Question

我有一个二维数组，格式如下所示。如何使用user_id仅输出implode()，以便最终结果为1705,1757,1832？

 Array ( 
    [0] => 
    Array ( 
        [nickname] => picachu 
        [user_id] => 1705 
        [name] => picachu .jpg 
        [city_name] => pallet town
    ) 
    [1] =>
     Array (
       [nickname] => charmander 
       [user_id] => 1757  
       [name] => charmander.jpg 
       [city_name] => verivian city 
    ) 
    [2] =>
    Array ( 
       [nickname] => squaretle 
       [user_id] => 1832 
       [name] => squaretle.jpg 
       [city_name] => Celadon 
    ) 
)

Answer 1

PHP 5.5：

$result = join(',', array_column($data, 'user_id'));

5.3＆LT; =＆PHP LT = 5.4：

$result = join(',', array_map(function($item)
{
   return $item['user_id'];
}, $data));

PHP＆LT; 5.3：

$result = join(',', array_map(create_function('$item', 'return $item["user_id"];')));

Answer 2

$nested_array = array();
foreach($array as $a) {
    $nested_array[] = $a['user_id'];
}
$implode = implode(',',$nested_array);

OR

$implode = '';
foreach($array as $a) {
    $implode .= $a['user_id'] . ',';
}
$implode = substr($implode,-1);

Answer 3

你可以试试这个：

foreach ($array as $row)
{
  $values[] = $row['user_id'];

}
$user_id= implode(',', $values);

echo $user_id;
?>

Answer 4

您也可以尝试：

implode(', ', array_map(function($k){ return $k['user_id'];}, $arr));

如何在二维数组的某些字段上进行内爆？

4 个答案: