PHP：使用递归函数嵌套的菜单中，展开只有一些节点（不是所有的树） [英] PHP: nested menu with a recursive function, expand only some nodes (not all the tree)
问题描述
我有这样的阵列，名为 $嵌套（这是一个漫长的，但我试图让一个COM prehensive情景）：
I have this array, called $nested (it's a long one, but I tried to get a comprehensive scenario):
Array
(
[1] => Array
(
[id] => 1
[parent] => 0
[title] => Page 1
)
[2] => Array
(
[id] => 2
[parent] => 0
[title] => Page 2
)
[3] => Array
(
[id] => 3
[parent] => 0
[title] => Page 3
)
[4] => Array
(
[id] => 4
[parent] => 0
[title] => Page 4
)
[5] => Array
(
[id] => 5
[parent] => 0
[title] => Page 5
)
[6] => Array
(
[id] => 6
[parent] => 1
[title] => Page 1-1
)
[7] => Array
(
[id] => 7
[parent] => 1
[title] => Page 1-2
)
[8] => Array
(
[id] => 8
[parent] => 1
[title] => Page 1-3
)
[9] => Array
(
[id] => 9
[parent] => 2
[title] => Page 2-1
)
[10] => Array
(
[id] => 10
[parent] => 2
[title] => Page 2-2
)
[11] => Array
(
[id] => 11
[parent] => 2
[title] => Page 2-3
)
[12] => Array
(
[id] => 12
[parent] => 3
[title] => Page 3-1
)
[13] => Array
(
[id] => 13
[parent] => 3
[title] => Page 3-2
)
[14] => Array
(
[id] => 14
[parent] => 4
[title] => Page 4-1
)
[15] => Array
(
[id] => 15
[parent] => 6
[title] => Page 1-1-1
)
[16] => Array
(
[id] => 16
[parent] => 6
[title] => Page 1-1-2
)
[17] => Array
(
[id] => 17
[parent] => 6
[title] => Page 1-1-3
)
[18] => Array
(
[id] => 18
[parent] => 7
[title] => Page 1-2-1
)
[19] => Array
(
[id] => 19
[parent] => 7
[title] => Page 1-2-2
)
[20] => Array
(
[id] => 20
[parent] => 7
[title] => Page 1-2-3
)
[21] => Array
(
[id] => 21
[parent] => 9
[title] => Page 2-1-1
)
[22] => Array
(
[id] => 22
[parent] => 9
[title] => Page 2-1-2
)
[23] => Array
(
[id] => 23
[parent] => 9
[title] => Page 2-1-3
)
)
通过这个递归函数：
function recursive($parent, $array) {
$has_children = false;
foreach($array as $key => $value) {
if ($value['parent'] == $parent) {
if ($has_children === false && $parent) {
$has_children = true;
echo '<ul>' ."\n";
}
echo '<li>' . "\n";
echo '<a href="/page.php?id=' . $value['id'] . '">' . $value['title'] . '</a>' . " \n";
echo "\n";
recursive($key, $array);
echo "</li>\n";
}
}
if ($has_children === true && $parent) echo "</ul>\n";
}
<ul><?php echo recursive(0, $nested); ?></ul>
我很容易得到这样的输出：
I easily get this output:
- 1
- 1-1页
- Page 1
- Page 1-1
- Page 1-1-1
- Page 1-1-2
- Page 1-1-3
- Page 1-2-1
- Page 1-2-2
- Page 1-2-3
- 页2-1
- Page 2-1
- Page 2-1-1
- Page 2-1-2
- Page 2-1-3
- Page 3-1
- Page 3-2
- Page 4-1
到目前为止好。
现在，我想不要在一次显示整个树，而是更深层次的去当一个页面/子页面的用户点击，像这样的：
Now, I would like NOT to show the whole tree at once, but going deeper when the user clicks on a page/subpage, like this:
网址： http://www.example.com/page.php ，初始状态（扩大与父母的所有项目= 0）
URL: http://www.example.com/page.php, initial state ("expand" all items with parent = 0)
- Page 1
- Page 2
- Page 3
- Page 4
- Page 5
网址： http://www.example.com/page.php?id= 1 （扩大与父母所有项目= 1）
URL: http://www.example.com/page.php?id=1 (expand all items with parent = 1)
- 1
- Page 1
- Page 1-1
- Page 1-2
- Page 1-3
网址： http://www.example.com/page.php?id= 6 （扩大与父= 6的所有项目）
- 1
- 1-1页
- 页1-1-1
- 页1-1-2
- 页1-1-3
- Page 1
- Page 1-1
- Page 1-1-1
- Page 1-1-2
- Page 1-1-3
和等
似乎是一个不可能完成的任务对我来说，任何帮助，好吗？
在此先感谢Seems a mission impossible to me, any help, please? Thanks in advance
推荐答案
最后，这就是我所做的，它的工作原理很细的：
At last that's what I did, it works very fine:
// create array of ancestors' ID from current page function path($page = 0) { global $database_connApp, $connApp; // let's create arrays do { mysql_select_db($database_connApp, $connApp); $query_rsPage = "SELECT pages.pag_id FROM pages WHERE pages.pag_id = " . $page; $rsPage = mysql_query($query_rsPage, $connApp) or die(mysql_error()); $row_rsPage = mysql_fetch_assoc($rsPage); $bid[] = $row_rsPage['pag_id']; $page = $row_rsPage['pag_parent']; } while ($page > 0); // move to the last array index end($bid); $output = $bid; return $output; }
// create the menu function fmenu($parent, $array, $path) { $has_children = false; foreach($array as $key => $value) { if (in_array($value['parent'], $path)) { if ($value['parent'] == $parent) { if ($has_children === false && $parent) { $has_children = true; echo '<ul>' ."\n"; } $active = ($_GET['iData'] == $value['id']) ? ' class="active"' : ''; echo '<li' . $active . '>' . "\n"; echo '<a href="../pagine/' . $value['id'] . '/' . slugify($value['title']) . '.htm">' . html($value['title']) . '</a>' . " \n"; echo "\n"; fmenu($key, $array, $path); echo "</li>\n"; } } } if ($has_children === true && $parent) echo "</ul>\n"; }
echo fmenu(0, $nested, path($row_rsEdit['pag_id']));这篇关于PHP：使用递归函数嵌套的菜单中，展开只有一些节点（不是所有的树）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
- Page 1-1
URL: http://www.example.com/page.php?id=6 (expand all items with parent = 6)
- 1-1页
- Page 1
- Page 2-1
- Page 1-1
- Page 1
- 1-1页
