Interpolates a handlebars style template with given data

interpolate.php

<?php
/**
 * Interpolates a handlebars style template with the given data.
 *
 * e.g: interpolate('Hello, {{ name }}', ['name' => 'Joe Bloggs']);
 *
 * @param string $template
 * @param array  $data
 * @return string mixed
 */
function interpolate($template, $data)
{
    return preg_replace_callback('/{{\s*([^}\s]+)\s*}}/', function ($matches) use ($data) {
        if (isset($data[$matches[1]])) {
            return $data[$matches[1]];
        }

        return $matches[0];
    }, $template);
}