我正在尝试将当前请求的页面标记为在我的菜单中处于活动状态，但似乎出现了问题......我和我的同事无法弄清楚出了什么问题......我一直在尝试现在想出这个已经超过一个星期，我已经阅读了这个和其他网站上的几十个问题和答案，但无济于事。
让我感到困惑的一件事就是$ page的值似乎从一个字符串变为一个数字，你可以通过我已经实现的调试来判断。
这是index.php的相关代码：
$pages = array('home','overons','onsteam','organisatie','diensten','aandeslag',
'ictlab','eendagbij','opdrachtgevers','verwijzers',
'trajectbegeleiding','contact');
if(in_array($_GET['p'], $pages)) {
$content = $_GET['p'];
} else {
$content = "home";
}
echo "<!-- content = ".$content." -->\n";
require($inc_path.'navbar'.$php_ext);
和navbar.php中的代码：
$menu = array (
'home',
'overons' => array (
'onsteam',
'organisatie'
),
'diensten' => array (
'aandeslag',
'ictlab',
'eendagbij'
),
'opdrachtgevers',
'verwijzers' => array (
'trajectbegeleiding'
),
'contact'
);
$pagenames = array (
'home' => 'Home',
'overons' => 'Over Ons',
'onsteam' => 'Ons Team',
'organisatie' => 'Organisatie',
'diensten' => 'Diensten',
'aandeslag' => 'Aan De Slag',
'ictlab' => 'ICT Lab',
'eendagbij' => 'Een dag bij',
'opdrachtgevers' => 'Opdrachtgevers',
'verwijzers' => 'Verwijzers',
'trajectbegeleiding' => 'Traject begeleiding',
'contact' => 'Contact'
);
function MakeMenu($menu, $currentpage, $level = 0) {
echo "<!-- MakeMenu0: currentpage = ".$currentpage." -->\n";
global $pagenames;
$ret = "";
$indent = str_repeat(" ", $level * 2);
if ($level!=0) {
$ret .= "<!-- MakeMenu1: Level = ".$level." -->\n";
$ret .= sprintf("%s<ul class=\"dropdown-menu\">\n", $indent);
} else {
$ret .= "<!-- MakeMenu2: Level = 0 -->\n";
$ret .= sprintf("%s<ul class=\"nav navbar-nav\">\n", $indent);
}
$indent = str_repeat(" ", ++$level * 2);
foreach ($menu as $page => $subpages) {
if (!is_numeric($page)) {
if ($page==$currentpage) {
$ret .= "<!-- MakeMenu3: page (".$page.") = currentpage (".$currentpage.") -->\n";
if (is_array($subpages)) {
$ret .= sprintf("%s<li class=\"active dropdowm\"><a href='?p=%s'>%s<span class='caret'></span></a>", $indent, $page, $pagenames[$page]);
} else {
$ret .= sprintf("%s<li class=\"active\"><a href='?p=%s'>%s</a>", $indent, $page, $pagenames[$page]);
}
} else {
$ret .= "<!-- MakeMenu4: page (".$page.") != currentpage (".$currentpage.") -->\n";
if (is_array($subpages)) {
$ret .= sprintf("%s<li class=\"dropdown\"><a href='?p=%s'>%s<span class='caret'></span></a>", $indent, $page, $pagenames[$page]);
} else {
$ret .= sprintf("%s<li><a href='?p=%s'>%s</a>", $indent, $page, $pagenames[$page]);
}
}
}
if (is_array($subpages)) {
$ret .= "\n";
$ret .= MakeMenu($subpages, $currentpage, $level + 1);
$ret .= $indent;
} else if (strcmp($page, $subpages)) {
if ($page==$currentpage){
$ret .= "<!-- MakeMenu5: page (".$page.") = currentpage (".$currentpage.") -->\n";
$ret .= sprintf("%s<li class=\"active\"><a href='?p=%s'>%s</a>", $indent, $subpages, $pagenames[$subpages]);
} else {
$ret .= "<!-- MakeMenu6: page (".$page.") != currentpage (".$currentpage.") -->\n";
$ret .= sprintf("%s<li><a href='?p=%s'>%s</a>", $indent, $subpages, $pagenames[$subpages]);
}
}
$ret .= sprintf("</li>\n", $indent);
}
$indent = str_repeat(" ", --$level * 2);
$ret .= sprintf("%s</ul>\n", $indent);
return($ret);
}
echo MakeMenu($menu, $content);
非常令人费解的输出：
<!-- MakeMenu0: currentpage = overons -->
<!-- MakeMenu0: currentpage = overons -->
<!-- MakeMenu0: currentpage = overons -->
<!-- MakeMenu0: currentpage = overons -->
<!-- MakeMenu2: Level = 0 -->
<ul class="nav navbar-nav">
<!-- MakeMenu5: page (0) = currentpage (overons) -->
<li class="active"><a href='?p=home'>Home</a></li>
