I have this line that finds an element in an array and gives its index.

$index = array_search($request->{'url'}, array_values($uac));

The $ uac array consists of addresses (example http://some.site/somepage.php&need=help ). The array has in itself more than 5000 elements (sometimes much more). Because of this, the script sometimes gives the error Fatal error: Out of memory. I set the memory_limit in php.ini to -1 (to do without restrictions) BUT the script continues to generate this error. As I have already read here, this is due to the fact that PHP is 32bit, not 64bit. Well, as far as I understand, in order to avoid this error, I need to split the array into parts (the array_chunk function while preserving the key), search for these individual parts, and then connect them again into one array (the array_merge function) to get the correct index. Help me please write a function for carrying out these frauds "invisible" for the script. Ie, I need an advanced array_search function that will work like the original but invisibly for the user (script) to cut the array into several arrays (let's say one hundred elements) then search and end up pasting the array in order to get the initial index. Since I have not found a ready-made solution on this site, I think this will also be useful for other people in the future.

UPD: Already have an answer that I will try. But since there is a comment about 100k elements, I’ll give the full code to help the gurus.

 <?php header('Content-Type: text/html; charset=utf-8'); error_reporting(E_ERROR | E_WARNING | E_PARSE & ~E_NOTICE); $uarray = json_decode($_POST['array']); $uac = $uarray; $res = $uarray; function request_callback($response, $info, $request) { global $uac; global $res; $index = array_search($request->{'url'}, array_values($uac)); $uac[$index] = " "; $rspnc = json_decode($response); $res[$index] = $rspnc; } require("RollingCurl.php"); $rc = new RollingCurl("request_callback"); $rc->options = array(CURLOPT_BINARYTRANSFER => true, CURLOPT_RETURNTRANSFER => true, CURLOPT_SSL_VERIFYPEER => false); $rc->window_size = 5; foreach ($uarray as $url) { $request = new RollingCurlRequest($url); $rc->add($request); } $rc->execute(); for($i = 0; $i <= count($res); $i++) { for ($j = 0; $j <= 1; $j++) { echo $res[$i]->{'name'}; echo "/"; echo $res[$i]->{'quality'}; echo "/"; echo $res[$i]->{'buy_offers'}[$j]->{'o_price'}; echo "/"; echo $res[$i]->{'buy_offers'}[$j]->{'c'}; echo "/"; echo $res[$i]->{'buy_offers'}[$j]->{'my_count'}; echo "/"; echo $res[$i]->{'classid'}. "_" .$res[$i]->{'instanceid'}; echo "<br>"; } echo "<p><p><p>"; } ?>

Well, let the number of elements in the array $ uarray 10 thousand. The code is bad, I know it myself. Give optimization tips.

  • Where does this array come from? And why is array_values ​​here? - Ipatiev
  • I do not think that it is important from where it is taken. But once you asked, it is sent using a post request to the page, and then like this json_decode ($ _ POST ['array']) ;. And array_values, as again I read on this site, they said it is necessary for the index to get the index and not the key. - el pax
  • array_values ​​creates a copy of all the values ​​in the array. those. memory goes 2 times more than if you were just looking in the array. Breaking the array apart will again create copies of the parts of the array, which again will take up more memory than 1 array. Maybe it is generally worth it to approach the task differently. In principle, there would be no need for 5k elements and never to operate with a whole array at all - Mike
  • Strange, I had 100k arrays of elements and php did not fall from memory (256MB of RAM on the virtual machine was all, how much php was allocated - I do not remember) - jekaby

1 answer 1

I have no idea why, in principle, you may need to look for an index, and not a key, but a non-memory version of the search will be

 $index = 0; foreach ($uac as $value) { if ($value == $request->{'url'}) { break; } $index++; }

But in any case, brute force search is terribly inefficient.

For the future, to find out which particular command causes an error, you should write this:

 $index = array_search( $request->{'url'}, array_values($uac) );

And then in the error message to see which of the three commands caused it.