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[英]How to sort the list of files name and write them in a JSON using php?
[英]How to get a list of files of subfolders and write them in a JSON using php?
我已经能够列出所有文件名和当前目录/文件夹,但我不知道如何为子目录创建 JSON 条目
这是我的代码
<?php
$dir = "office/";
if(is_dir($dir)){
if($dh = opendir($dir)){
while(($file = readdir($dh)) != false){
if($file != "." and $file != ".."){
$files_array[] = array('file' => $file); // Add the file to the array
}
}
}
$return_array =array('dir' => $files_array);
exit (json_encode($return_array));
}
?>
输出是
{
"dir": [
{
"file": "FreeWallpapersApp.zip"
},
{
"file": "20151211_ClipArtForTextView.7z"
},
{
"file": "QRite.7z"
},
{
"file": "CustomDialog_app_contacts.zip"
},
{
"file": "LockScreenBasicApp.apk"
},
{
"file": "ImgViewEffects.zip"
},
]
}
如何使用 php 在子文件夹中显示文件以生成子目录中的文件名。
实现目录递归列表的一种方法是使用递归函数。
/*
* Converts a filesystem tree to a PHP array.
*/
function dir_to_array($dir)
{
if (! is_dir($dir)) {
// If the user supplies a wrong path we inform him.
return null;
}
// Our PHP representation of the filesystem
// for the supplied directory and its descendant.
$data = [];
foreach (new DirectoryIterator($dir) as $f) {
if ($f->isDot()) {
// Dot files like '.' and '..' must be skipped.
continue;
}
$path = $f->getPathname();
$name = $f->getFilename();
if ($f->isFile()) {
$data[] = [ 'file' => $name ];
} else {
// Process the content of the directory.
$files = dir_to_array($path);
$data[] = [ 'dir' => $files,
'name' => $name ];
// A directory has a 'name' attribute
// to be able to retrieve its name.
// In case it is not needed, just delete it.
}
}
// Sorts files and directories if they are not on your system.
\usort($data, function($a, $b) {
$aa = isset($a['file']) ? $a['file'] : $a['name'];
$bb = isset($b['file']) ? $b['file'] : $b['name'];
return \strcmp($aa, $bb);
});
return $data;
}
/*
* Converts a filesystem tree to a JSON representation.
*/
function dir_to_json($dir)
{
$data = dir_to_array($dir);
$data = json_encode($data);
return $data;
}
在你的例子中,
echo dir_to_json('office/');
会输出这个
{
"dir": [
{
"file": "FreeWallpapersApp.zip"
},
{
"file": "20151211_ClipArtForTextView.7z"
},
// ...
{
"dir": [
{
"file": "App.zip"
},
{
"file": "View.7z"
},
"name": "A Directory With Files",
]
},
]
}
我更新了答案以明确对文件和目录进行排序。
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