PHP 多维数组 w/Parent ID 到类别分类法数组,Ebay 样式
PHP Multi-Dimensional Array w/Parent ID to Category Taxonomy Array, Ebay Style
已经走了几天了,准备辞职了。我打电话给 eBay 的交易 API 到 return 类别列表。下面的数组显示了这些类别是如何从 API 中 return 编辑的。我拼命想把它安排成一个分类法,就像下面的第一个灰色框一样。
请注意,每行开头的数字是该特定行的最终类别的 ID。
3270: Vehicle Electronics & GPS
175716: Vehicle Electronics & GPS > Car Audio
18805: Vehicle Electronics & GPS > Car Audio > Car Subwoofers
18795: Vehicle Electronics & GPS > Car Audio > Car Amplifiers
39754: Vehicle Electronics & GPS > Car Audio > Car Audio In-Dash Units
我已将此数组大大缩短为一个示例。将抽取许多类别来构建分类法。
CategoryLevel 可以从任意数字开始,也可以以任意数字结束。在这个例子中,它从 2 开始,最高级别是 4。
Array
(
[3270] => Array
(
[CategoryID] => 3270
[CategoryLevel] => 2
[CategoryName] => Vehicle Electronics & GPS
[CategoryParentID] => 293
)
[175716] => Array
(
[CategoryID] => 175716
[CategoryLevel] => 3
[CategoryName] => Car Audio
[CategoryParentID] => 3270
)
[79839] => Array
(
[CategoryID] => 79839
[CategoryLevel] => 4
[CategoryName] => Signal Processors
[CategoryParentID] => 175716
[LeafCategory] => true
)
[18805] => Array
(
[CategoryID] => 18805
[CategoryLevel] => 4
[CategoryName] => Car Subwoofers
[CategoryParentID] => 175716
[LeafCategory] => true
)
[18795] => Array
(
[CategoryID] => 18795
[CategoryLevel] => 4
[CategoryName] => Car Amplifiers
[CategoryParentID] => 175716
[LeafCategory] => true
)
[39754] => Array
(
[CategoryID] => 39754
[CategoryLevel] => 4
[CategoryName] => Car Audio In-Dash Units
[CategoryParentID] => 175716
[LeafCategory] => true
)
)
提前感谢您的帮助!
编辑:再次修复错误。
<?php
require_once("samplearray.php");
function makeNestedData($data){
//create a nested tree using the above structure
$nested = array();
//loop over each category
foreach($data as &$category){
//is there is no children array, add it
if(!isset($category['Children'])){
$category['Children'] = array();
}
//check if there is a matching parent
if(isset($data[$category['CategoryParentID']])){
//add this under the parent as a child by reference
if(!isset($data[$category['CategoryParentID']]['Children'])){
$data[$category['CategoryParentID']]['Children'] = array();
}
$data[$category['CategoryParentID']]['Children'][$category['CategoryID']] = &$category;
//else, no parent found, add at top level
} else {
$nested[$category['CategoryID']] = &$category;
}
}
unset($category);
return $nested;
}
//now flatten out the nested array recursively
function flattenNested($nested, $parent=''){
$out = array();
foreach($nested as $category){
$categoryName = $parent.$category['CategoryName'];
$out[$category['CategoryID']] = $categoryName;
//recurse for each child
$out += flattenNested($category['Children'], $categoryName.' > ');
}
return $out;
}
$result = flattenNested(makeNestedData($array));
print_r($result);
输出:
Array
(
[3270] => Vehicle Electronics & GPS
[175716] => Vehicle Electronics & GPS > Car Audio
[79839] => Vehicle Electronics & GPS > Car Audio > Signal Processors
[18805] => Vehicle Electronics & GPS > Car Audio > Car Subwoofers
[18795] => Vehicle Electronics & GPS > Car Audio > Car Amplifiers
[39754] => Vehicle Electronics & GPS > Car Audio > Car Audio In-Dash Units
)
输出是一个数组,右边的类别id为键,值为带有类别文本的字符串。
