How Can Parallel Curl Requests Optimize PHP Processing Speed?

PHP Parallel Curl Requests: Optimizing Processing Speed

When dealing with multiple web requests that require processing server-side, it is essential to maximize efficiency. While using file_get_contents() can fulfill this task, it can significantly slow down the process due to its sequential nature.

A more optimized approach is to utilize parallel curl requests. By implementing multi-curl, you can simultaneously handle multiple requests, reducing the wait time associated with serial requests. Consider the following code snippet:

$nodes = array($url1, $url2, $url3);
$node_count = count($nodes);

$curl_arr = array();
$master = curl_multi_init();

for($i = 0; $i < $node_count; $i++)
{
    $url =$nodes[$i];
    $curl_arr[$i] = curl_init($url);
    curl_setopt($curl_arr[$i], CURLOPT_RETURNTRANSFER, true);
    curl_multi_add_handle($master, $curl_arr[$i]);
}

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

for($i = 0; $i < $node_count; $i++)
{
    $results[] = curl_multi_getcontent($curl_arr[$i]);
}
print_r($results);

This script initiates multiple curl handles and adds them to a master curl multi-handle. The curl_multi_exec() function is then used to execute these handles simultaneously. Finally, the results are retrieved and printed.

By employing parallel curl requests, you can significantly improve the speed of your server-side processing, enabling your app to handle numerous web requests efficiently.

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