php array_slice无法找到数组

Question

Im getting some data trough someone elses script that forms an array I want to slice because there is a lot of old data in there and I only need the latest newest data.

Im creating an array from xml like this:

    $result = (object)$SOAP->Export($token, $exportCmd, $admin);

    if($result->response->code != APIResponse::Success)
      die("Failed to Export");

    $exportedXML = $result->exportResult;

    $xml = trim(str_replace("Content-type: text/xml", " ", $exportedXML));

    $xml = simplexml_load_string($xml);

    $json = json_encode($xml);

    $response = json_decode($json,TRUE);

If I print the response I get something like this:

Array ( 
[R2420] => Array ( 
[0] => Array ( [F2400] => 00200002 [F2425] => 01 [F2426] => 050 ) 
[1] => Array ( [F2001] => text [F2400] => 00200002 [F2425] => 00 [F2426] => 060 ) 
[2] => Array ( [F2001] => text [F2400] => 00200008 [F2425] => 01 [F2426] => 080 ) 
[3] => Array ( [F2001] => text [F2400] => 00200008 [F2425] => 02 [F2426] => 080 ) 
[4] => Array ( [F2001] => text [F2400] => 00200026 [F2425] => 00 [F2426] => 150 ) 
[5] => Array ( [F2400] => 00200038 [F2425] => 01 [F2426] => 330 )
)
)

This one goes to 5, the actual one till about 2000. I want for example only the last 200. But when I use $output = array_slice($response, -200, 200); It wont slice anything off, I think thats because its an array in an array, but how do I slice that?

Thanks!

Answer 1

You could just

$output = array_slice($response[0], -200, 200);

If you were sure that it was the first element in the array you wanted.

Just make sure to wrap it in a check that $response[0] exists.

$output = false;
if (!empty($response[0]))
    $output = array_slice($response[0], -200, 200);