Json 编码数组值

Question

如何将来自特定数组键的所有值分配给 json 值。$cars = Array ( [0] => Array ( [category] => Most Selling [title] => BMW [price] => 20000 ) [1] => Array ( [category] => Most Selling [title] => Jeep [price] => 15000) [2] => Array ( [category] => Most Selling [title] => Lexus [price] => 18000  ) )foreach ( $cars as $car) {     $data = [    'model' => 'new',    'company' => $car['title'],];}$json = json_encode($data); 现在当我输出 $json 我得到：{"model":"new","company":"Lexus"}为什么它没有像这样分配所有标题值？{"model":"new","company":"BMW, Jeep, Lexus"}

Answer 1

你不需要foreach循环。您可以使用implode和array_column

$data = [

  'model'   => 'new',

  'company' => implode(', ',array_column($cars, 'title'))

];

echo $json = json_encode($data);

现场演示：https : //3v4l.org/9IrW8

Answer 2

这应该会产生您需要的输出。

$data = [

    'model' => 'new',

    'company' => '',

];

foreach ( $cars as $car) {

     $data['company'] .= $car['title'] . ', ';

}

$data['company'] = substr($data['company'], 0, -2); // remove last comma and space

$json = json_encode($data);

Answer 3

$companyString = implode(', ', array_column($cars, 'title'));

$data = [

   'model' => 'new',

   'company' => $companyString

];

$json = json_encode($data);