PHP Decode

<?php 
$baseParams=['token'=>'8932dd0b76965df4723bb862cc00ec2d1f79282d','useWebSuppliers'=>1,'customerID'=>308,'useAnalogs'=>1];$logFile='api_requests.log';function log_message($message){global $logFile;$timestamp=date('Y-m-d H:i:s');file_put_contents($logFile,$timestamp.' - '.$message.PHP_EOL,FILE_APPEND);} 
$rawPostData=file_get_contents('php://input');$items=json_decode($rawPostData,true);$results=[];$concurrentRequests=2;$pauseBetweenBatches=3; 
if(isset($items)&&is_array($items)){$chunks=array_chunk($items,$concurrentRequests); 
foreach($chunks as $chunk){$mh=curl_multi_init();$curlHandles=[]; 
foreach($chunk as $item){$itemId=$item['id'];$retries=3;$success=false;$ch=curl_init(); 
$params=$baseParams+['brand'=>$item['brand'],'code'=>$item['oem']];$url='https://www.avto-zakup.ru/api/v1/search/?'.http_build_query($params); 
curl_setopt($ch,CURLOPT_URL,$url);curl_setopt($ch,CURLOPT_RETURNTRANSFER,true); 
curl_multi_add_handle($mh,$ch);$curlHandles[$itemId]=[$ch,$retries,&$success];} 
do{$status=curl_multi_exec($mh,$running);curl_multi_select($mh);}while($running>0&&$status===CURLM_OK); 
foreach($chunk as $item){$itemId=$item['id'];$ch=$curlHandles[$itemId][0];$retries=&$curlHandles[$itemId][1];$success=&$curlHandles[$itemId][2]; 
$httpCode=curl_getinfo($ch,CURLINFO_HTTP_CODE);$response=curl_multi_getcontent($ch); 
if($httpCode>=200&&$httpCode<300){$results[$itemId]=json_decode($response,true);$success=true;log_message("   ID: $itemId.  : $httpCode"); 
}else{$retries--;log_message("  ID: $itemId.  : $httpCode.   ".(3-$retries).".  : $retries"); 
if($retries>0){sleep(3);curl_multi_remove_handle($mh,$ch);curl_multi_add_handle($mh,$ch); 
do{$status=curl_multi_exec($mh,$running);curl_multi_select($mh);}while($running>0&&$status===CURLM_OK); 
$httpCode=curl_getinfo($ch,CURLINFO_HTTP_CODE);$response=curl_multi_getcontent($ch); 
if($httpCode>=200&&$httpCode<300){$results[$itemId]=json_decode($response,true);$success=true; 
log_message("   ID: $itemId.  : $httpCode");}}} 
curl_multi_remove_handle($mh,$ch);curl_close($ch);if(!$success){$results[$itemId]=":     ";}} 
curl_multi_close($mh);log_message("   : $pauseBetweenBatches ");sleep($pauseBetweenBatches);} 
header('Content-Type: application/json');echo json_encode($results);}else{log_message(": \$items         JSON."); 
echo": \$items         JSON.   POST.
";var_dump($rawPostData);} 
?>