json

<?
$id = $_SERVER['QUERY_STRING']; //$_GET[id];
$json =  '[
  {"title":"trench", "img":"https://i.imgur.com/HoPQJqI.jpg"},
  {"title":"coat"}
  ]';
 $mydata = json_decode($json);
 foreach ($mydata as $v):
    if ($v->title == $id) {
     $item = $v->title; 
    break;
 }
 endforeach;

  echo $item ? "<h2>$item</h2>" : '404';
?>