如何更改JSON字符串中的所有值php [duplicate]

I want to change the date value from "15/03/2019 07:18:57" to this: "1552634337".

Here is the code:

<?php 
$dtime = DateTime::createFromFormat("d/m/Y G:i:s", "15/03/2019 07:18:57");
echo $timestamp = $dtime->getTimestamp();
?>

but I want to do this to all the values ​​of "date".

json:

[{
  "id": "6326",
  "type": "0",
  "date": "15/03/2019 07:18:57",
  "message": "test",
  "count": 17
},
{
  "id": "6326",
  "type": "0",
  "date": "15/03/2019 07:18:57",
  "message": "test",
  "count": 17
}]

THANKS!

</div>

try like this :

$datas = json_decode("your_json_string", true);
foreach($datas as $key => $value) {
    $dtime = DateTime::createFromFormat("d/m/Y G", $value['date']);
    $timestamp = $dtime->getTimestamp();
    $datas[$key]['date'] = $timestamp;
}

I think that the best way is to convert your JSON data to a PHP array using json_decode('YOUR_JSON', true).

Suppose that you have the array data in a variable named $datas

Then use foreach() to change the date like this:

$dtime = DateTime::createFromFormat("d/m/Y G:i:s", "15/03/2019 07:18:57");
$timestamp = $dtime->getTimestamp();

foreach($datas as $data) {
    $data['date'] = $timestamp;
}