Can somebody help me to solve this problem ! When I try to access data from a web service using curl json, I got this error !

• mcrypt_encrypt(): Key of size 51 not supported by this algorithm. Only keys of sizes 16, 24 or 32 supported -

To solve this error, what should I do ! Didn't work php artisan key:generate

this is my code snippet I used to retrieve data !

• public function getallItems() { $url = "http://localhost/WebService/public/category/getcategories"; $ch = curl_init(); curl_setopt($ch,CURLOPT_URL, $url); //curl_setopt ($ch, CURLOPT_RETURNTRANSFER,1); curl_setopt($ch,CURLOPT_TIMEOUT,3); $response = curl_exec($ch); curl_close($ch); echo $response;

  }