Coroutine PHP CURL in Swoole

  1. Swoole
  2. Swoole Docs
  3. Modules
  4. Coroutine PHP CURL in Swoole

Swoole PHP CURL

PHP CURL now can be used within Swoole Coroutine, you can run multiple CURL requests concurrently within a single process within multiple coroutines.

To enable coroutine support for PHP CURL, you have to enable the Coroutine Hook for CURL:

<?php
Swoole\Runtime::enableCoroutine(SWOOLE_HOOK_CURL);

In the nutshell, PHP CURL is replaced with Coroutine HTTP Client API implementation if you have enabled SWOOLE_HOOK_CURL, otherwise you are using the original blocking PHP CURL which should not be used within the Coroutine context.

Example:

<?php

// enable coroutine support for PHP CURL
Swoole\Runtime::enableCoroutine(SWOOLE_HOOK_CURL);

Co\run(function() {

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3);
    curl_setopt($ch, CURLOPT_TIMEOUT, 10);
    $headers = array();
    $headers[] = 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36';
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    $output = curl_exec($ch);
    if ($output === FALSE) {
        echo "CURL Error:". curl_error($ch). " ". $url. "\n";
        return $resp;
    }
    curl_close($ch);
});

Check PHP Coroutine about how to execute multiple coroutines concurrently.