[英]Create a JSON tree view in PHP using delimiter
我正在嘗試為我正在嘗試的項目創建一個文件瀏覽器類型 treeview JSON 以供 FancyTree 讀取。
這些文件存儲在數據庫中,具有 ID、名稱、URL、類型和代碼字段。 模擬數據庫如下所示:
ID name URL. Type code
1 test dir.dir1 txt sometext
2 next dir.dir1 txt somemoretext
3 main dir txt evenmoretext
我需要從這些數據中構建 JSON 樹視圖,使用 URL 作為路徑(句點是分隔符)並且文件位於最終目錄中,因此樹看起來像
/dir/dir1/test.txt
/dir/dir1/next.txt
/dir/main.txt
FancyTree JSON output 應該看起來像
[
{
"title": "dir",
"folder": true,
"children": [
{
"title": "dir1",
"folder": true,
"children": [
{
"title": "test.txt",
"key": 1
}, {
"title": "next.txt",
"key": 2
}
]
}, {
"title": "main.txt",
"key": 3
}
]
}
]
目前,我正在將數據庫中的數據放入 $scriptArray
SELECT 'name','url','type','id' FROM.....
然后我正在排序並構建一棵樹
$url = array_column($scriptArray, 'url');
array_multisort($url, SORT_ASC, $scriptArray);
$result = [];
foreach($scriptArray as $item) {
$loop = 0;
$keys = array_reverse(explode('.', $item->url));
$tmp = $item->name;
$tmp2 = $item->type;
foreach ($keys as $keyid => $key) {
if($loop == 0) {
$tmp = ["title" => $tmp.".".$tmp2, 'key' => $item->id];
} else {
$tmp = ["title" => $keys[$keyid - 1], "folder" => true, "children" => [$tmp]];
}
$loop++;
}
$tmp = ["title" => $keys[count($keys)-1], "folder" => true, "children" => [$tmp]];
$result[] = $tmp;
}
但是,我得到的 output 是。
[
{
"title": "dir",
"folder": true,
"children": [
{
"title": "dir2",
"folder": true,
"children": [
{
"title": "test.txt",
"key": 1
}
]
}
]
},
{
"title": "dir",
"folder": true,
"children": [
{
"title": "dir2",
"folder": true,
"children": [
{
"title": "next.txt",
"key": 2
}
]
}
]
},
{
"title": "main.txt",
"key": 3
}
]
我曾嘗試應用 array_merge、array_merge_recursive 和其他各種但沒有成功。 有人能幫忙嗎?
除非您事先知道文件夾層次結構的最大深度,否則使用循環將不起作用。
更好的解決方案是“遞歸”構建文件夾路徑,並將 append 文件放到最終文件夾中。
這可以通過使用&
操作符創建一個引用來實現,並導航到它的子節點直到整個路徑被構建:
$result = array();
foreach($files as $file)
{
// build the directory path if needed
$directories = explode('.', $file->url); // get hierarchy of directories
$currentRoot = &$result ; // set the pointer to the root directory per default
foreach($directories as $directory)
{
// check if directory already exists in the hierarchy
$dir = null ;
foreach($currentRoot as $i => $d)
{
if($d['folder'] and $d['title'] == $directory)
{
$dir = &$currentRoot[$i] ;
break ;
}
}
// create directory if missing
if(is_null($dir))
{
$item = array(
'title' => $directory,
'folder' => true,
'children' => array()
);
$currentRoot[] = $item ;
$dir = &$currentRoot[count($currentRoot)-1];
}
// move to the next level
$currentRoot = &$dir['children'] ;
unset($dir);
}
// finally append the file in the latest directory
$currentRoot[] = array(
'title' => $file->name . '.' . $file->type,
'key' => $file->id,
);
unset($currentRoot);
}
echo json_encode($result);
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