这似乎是一种复杂或不必要的方法,但这确实是 IMO 的更好方法之一,因为它可以处理类别的任何顺序和任何数量的嵌套级别。唯一的限制与递归和可能的内存有关,但我尝试在可能的情况下使用引用以使内存占用尽可能小。
已经走了几天了,准备辞职了。我打电话给 eBay 的交易 API 到 return 类别列表。下面的数组显示了这些类别是如何从 API 中 return 编辑的。我拼命想把它安排成一个分类法,就像下面的第一个灰色框一样。
请注意,每行开头的数字是该特定行的最终类别的 ID。
3270: Vehicle Electronics & GPS
175716: Vehicle Electronics & GPS > Car Audio
18805: Vehicle Electronics & GPS > Car Audio > Car Subwoofers
18795: Vehicle Electronics & GPS > Car Audio > Car Amplifiers
39754: Vehicle Electronics & GPS > Car Audio > Car Audio In-Dash Units
我已将此数组大大缩短为一个示例。将抽取许多类别来构建分类法。
CategoryLevel 可以从任意数字开始,也可以以任意数字结束。在这个例子中,它从 2 开始,最高级别是 4。
Array
(
[3270] => Array
(
[CategoryID] => 3270
[CategoryLevel] => 2
[CategoryName] => Vehicle Electronics & GPS
[CategoryParentID] => 293
)
[175716] => Array
(
[CategoryID] => 175716
[CategoryLevel] => 3
[CategoryName] => Car Audio
[CategoryParentID] => 3270
)
[79839] => Array
(
[CategoryID] => 79839
[CategoryLevel] => 4
[CategoryName] => Signal Processors
[CategoryParentID] => 175716
[LeafCategory] => true
)
[18805] => Array
(
[CategoryID] => 18805
[CategoryLevel] => 4
[CategoryName] => Car Subwoofers
[CategoryParentID] => 175716
[LeafCategory] => true
)
[18795] => Array
(
[CategoryID] => 18795
[CategoryLevel] => 4
[CategoryName] => Car Amplifiers
[CategoryParentID] => 175716
[LeafCategory] => true
)
[39754] => Array
(
[CategoryID] => 39754
[CategoryLevel] => 4
[CategoryName] => Car Audio In-Dash Units
[CategoryParentID] => 175716
[LeafCategory] => true
)
)
提前感谢您的帮助!
编辑:再次修复错误。
<?php
require_once("samplearray.php");
function makeNestedData($data){
//create a nested tree using the above structure
$nested = array();
//loop over each category
foreach($data as &$category){
//is there is no children array, add it
if(!isset($category['Children'])){
$category['Children'] = array();
}
//check if there is a matching parent
if(isset($data[$category['CategoryParentID']])){
//add this under the parent as a child by reference
if(!isset($data[$category['CategoryParentID']]['Children'])){
$data[$category['CategoryParentID']]['Children'] = array();
}
$data[$category['CategoryParentID']]['Children'][$category['CategoryID']] = &$category;
//else, no parent found, add at top level
} else {
$nested[$category['CategoryID']] = &$category;
}
}
unset($category);
return $nested;
}
//now flatten out the nested array recursively
function flattenNested($nested, $parent=''){
$out = array();
foreach($nested as $category){
$categoryName = $parent.$category['CategoryName'];
$out[$category['CategoryID']] = $categoryName;
//recurse for each child
$out += flattenNested($category['Children'], $categoryName.' > ');
}
return $out;
}
$result = flattenNested(makeNestedData($array));
print_r($result);
输出:
Array
(
[3270] => Vehicle Electronics & GPS
[175716] => Vehicle Electronics & GPS > Car Audio
[79839] => Vehicle Electronics & GPS > Car Audio > Signal Processors
[18805] => Vehicle Electronics & GPS > Car Audio > Car Subwoofers
[18795] => Vehicle Electronics & GPS > Car Audio > Car Amplifiers
[39754] => Vehicle Electronics & GPS > Car Audio > Car Audio In-Dash Units
)
输出是一个数组,右边的类别id为键,值为带有类别文本的字符串。
这似乎是一种复杂或不必要的方法,但这确实是 IMO 的更好方法之一,因为它可以处理类别的任何顺序和任何数量的嵌套级别。唯一的限制与递归和可能的内存有关,但我尝试在可能的情况下使用引用以使内存占用尽可能小。