What are the potential pitfalls of using curl_multi_init for executing multiple curl requests in a PHP script?

One potential pitfall of using curl_multi_init for executing multiple curl requests in a PHP script is that it can be complex to manage and debug, especially for beginners. To solve this issue, you can encapsulate the curl_multi_init functionality in a helper function or class to abstract away the complexity and make it easier to use. 

<?php
function multiCurlRequests($urls) {
    $mh = curl_multi_init();
    $ch = [];
    foreach ($urls as $url) {
        $ch[$url] = curl_init($url);
        curl_setopt($ch[$url], CURLOPT_RETURNTRANSFER, true);
        curl_multi_add_handle($mh, $ch[$url]);
    }

    $running = null;
    do {
        curl_multi_exec($mh, $running);
    } while ($running > 0);

    $responses = [];
    foreach ($urls as $url) {
        $responses[$url] = curl_multi_getcontent($ch[$url]);
        curl_multi_remove_handle($mh, $ch[$url]);
        curl_close($ch[$url]);
    }

    curl_multi_close($mh);

    return $responses;
}

$urls = ["http://example.com", "http://example.org"];
$responses = multiCurlRequests($urls);

var_dump($responses);
?>

Keywords

curl_multi_init PHP script multiple requests potential pitfalls error types

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