PHP Remote Call API 500 error resolution

PHP Remote Call API 500 error
function Getinventory ($code) {
$req = new Inventorygetrequest ();
$req-Setproductcode ($code);
$client = new Defaultsuningclient (Server_url, App_key, App_secret, FORMAT);
$resp = Execute ($req) $client;
$response = Json_decode ($resp, true) [' sn_responsecontent '];
if (Isset ($response [' Sn_error '])) {
return false;
} else {
return $response [' sn_body '] [' inventory '] [' invnum '];
}
}
Write a function to call the other side of the API remotely, when the number of records, such as about 100, run normally, record a number of words such as more than 3000 reported 500 errors

Internal Server Error

The server encountered an internal error or misconfiguration and is unable to complete your request.

Please contact the server Administrator @ [email protected] to inform them of the time this error occurred, and the Actio NS you performed just before this error.

More information on this error is available in the server error log.


Initial thinking is not the remote API response time-out, the level is limited, will not one by one troubleshooting, please be able to guide the maze.

------to solve the idea----------------------
The problem with the target site is not related to your code.

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