How to reduce virtual memory by optimizing my PHP code?

Question

My current code (see below) uses 147 MB ​​of virtual memory! My provider allocated 100 MB by default, and the process was killed after starting, which caused an internal error. The code uses curl multi and should be able to loop with more than 150 iterations while minimizing virtual memory. The code below is set to only 150 iterations and still causes an internal server error. At 90 iterations, the problem does not arise.

How to configure my code to reduce resource / virtual memory usage?

Thank!

<?php

    function udate($format, $utimestamp = null) {
      if ($utimestamp === null)
        $utimestamp = microtime(true);
      $timestamp = floor($utimestamp);
      $milliseconds = round(($utimestamp - $timestamp) * 1000);
      return date(preg_replace('`(?<!\\\\)u`', $milliseconds, $format), $timestamp);
    }

$url = 'https://www.testdomain.com/';
$curl_arr = array();
$master = curl_multi_init();

for($i=0; $i<150; $i++)
{
    $curl_arr[$i] = curl_init();
    curl_setopt($curl_arr[$i], CURLOPT_URL, $url);
    curl_setopt($curl_arr[$i], CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl_arr[$i], CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($curl_arr[$i], CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_multi_add_handle($master, $curl_arr[$i]);
}

do {
    curl_multi_exec($master,$running);
} while($running > 0);

for($i=0; $i<150; $i++)
{
    $results = curl_multi_getcontent ($curl_arr[$i]);
    $results = explode("<br>", $results);
      echo $results[0];
      echo "<br>";
      echo $results[1];
      echo "<br>";
      echo udate('H:i:s:u');
      echo "<br><br>";
      usleep(100000);
}

?>

Answer 1

According to your last comment ..

Download RollingCurl.php.

, API.

<?php

$url = '________';
$fetch_count = 150;
$window_size = 5;


require("RollingCurl.php");

function request_callback($response, $info, $request) {
    list($result0, $result1) = explode("<br>", $response);
    echo "{$result0}<br>{$result1}<br>";
    //print_r($info);
    //print_r($request);
    echo "<hr>";
}


$urls = array_fill(0, $fetch_count, $url);

$rc = new RollingCurl("request_callback");
$rc->window_size = $window_size;
foreach ($urls as $url) {
    $request = new RollingCurlRequest($url);
    $rc->add($request);
}
$rc->execute();

?>

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https://stackoverflow.com/users/516277/icer

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Answer 2

150 PHP, . , 150 . URL- .

, CURLOPT_RETURNTRANSFER 0 CURLOPT_WRITEFUNCTION, PHP :

http://www.php.net/manual/en/function.curl-setopt.php#98491

function on_curl_write($ch, $data)
{
  global $fh;
  $bytes = fwrite ($fh, $data, strlen($data));
  return $bytes;
}

curl_setopt ($curl_arr[$i], CURLOPT_WRITEFUNCTION, 'on_curl_write');

.

Answer 3

<?php

echo str_repeat(' ', 1024); //to make flush work

$url = 'http://__________/';
$fetch_count = 15;
$delay = 100000; //0.1 second
//$delay = 1000000; //1 second


$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);


for ($i=0; $i<$fetch_count; $i++) {

    $start = microtime(true);

    $result = curl_exec($ch);

    list($result0, $result1) = explode("<br>", $result);
    echo "{$result0}<br>{$result1}<br>";
    flush();

    $end = microtime(true);

    $sleeping = $delay - ($end - $start);
    echo 'sleeping: ' . ($sleeping / 1000000) . ' seconds<hr />';
    usleep($sleeping);

}

curl_close($ch);

?>