php - Multi Curl, error handling -


i'm working multi curl , wondering how handle errors. want check error occured , if error like, rate limit exceeded want crawl link again after delay (sleep()). question: "is there build in function can me or need collect urls in array , run again?"

this i've got now:

<?php  $urls = array(  "https://api-url.com",                 "https://api-url.com",                 "https://api-url.com",                 "https://api-url.com",                 ...);  //create multiple curl handle $mh = curl_multi_init();  //number of elements in $urls $nbr = count($urls);  // set url , options for($x = 0; $x < $nbr; $x++){      // create both curl resources     $ch[$x] = curl_init();      // set url , other appropriate options     curl_setopt($ch[$x], curlopt_url, $urls[$x]);     curl_setopt($ch[$x], curlopt_returntransfer, true );     curl_setopt($ch[$x], curlopt_ssl_verifypeer, false);      //add 2 handles     curl_multi_add_handle($mh,$ch[$x]); }  //execute handles {     curl_multi_exec($mh, $running); } while ($running);  for($x = 0; $x < $nbr; $x++){     $result = curl_multi_getcontent($ch[$x]);      $decoded = json_decode($result, true);      //get info request     $error = curl_getinfo($ch[$x], curlinfo_http_code);      //error handling     if($error != 200){          $again[] = array("url" => $urls[$x], "errornbr" => $error);       } else {          // here ever want data     }      curl_multi_remove_handle($mh, $ch[$x]);     curl_close($ch[1]); }  curl_multi_close($mh); ?>

in second for-loop, when cycling through curl handlers examine did each curl handler return, hope, approach answer question

foreach ($ch $key => $h) {  //this code checking error may occur, whatever  //error can handle in if-part of condition. , save  //urls array $again call them on later stage.  if (curl_errno($h)) {  //this how complete information did happened  //curl handler. , why did fail. inforation stored in //error_info.   $again[] = array("url" =>curl_getinfo($h, curlinfo_effective_url), "error_info" => curl_getinfo($h));   } else{  //here handle success scenario each curl handler.  $responses[$key] = ['data' => curl_multi_getcontent($h)]; }  //remove curl handler doing in loop  }

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