GET Requests how to get a single user's message?

Question

PHP

there is a message of users who go post method

<table class="table w-100" border="1">
    <thead class="thead-dark">
      <th>Sender Name</th>
      <th>Message</th>
      <th>Has been sent</th>
      <!--  			<th>Time</th> -->
    </thead>
    <?php foreach($mass as $item){ ?>
      <?php 
      $d = date_default_timezone_set("Asia/Yerevan"); 
 		$data = date("Y-m-d H:i:s"); //tvyal jamy
 		$data_obj = new DateTime($data); //tvyal jamy sargum en data obiekt
 		$str = $item["data_time"]; //uxarkvac namakneri jamayin tvyalner
 		$sended = new DateTime($str); //stanum enq uxarkvac namakneri datai obiekty
 		$interval = $data_obj ->diff($sended); //nranc tarberutyuny
 		$days = $interval->d;
 		$hours = $interval->h;
 		$minutes = $interval->i;
 		?>
 		<?php if($_SERVER["REQUEST_METHOD"] == "GET" && $_GET["name"] == $item["name"]){ ?>
 			<tbody>
 				<th><?=$item['name']?></th>
 				<th><?=$item['message']?></th>
 				<th><?="Sended ".$days." Days ".$hours." Hours ".$minutes." Minutes ago "?></th>
 			</tbody>
 		<?php } ?>
 			<tbody>
 				<th><?=$item['name']?></th>
 				<th><?=$item['message']?></th>
 				<th><?="Sended ".$days." Days ".$hours." Hours ".$minutes." Minutes ago "?></th>
 			</tbody>
 	<?php } ?>
 </table>

how to enter in the address bar for example admin.php?name=x and get the message of one user