PHP：如何使用$ _GET从字面上读取参数字符？

Question

I am trying to create a subnav that echos "current" when the script finds itself on the appropriate page and subpage.

My issue is that when $subpage == $encoded_subpage_name?"current":"" is compared, subnav names with spaces always equal false because $encoded_subpage_name will have a + but $subpage won't.

<?php

    if (isset($_GET['p'])) {
        $page = $_GET['p'];
    } else {
        $page = "";
    }
    if (isset($_GET['subp'])) {
        $subpage = $_GET['subp'];
    } else {
        $subpage = "";
    }

    $subpages = array(
        "powered by company",
        "text messaging",
        "the app",
        "NFC",
        "your membership",
        "faq",
        "privacy policy",
        "terms &amp; conditions"
    );


    function buildSubNav($page, $subpages) {
        foreach ($subpages as $subpage) {
            $encoded_subpage_name = urlencode($subpage);
            echo '<li class="' . selected_subpage($encoded_subpage_name) . '"><a href="?p=' . $page . '&subp=' . $encoded_subpage_name . '"> ' . $subpage . '</a></li>';
        }
    }
    function selected_subpage($encoded_subpage_name) {
        global $subpage;
        $subpage = ($subpage);
        echo $subpage;
        return $subpage == $encoded_subpage_name?"current":"";
    }


?>
<ul>
    <?php buildSubNav($page, $subpages); ?>
</ul>

Answer 1

The problem you're having is that you're encoding in the middle of your work instead of at the end when you're actually outputting. Stop doing that.