bing search api php filter - php

Question

i'm using the following php to connect to bing api:
how can i add filter (Size:Small)?
the code is from bing documentation and it works fine.
i'm using this code to connect to bing and redirect the response to an iOS app.
please help...
<?php
{
$accountKey = ‘XXXXXXXXX’;
$auth = base64_encode("$accountKey:$accountKey");
$data = array(
'http' => array(
'request_fulluri' => true,
'ignore_errors' => true,
'header' => "Authorization: Basic " . $auth));
$context = stream_context_create($data);
$query = isset($_GET['q']) ? $_GET['q'] : htmlspecialchars($_GET["searchtext"]);
$serviceOp = isset($_GET['sop']) ? $_GET['sop'] : 'Web';
$market = isset($_GET['market']) ? $_GET['market'] : 'en-us';
$ServiceRootURL = 'https://api.datamarket.azure.com/Bing/Search/';
$WebSearchURL = $ServiceRootURL . 'Image?$format=json&Image.Filters=+filterui:imagesize-large+filterui:photo-photo+filterui:face-face&Query=';
$request = $WebSearchURL . urlencode( '\'' . $query. '\'') ;
// Get the response from Bing.
$response = file_get_contents($request, 0, $context);
$jsonobj = json_decode($response);
// echo('<ul ID="resultList">');
header('Content-Type: application/json');
echo($response);
?>

Answer 1

First remove all image filters from $WebSearchURL variable,
and then add your image filters with this way:
$request = $WebSearchURL . urlencode( '\'' . $query. '\'').'&ImageFilters=';
$request = $request . urlencode( '\'' .'Size:Large+Face:Face'. '\'');
Hope it works with you :)