<?php
function getWebPage(){
    $url = 'https://api.hitbox.tv/media/status/creativescapersps';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_URL,$url);
    $result = curl_exec($ch);
    curl_close($ch);
    $result = json_decode($result, true);
    if($result['media_is_live'] == 1){
        return $result;
        //you could display the amount of viewers with $result['media_views'] if you want to
    }else{
        return false;
    }
}
?>

<?php if(getWebPage() == false): ?>
    <img src="offline.jpg">
<?php else: ?>
    <img src="online.jpg">
<?php endif;?>