<!-- MakeMenu3: page (overons) = currentpage (overons) -->
<li class="active dropdowm"><a href='?p=overons'>Over Ons<span class='caret'></span></a>
<!-- MakeMenu1: Level = 2 -->
<ul class="dropdown-menu">
<!-- MakeMenu5: page (0) = currentpage (overons) -->
<li class="active"><a href='?p=onsteam'>Ons Team</a></li>
<!-- MakeMenu6: page (1) != currentpage (overons) -->
<li><a href='?p=organisatie'>Organisatie</a></li>
</ul>
</li>
<!-- MakeMenu4: page (diensten) != currentpage (overons) -->
<li class="dropdown"><a href='?p=diensten'>Diensten<span class='caret'></span></a>
<!-- MakeMenu1: Level = 2 -->
<ul class="dropdown-menu">
<!-- MakeMenu5: page (0) = currentpage (overons) -->
<li class="active"><a href='?p=aandeslag'>Aan De Slag</a></li>
<!-- MakeMenu6: page (1) != currentpage (overons) -->
<li><a href='?p=ictlab'>ICT Lab</a></li>
<!-- MakeMenu6: page (2) != currentpage (overons) -->
<li><a href='?p=eendagbij'>Een dag bij</a></li>
</ul>
</li>
<!-- MakeMenu6: page (1) != currentpage (overons) -->
<li><a href='?p=opdrachtgevers'>Opdrachtgevers</a></li>
<!-- MakeMenu4: page (verwijzers) != currentpage (overons) -->
<li class="dropdown"><a href='?p=verwijzers'>Verwijzers<span class='caret'></span></a>
<!-- MakeMenu1: Level = 2 -->
<ul class="dropdown-menu">
<!-- MakeMenu5: page (0) = currentpage (overons) -->
<li class="active"><a href='?p=trajectbegeleiding'>Traject begeleiding</a></li>
</ul>
</li>
<!-- MakeMenu6: page (2) != currentpage (overons) -->
<li><a href='?p=contact'>Contact</a></li>
</ul>
答案 0 :(得分：0)
关于令人费解的行为：
让我感到困惑的一件事是$ page的价值如何 通过调试可以告诉您从字符串更改为数字 我已经实施了。
如果仔细观察这一行：
foreach ($menu as $page => $subpages) {
您将看到数组的键被分配给$page。从您的阵列：
$menu = array (
'home',
'overons' => array(
'onsteam',
'organisatie'
),
'diensten' => array(
'aandeslag',
'ictlab',
'eendagbij'
),
'opdrachtgevers',
'verwijzers' => array(
'trajectbegeleiding'
),
'contact'
);
我们可以看到有些页面是键，有些是值。这就是为什么有时会有页面名称，有时还有数组索引。
您可以将数组定义为以下内容以防止此行为：
$menu = [
'home' => null,
'overons' => [
'onsteam' => null,
'organisatie' => null
],
'diensten' => [
'aandeslag' => null,
'ictlab' => null,
'eendagbij' => null
],
'opdrachtgevers' => null,
'verwijzers' => [
'trajectbegeleiding' => null
],
'contact' => null
];
更进一步，你有一个非常复杂的递归函数。我建议使用PHP Iterators。特别是RecursiveArrayIterator和RecursiveIteratorIterator一起，可以像这样扩展：
class UlRecursiveIteratorIterator extends RecursiveIteratorIterator
{
public function beginIteration()
{
echo '<ul class="nav navbar-nav">', PHP_EOL;
}
public function endIteration()
{
echo '</ul>', PHP_EOL;
}
public function beginChildren()
{
echo str_repeat(' ', $this->getDepth() + 1), '<ul class="dropdown-menu">', PHP_EOL;
}
public function endChildren()
{
echo str_repeat(' ', $this->getDepth() + 1), '</ul>', PHP_EOL;
echo str_repeat(' ', $this->getDepth()), '</li>', PHP_EOL;
}
}
有了这个迭代器，你的函数可以重构为一个简单的foreach循环：
$iterator = new RecursiveArrayIterator($menu);
$iterator = new UlRecursiveIteratorIterator(
$iterator,
RecursiveIteratorIterator::SELF_FIRST
);
foreach ($iterator as $page => $_) {
$active = false;
// Used for pritty print only. Remove in production.
$depth = $iterator->getDepth();
$line = str_repeat(' ', ($depth + 1) + ($depth === 0 ? 0 : 1));
if ($page === $content) {
$active = true;
}
$class = $active ? 'active' : '';
if ($iterator->callHasChildren()) {
$line .= "<li class=\"$class dropdown\"><a href='?p=$page'>{$pagenames[$page]}<span class='caret'></span></a>";
} else {
$line .= "<li class=\"$class\"><a href='?p=$page'>{$pagenames[$page]}</a>";
}
echo $line, PHP_EOL;
}
这是the demo。