$long_url = urlencode('https://bit.ly/3tCEsz7');
$api_token = '8824dfdd14184ec484a5ffd24263e9d5a6887fe4';
$api_url = "https://clk.sh/api?api= {$api_token} &url= {$long_url} &alias= CustomAlias ​​";
$result = @json_decode(file_get_contents($api_url),TRUE);
if($result["status"] === 'error') {
 echo $result["message"];
} Else {
 echo $result["shortenedUrl"];
}