从平面文件数组创建多维数组
Create multidimensional array from flat file array
我有一个这样的数组:
$arr = array(
'home.js' => new File(),
'view/index.html' => new File(),
'src/index.js' => new File(),
'src/libs/jquery.js' => new File()
);
现在我想转换成这样的结构:
Array
(
[0] => Array
(
[text] => home.js
)
[1] => Array
(
[text] => view
[children] => Array
(
[0] => Array
(
[text] => index.html
)
)
)
[2] => Array
(
[text] => src
[children] => Array
(
[0] => Array
(
[text] => index.js
)
[1] => Array
(
[text] => libs
[children] => Array
(
[0] => Array
(
[text] => jquery.js
)
)
)
)
)
)
我在 StackOverfow 答案的帮助下尝试了几个小时,但我无法想出解决方案,因为所有其他问题都有不同的设置。
编辑:
到目前为止,我在 SO 的帮助下得到的是(尽管不记得确切的答案):
$out = array();
foreach($arr as $path => $file) {
$parts = explode('/', trim($path, '/'));
applyChain($out, $parts, $file);
}
function applyChain(&$arr, $parts, $value)
{
if (!is_array($parts)) {
return;
}
if (count($parts) == 0) {
$arr = $value;
} else {
array_shift($parts);
applyChain($arr[], $parts, $value);
}
}
print_r($out);
我不知道它到底是如何工作的,尤其是 applyChain($arr[] ...
部分。它有点适用于深度,但不适用于文件名。我得到以下输出:
Array
(
[0] => File Object
(
)
[1] => Array
(
[0] => File Object
(
)
)
[2] => Array
(
[0] => File Object
(
)
)
[3] => Array
(
[0] => Array
(
[0] => File Object
(
)
)
)
)
使用 explode()
和 eval()
可以在几行内找到解决方案。但是 eval()
不被认为是干净的,所以让我们尝试递归:
<?php
class File {
}
$arr = array(
'home.js' => new File(),
'view/index.html' => new File(),
'src/index.js' => new File(),
'src/libs/jquery.js' => new File()
);
function sub($path) {
$rv = array();
$parts = explode('/', $path, 2); // strip off one level
$rv['text'] = $parts[0]; // put it into 'text' element
if (count($parts)>1) // is there anything left?
$rv['children'] = sub($parts[1]); // do the same for the rest of the path
return $rv;
}
$new = array();
foreach (array_keys($arr) as $file) {
$new[] = sub($file);
}
var_dump($new);
?>
但是,正如 Peter 评论的那样,即使路径有某些共同点(如 src/libs/jquery.js
和 src/libs/melon.js
),这也会创建单独的子结构。
使用丑陋的eval()
(以后可以替换)得到如下代码:
<?php
class File {
}
$arr = array(
'home.js' => new File(),
'view/index.html' => new File(),
'src/index.js' => new File(),
'src/libs/jquery.js' => new File(),
'src/libs/melon.js' => new File(),
);
// conversion
function sub($element) {
$rv = array();
foreach (array_keys($element) as $sub) {
$part['text'] = $sub;
if (is_array($element[$sub])) {
$part['children'] = sub($element[$sub]);
}
$rv[] = $part;
}
return $rv;
}
// create array with path file/folder names as keys
$new = array();
foreach (array_keys($arr) as $row) {
$def = '$new["'.preg_replace('&/&', '"]["', $row).'"] = 1;';
eval($def);
}
// run
$new2 = sub($new);
var_dump($new2);
?>
这输出
array(3) {
[0]=>
array(1) {
["text"]=>
string(7) "home.js"
}
[1]=>
array(2) {
["text"]=>
string(4) "view"
["children"]=>
array(1) {
[0]=>
array(1) {
["text"]=>
string(10) "index.html"
}
}
}
[2]=>
array(2) {
["text"]=>
string(3) "src"
["children"]=>
array(2) {
[0]=>
array(1) {
["text"]=>
string(8) "index.js"
}
[1]=>
array(2) {
["text"]=>
string(4) "libs"
["children"]=>
array(2) {
[0]=>
array(1) {
["text"]=>
string(9) "jquery.js"
}
[1]=>
array(1) {
["text"]=>
