options));
}

// Examples of usage:
// <?php echo stylesheet_link_tag(array('stylesheets/all.css')) ?>
// <?php echo javascript_include_tag(array('javascripts/all.js')) ?>
// <?php echo javascript_include_tag(array('javascripts/search.js'), array('charset' => 'UTF-8')) ?>

?>