如何使用foreach循環提取多維數組？
[英]How to extract a multidimensional array using foreach loop?
問題描述
大家好，我在這里需要一些有關提取數組的幫助，這是我的下面的數組：
Array
(
[11] => Array
(
[category_id] => 11
[parent_id] => 1
[id_path] => 1/11
[category] => Filipino
[position] => 10
[status] => A
[seo_name] => filipino-en
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 1
[subcategories] => Array
(
[0] => Array
(
[category_id] => 42
[parent_id] => 11
[id_path] => 1/11/42
[category] => Adobo
[position] => 10
[status] => A
[seo_name] => adobo
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 2
)
[1] => Array
(
[category_id] => 43
[parent_id] => 11
[id_path] => 1/11/43
[category] => Sinigang
[position] => 20
[status] => A
[seo_name] => singang
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 2
)
[2] => Array
(
[category_id] => 44
[parent_id] => 11
[id_path] => 1/11/44
[category] => Kare-Kare
[position] => 30
[status] => A
[seo_name] => kare-kare
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 2
)
[3] => Array
(
[category_id] => 45
[parent_id] => 11
[id_path] => 1/11/45
[category] => Dinuguan
[position] => 40
[status] => A
[seo_name] => dinuguan-en
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 2
)
[4] => Array
(
[category_id] => 4
[parent_id] => 1
[id_path] => 1/4
[category] => Continental
[position] => 20
[status] => A
[seo_name] => continental
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 1
[subcategories] => Array
(
[0] => Array
(
[category_id] => 12
[parent_id] => 4
[id_path] => 1/4/12
[category] => American
[position] => 10
[status] => A
[seo_name] => american
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 2
[subcategories] => Array
(
[0] => Array
(
[category_id] => 54
[parent_id] => 12
[id_path] => 1/4/12/54
[category] => Burger
[position] => 10
[status] => A
[seo_name] => burger
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 3
)
[1] => Array
(
[category_id] => 55
[parent_id] => 12
[id_path] => 1/4/12/55
[category] => Steak
[position] => 20
[status] => A
[seo_name] => steak-en
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 3
)
[2] => Array
(
[category_id] => 56
[parent_id] => 12
[id_path] => 1/4/12/56
[category] => Turkey
[position] => 30
[status] => A
[seo_name] => turkey
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 3
)
[3] => Array
(
[category_id] => 57
[parent_id] => 12
[id_path] => 1/4/12/57
[category] => Salad
[position] => 40
[status] => A
[seo_name] => salad
[age_verification] => N
[age_limit] => 0
[age_warning_message] =>
[level] => 3
)
如何使用以下格式提取數組：
-Filipino
- Adobo
- Sinigang
- Kare Kare
-Continental
- American
- Burger
- Steak
- Turkey
- Salad
我有以下代碼：
foreach($categories_tree as $k=>$v){
if($v.subcategories){
echo "<div class=\"w900 h024 ";
echo $v['level'] == 1 ? "ml024" : "ml048";
echo '" >'."\n";
echo "<a href=\"\" class=\"w010 h010 p007 b03 d2 f1\">\n";
echo "<div class=\"it3 ib3 il3 jt05 jb05 jl10 kt04 kb04 kl03\"></div>\n";
echo "</a>\n";
echo "<div class=\"tw2 w839 h012 pt006 pb005 pl012 b04 ir3 ib3 jr01 jb01 kr02 kb02 f1\">\n";
echo "<input type=\"checkbox\" class=\"f1 w012 h012 m000 f1\" value=\"".$v['category_id']."\" />\n";
echo "<p class=\"ml012 f1\">".$v['category']."</p>\n";
echo "<div class=\"r3\"></div>\n";
echo "</div>\n";
echo "<div class=\"r3\"></div>\n";
echo "</div>\n";
//echo $v;
}else{
}
}
$ categories_tree是我的主要數組。 現在，如果我運行代碼，它將顯示：
- Filipino
- Continental
- Asian
- Others
但是我想創建一個子類別。 我怎樣才能做到這一點？
2 個解決方案
解決方案1
3 2013-10-16 07:39:04
使用array_walk_recursive循環遍歷嵌套數組
function output_categories($item, $index) {
if (array_key_exists('category', $item) {
echo $item['category'];
}
}
array_walk_recursive($categories_tree, "output_categories");
此函數循環遍歷數組的每個元素並應用回調，在本例中為output_categories 。 為了使輸出與所需內容保持一致，請始終確保在輸出之前有適當的條件。
您在輸出中看到的實際上是一個不包含關聯鍵“ category”的數組的鍵。 找到它時，它正在輸出第一個字母...請嘗試上述條件，如果它仍在輸出第一個字母，則僅在其他地方有錯誤。
解決方案2
0 2013-10-16 07:35:01
創建一個遞歸函數
未經測試的例子
function ReadCats($var)
{
foreach($var as $cat)
{
echo $cat['category'];
if(isset($cat['subcategories'])
{
$ReadCats($cats['subcategories'];
]
}
}
如何在這種類型的多維數組上使用foreach循環進行分析？
[英]How to analyse using foreach loop on this type of multidimensional array?
如何使用foreach循環顯示多維關聯數組的值
[英]how to display values of a multidimensional associative array using foreach loop
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