string(8) "melon.js"
}
}
}
}
}
}
我有一个这样的数组:
$arr = array(
'home.js' => new File(),
'view/index.html' => new File(),
'src/index.js' => new File(),
'src/libs/jquery.js' => new File()
);
现在我想转换成这样的结构:
Array
(
[0] => Array
(
[text] => home.js
)
[1] => Array
(
[text] => view
[children] => Array
(
[0] => Array
(
[text] => index.html
)
)
)
[2] => Array
(
[text] => src
[children] => Array
(
[0] => Array
(
[text] => index.js
)
[1] => Array
(
[text] => libs
[children] => Array
(
[0] => Array
(
[text] => jquery.js
)
)
)
)
)
)
我在 StackOverfow 答案的帮助下尝试了几个小时,但我无法想出解决方案,因为所有其他问题都有不同的设置。
编辑:
到目前为止,我在 SO 的帮助下得到的是(尽管不记得确切的答案):
$out = array();
foreach($arr as $path => $file) {
$parts = explode('/', trim($path, '/'));
applyChain($out, $parts, $file);
}
function applyChain(&$arr, $parts, $value)
{
if (!is_array($parts)) {
return;
}
if (count($parts) == 0) {
$arr = $value;
} else {
array_shift($parts);
applyChain($arr[], $parts, $value);
}
}
print_r($out);
我不知道它到底是如何工作的,尤其是 applyChain($arr[] ...
部分。它有点适用于深度,但不适用于文件名。我得到以下输出:
Array
(
[0] => File Object
(
)
[1] => Array
(
[0] => File Object
(
)
)
[2] => Array
(
[0] => File Object
(
)
)
[3] => Array
(
[0] => Array
(
[0] => File Object
(
)
)
)
)
使用 explode()
和 eval()
可以在几行内找到解决方案。但是 eval()
不被认为是干净的,所以让我们尝试递归:
<?php
class File {
}
$arr = array(
'home.js' => new File(),
'view/index.html' => new File(),
'src/index.js' => new File(),
'src/libs/jquery.js' => new File()
);
function sub($path) {
$rv = array();
$parts = explode('/', $path, 2); // strip off one level
$rv['text'] = $parts[0]; // put it into 'text' element
if (count($parts)>1) // is there anything left?
$rv['children'] = sub($parts[1]); // do the same for the rest of the path
return $rv;
}
$new = array();
foreach (array_keys($arr) as $file) {
$new[] = sub($file);
}
var_dump($new);
?>
但是,正如 Peter 评论的那样,即使路径有某些共同点(如 src/libs/jquery.js
和 src/libs/melon.js
),这也会创建单独的子结构。
使用丑陋的eval()
(以后可以替换)得到如下代码:
<?php
class File {
}
$arr = array(
'home.js' => new File(),
'view/index.html' => new File(),
'src/index.js' => new File(),
'src/libs/jquery.js' => new File(),
'src/libs/melon.js' => new File(),
);
// conversion
function sub($element) {
$rv = array();
foreach (array_keys($element) as $sub) {
$part['text'] = $sub;
if (is_array($element[$sub])) {
$part['children'] = sub($element[$sub]);
}
$rv[] = $part;
}
return $rv;
}
// create array with path file/folder names as keys
$new = array();
foreach (array_keys($arr) as $row) {
$def = '$new["'.preg_replace('&/&', '"]["', $row).'"] = 1;';
eval($def);
}
// run
$new2 = sub($new);
var_dump($new2);
?>
这输出
array(3) {
[0]=>
array(1) {
["text"]=>
string(7) "home.js"
}
[1]=>
array(2) {
["text"]=>
string(4) "view"
["children"]=>
array(1) {
[0]=>
array(1) {
["text"]=>
string(10) "index.html"
}
}
}
[2]=>
array(2) {
["text"]=>
string(3) "src"
["children"]=>
array(2) {
[0]=>
array(1) {
["text"]=>
string(8) "index.js"
}
[1]=>
array(2) {
["text"]=>
string(4) "libs"
["children"]=>
array(2) {
[0]=>
array(1) {
["text"]=>
string(9) "jquery.js"
}
[1]=>
array(1) {
["text"]=>
string(8) "melon.js"
}
}
}
}
}
}