如何在trick中创建动态面包屑导航 - How to create a dynamic breadcrumb nav in twig

我想在Twig中创建一个动态面包屑导航。示例url www.example.com/section/page我想获取url，将其拆分为一个面包屑，例如：home > section > page我发现这个php代码是有效的。有人能帮我把它转换成Twig吗？

<?php
// This function will take $_SERVER['REQUEST_URI'] and build a breadcrumb based on the user's current path
function breadcrumbs($separator = ' &raquo; ', $home = 'Home') {
    // This gets the REQUEST_URI (/path/to/file.php), splits the string (using '/') into an array, and then filters out any empty values
    $path = array_filter(explode('/', parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)));
    // This will build our "base URL" ... Also accounts for HTTPS :)
    $base = ($_SERVER['HTTPS'] ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . '/';
    // Initialize a temporary array with our breadcrumbs. (starting with our home page, which I'm assuming will be the base URL)
    $breadcrumbs = array("<a href='"$base'">".$home."</a>");
    // Find out the index for the last value in our path array
    //$last = end(array_keys($path));
    // Build the rest of the breadcrumbs
    foreach ($path AS $x => $crumb) {
        // Our "title" is the text that will be displayed (strip out .php and turn '_' into a space)
        $title = ucwords(str_replace(Array('.php', '_'), Array('', ' '), $crumb));
        // If we are not on the last index, then display an <a> tag
        if ($x != $last)
            $breadcrumbs[] = "<a href='"".$base.$crumb."'">".$title."</a>";
        // Otherwise, just display the title (minus)
        else
            $breadcrumbs[] = $title;
    }
    // Build our temporary array (pieces of bread) into one big string :)
    return implode($separator, $breadcrumbs);
}
?>
<p><?= breadcrumbs() ?></p>
<p><?= breadcrumbs(' > ') ?></p>
<p><?= breadcrumbs(' ^^ ', 'Index') ?></p>

您不需要将该函数转换为Twig，只需告诉Twig通过扩展twig:将该函数提供到模板中即可

$twig = new Twig_Environment($loader);
$function = new Twig_SimpleFunction('breadcrumb', function ($separator = ' &raquo; ', $home = 'Home') {
    $path = array_filter(explode('/', parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)));
    // This will build our "base URL" ... Also accounts for HTTPS :)
    $base = ($_SERVER['HTTPS'] ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . '/';
    // Initialize a temporary array with our breadcrumbs. (starting with our home page, which I'm assuming will be the base URL)
    $breadcrumbs = array("<a href='"$base'">".$home."</a>");
    // Find out the index for the last value in our path array
    //$last = end(array_keys($path));
    // Build the rest of the breadcrumbs
    foreach ($path AS $x => $crumb) {
        // Our "title" is the text that will be displayed (strip out .php and turn '_' into a space)
        $title = ucwords(str_replace(Array('.php', '_'), Array('', ' '), $crumb));
        // If we are not on the last index, then display an <a> tag
        if ($x != $last)
            $breadcrumbs[] = "<a href='"".$base.$crumb."'">".$title."</a>";
        // Otherwise, just display the title (minus)
        else
            $breadcrumbs[] = $title;
    }
    // Build our temporary array (pieces of bread) into one big string :)
    return implode($separator, $breadcrumbs);
});
$twig->addFunction($function);

然后，您可以在twig中的任何位置使用此功能：

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" />
    </head>
    <body>
        <nav>
           {{ breadcrumbs() }}
        </nav>
    </body>
</html>