PHP 컬_setopt 함수의 용도는 무엇입니까?

bool curl_setopt ( resource $ch , int $option , mixed $value )

<?php
// 创建一个新cURL资源
$ch = curl_init();
// 设置URL和相应的选项
curl_setopt($ch, CURLOPT_URL, "http://www.example.com/");
curl_setopt($ch, CURLOPT_HEADER, false);
// 抓取URL并把它传递给浏览器
curl_exec($ch);
//关闭cURL资源，并且释放系统资源
curl_close($ch);
?>

<?php
/* http://localhost/upload.php:
print_r($_POST);
print_r($_FILES);
*/
$ch = curl_init();
$data = array(&#39;name&#39; => &#39;Foo&#39;, &#39;file&#39; => &#39;@/home/user/test.png&#39;);
curl_setopt($ch, CURLOPT_URL, &#39;http://localhost/upload.php&#39;);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_exec($ch);
?>

Array
(
    [name] => Foo
)
Array
(
    [file] => Array
        (
            [name] => test.png
            [type] => image/png
            [tmp_name] => /tmp/phpcpjNeQ
            [error] => 0
            [size] => 279
        )
)