Php foreach echo (if/else)

It prints on the screen when it is correctly entered, but I do not want to do anything when it is entered incorrectly

How can I do that?

<?php
header('Content-type: text/html; charset=utf8');

$api_key = 'local';
$keyword = 'test';

$url = 'test.json' . $api_key . '&' .'keyword' .'=' . $GLOBALS['q'] ;

$open = file_get_contents($url);
$data = json_decode($open, true);

$istatistikler = $data['data'];
if ($data) {
foreach ( $istatistikler as $istatistik ){

    echo '<div class="right">';
    echo 'Oyun modu: ' . $istatistik['title'] . '<br />' .
    'Kazanma: ' . $istatistik['content'] . '<br />' .
    'Kazanma: ' . $istatistik['image'] . '<br />' .
    'Kazanma: ' . $istatistik['category'] . '<br />' .
    '<br />' .
    '<hr/>';
 $karakter_simge = 'http://google.com' . $istatistik['image'] . '';
 echo "<img src=".$karakter_simge." >" ;
 echo '</div>';
 }
  }
?>

Successful output

Failed output

Warning: file_get_contents(http://localhost/api/detail?X-Api-Key=local&keyword=a): failed to open stream: HTTP request failed! HTTP/1.1 406 Not Acceptable in /opt/lampp/htdocs/weather-master/php/php-api.php on line 10

"I do not want to print unsuccessfully"

thank you for your help!