Is there a limit with placeOrder using PHP?

[Baby Jesus]

Come across some annoying quirk where the API isn't letting me send more than 6 bets in a single request for some unknown reason. I'm using PHP and tweaked the sample code off the site. Can anyone think of a reason why the requests with over 6 bets are being rejected, unfortunately the API is only giving a response of null from the sample php code.

I'm just using the code below to submit the bets.

$jsonResponse = sportsApingRequest($appKey,$sessionToken, 'placeOrders/', $params);

$params of

{"marketId":"1.121637352","instructions":[{"selectionId":10343384,"handicap":"0","side":"LAY ","orderType":"LIMIT","limitOrder":{"size":"50","p rice":"2","persistenceType":"MARKET_ON_CLOSE"}},{" selectionId":10485442,"handicap":"0","side":"LAY", "orderType":"LIMIT","limitOrder":{"size":"50","pri ce":"2","persistenceType":"MARKET_ON_CLOSE"}},{"se lectionId":6163562,"handicap":"0","side":"LAY","or derType":"LIMIT","limitOrder":{"size":"50","price" :"2","persistenceType":"MARKET_ON_CLOSE"}},{"selec tionId":10485441,"handicap":"0","side":"LAY","orde rType":"LIMIT","limitOrder":{"size":"50","price":" 2","persistenceType":"MARKET_ON_CLOSE"}},{"selecti onId":10351841,"handicap":"0","side":"LAY","orderT ype":"LIMIT","limitOrder":{"size":"50","price":"2" ,"persistenceType":"MARKET_ON_CLOSE"}},{"selection Id":10277121,"handicap":"0","side":"LAY","orderTyp e":"LIMIT","limitOrder":{"size":"50","price":"2"," persistenceType":"MARKET_ON_CLOSE"}}]}

Will happily go thru , whereas the following just gives a response as Call to api-ng failed: Response: null

{"marketId":"1.121637352","instructions":[{"selectionId":10343384,"handicap":"0","side":"LAY ","orderType":"LIMIT","limitOrder":{"size":"50","p rice":"2","persistenceType":"MARKET_ON_CLOSE"}},{" selectionId":10485442,"handicap":"0","side":"LAY", "orderType":"LIMIT","limitOrder":{"size":"50","pri ce":"2","persistenceType":"MARKET_ON_CLOSE"}},{"se lectionId":6163562,"handicap":"0","side":"LAY","or derType":"LIMIT","limitOrder":{"size":"50","price" :"2","persistenceType":"MARKET_ON_CLOSE"}},{"selec tionId":10485441,"handicap":"0","side":"LAY","orde rType":"LIMIT","limitOrder":{"size":"50","price":" 2","persistenceType":"MARKET_ON_CLOSE"}},{"selecti onId":10351841,"handicap":"0","side":"LAY","orderT ype":"LIMIT","limitOrder":{"size":"50","price":"2" ,"persistenceType":"MARKET_ON_CLOSE"}},{"selection Id":10277121,"handicap":"0","side":"LAY","orderTyp e":"LIMIT","limitOrder":{"size":"50","price":"2"," persistenceType":"MARKET_ON_CLOSE"}},{"selectionId ":10485440,"handicap":"0","side":"LAY","orderType" :"LIMIT","limitOrder":{"size":"50","price":"2","pe rsistenceType":"MARKET_ON_CLOSE"}}]}

Got me stumped so any help or workarounds in php would be appreciated, thanks.

[Baby Jesus]

Guess there aren't many php users or any come across the same problem

I've sorted the limitation for now just by using array_chunk to split the array into chunks of six and place the orders like that. Works fine so it'll have to do for now.

$data=array_chunk($instructions, 6);

foreach($data as $instructions){

$params = new stdClass;
$params->marketId = $marketId;
$params->instructions = $instructions;

$params=json_encode($params);

$jsonResponse = sportsApingRequest($appKey,$sessionToken, 'placeOrders/', $params);  

} 

[Fred77]

The sample code is just a sample, you need to pad it out with more error detection and handling, as there's definitely something other than "null" going on.

It's probably caused by this http://forum.bdp.betfair.com/showthread.php?t=2900

Curl's default behaviour is to use Expect:100-continue when the posted data is over a certain size, hence your problem.

If so then it's an easy fix

    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Expect:', // disable Expect:100-continue behaviour
        'X-Application: ' . $appKey,
        'X-Authentication: ' . $sessionToken,
        'Accept: application/json',
        'Content-Type: application/json'
    )); 

[Baby Jesus]

Thanks Fred, that's sorted it out.