得到陣列PHP的foreach父鍵

Question

我有一個數組$ ARR：

Array 
(
[2] => Array 
    (
     [status] => 0 
     [item] => Food Processer 
     [catagory] => Appliance 
    ) 

[23] => Array 
    (
     [status] => 1 
     [item] => 12 cup medium muffin tray 
     [catagory] => Kitchenware 
    ) 

[24] => Array 
    (
     [status] => 1 
     [item] => 24 cup mini muffin tray 
     [catagory] => Kitchenware 
    ) etc... 

我想對每個元素的錶行結束：

<tr id="2" class="0"><td>Food Processer</td><td>Appliance</td></tr> 

我當前的代碼是：

foreach ($arr as $a) 
    { 
    echo('<tr id="'.key($a).'" class="'.$a['status'].'">'); 
     echo('<td>'); 
     echo($a['item']); 
     echo('</td>'); 
     echo('<td>'); 
     echo($a['catagory']); 
     echo('</td>'); 

     echo('</tr>'); 
    } 

，但我得到的狀態鍵（字符串「狀態」）作爲id的值我怎樣才能得到父$ ARR鍵即（2,23,24）。

Answer 1

數量應指定爲您的ID在foreach一個變量：

foreach ($arr as $key => $data) { 
    echo('<tr id="'.$key.'" class="'.$data['status'].'">'); 
    echo('<td>'); 
    echo($data['item']); 
    echo('</td>'); 
    echo('<td>'); 
    echo($data['catagory']); 
    echo('</td>'); 
    echo('</tr>'); 
} 

Answer 2

通常像這樣：

foreach($array as $key=>$element) {...} 

$key應該是你正在尋找

Answer 3

Array 
(
[2] => Array 
    (
     [status] => 0 
     [item] => Food Processor 
     [category] => Appliance 
    ) 
} 

（拼寫）

foreach ($arr as $key=>$a){ 

    // $a['status'] will be 0 
    // $a['item'] will be 'Food Processor' 
    // $a['category'] will be 'Appliance' 
    // $key will be 2 
} 

Answer 4

foreach ($arr as $key => $value) { 

echo "key: {$key} --- value: {$value}"; 

}