递归循环数组的每个路径 [英] Recursively cycle every path of an array
问题描述
我有以下(json)对象:
I have the following(json) object:
$obj = json_decode('{
"Group1": {
"Blue": {
"Round": [
"Harold",
"Arthur",
"Tom"
]
},
"Green": {
"Round": [
"Harold"
],
"Circle": [
"Todd",
"Mike"
]
}
},
"Group2": {
"Blue": {
"Round": [
"Peter"
]
}
}
}', true);
我试图弄清楚如何递归地遍历它,以便可以看到数组中所有不同的路径.
I'm trying to figure out how to recursively travel through it so I can see all the different paths that is in the array.
它可以是4个单独的回显或4行字符串. >
可以替换为任何东西或根本不替换.如果每行分别回显或推入可能会提供最大灵活性的数组.
It could be 4 separate echo's or a 4 line string. The >
could be replaced with anything or nothing at all. If each line was echo'd separately or pushed to an array that would probably give the most flexibility.
Group1 - Blue - Round - (Harold, Arthur, Tom)
Group1 - Green - Round - (Harold)
Group1 - Green - Circle - (Todd, Mike)
Group2 - Blue - Round - (Peter)
我无法将其包裹住,因此将不胜感激.
I can't wrap my head around it so any help would be appreciated.
我想我可以以某种方式在每个人之间循环:
I'm thinking I can somehow cycle through each like:
foreach($obj as $index => $value)
{
// and then somehow do this until you reach an array?
}
推荐答案
仅在给定样本上进行了测试.但是,如果增加阵列级别,这应该可以工作.我主要使用RecursiveIteratorIterator
类函数
Tested only on the given sample. But this should work if array levels are increased. I mainly use RecursiveIteratorIterator
class functions
// Initialize RecursiveIteratorIterator
$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($obj), RecursiveIteratorIterator::SELF_FIRST);
$paths = array(); // Paths storage
foreach ($iterator as $k => $v) { // Loop thru each iterator
if (!$iterator->hasChildren()) { // Check if iterator hasChildren is false
$innermost = $iterator->getSubIterator($iterator->getDepth()); // Get innermost child which is the array
for ($p = array(), $i = 0, $z = $iterator->getDepth(); $i <= $z; $i++) { // Loop and push each path to the innermost array
$p[] = $iterator->getSubIterator($i)->key();
}
array_pop($p); // Remove key
$innermost = (array)$innermost; // Cast innermost to array
$p[] = '(' . implode(', ', $innermost) . ')'; // push formatted innermost array to path
$path = implode(' - ', $p); // implode the path
$paths[] = $path; // store to list of paths array
}
}
$paths = array_unique($paths); // remove exactly same paths
foreach ($paths as $value) { // Loop and echo each path
echo $value.'<br>';
}
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