Question

我发现动态面包屑的代码非常好：

<?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>

似乎正在页面上工作。我可以确切地看到它是我想要的，但我在面包屑上方得到一个错误：

严格标准：只有变量才能通过引用传递给......

它正在呼吁第35行：

$last = end(array_keys($path));

我不确定这意味着什么，我已经看过相关问题，但似乎无法理解它以及它如何影响这一点。如果有人能帮助我理解，那将是值得赞赏的。

Answer 1

前几天我也遇到了同样的错误。只需替换以下代码行：

$last = end(array_keys($path));

这一个：

 $full_path = array_keys($path);
 $last = end($full_path);

严格标准：只应通过引用传递变量 - 动态面包屑

1 个答案: