PHP - Send an array from the first page and get it on the second page

I'm trying to send an array with its values from the first page to the second page. On the second page what I want to happen is that it the sent array values will be transferred to a new array. Here's my current progress:

Snippet code of Report_Status.php (First Page / Source, where the array with values is initailized)

$message = array(
            'title' => 'Report Approved!',
            'body' => 'Thank you for reporting! We already approved/verified your report as a legit fire incident. Wait for the firefighters to arrive.'
        );
        while ($User_Row = mysqli_fetch_array($Retrieve_User, MYSQLI_ASSOC)){
            $User_Token[] = $User_Row['User_Token'];
        }
       send_notification($User_Token, $message); //calling a function of the second page. 
//I will replace the it from calling a function to redirecting to a specific web link

This first page retrieves a specific data (which is the user's token) from the database and stores it into an array ($User_Token[]). Initialization.

Snippet code of Push_User_Notification.php (Second page / Destination, where the array with its values will be received.

//Here: there should be the code for catching/receving the array
$Retrieve_Target_Tokens_Query = "SELECT * FROM User WHERE User_Token = $tokens";
$Retrieve_Target_Tokens = mysqli_query($Connection, $Retrieve_Target_Tokens_Query);
$tokens = array();

if(!$Retrieve_Target_Tokens){
    echo "<script type = 'text/javascript'> alert('Server Error: Could retrieve tokens from database because of this error: ". mysqli_error($Connection)."') </script>";
}

if(mysqli_num_rows($Retrieve_Target_Tokens) > 0){
    while($Token = mysqli_fetch_array($Retrieve_Target_Tokens)){
        $tokens[] = $Token['User_Token'];
    }
}
$message = array("message" => "Your Report has been approved by an admin! Please wait for firefighter/s to arrive.");    
send_notification($tokens, $message);

function send_notification ($tokens, $message)
{
//Process of Firebase sending notification here (No problem on this function)
}

Question:

1. How can i send an array from a one page and receive it successfully to another page?

P.S. This code/s sends a push notification to specific android users only.