The cURL version.
<?php
array|false curl_version();
?>
EXERCISE
<?php
echo 'PHP version: ' . phpversion() . '<br><br>';
$curlver = curl_version();
echo '<pre>';
print_r ($curlver);
echo '</pre>';
?>
Array
(
[version_number] => 526081
[age] => 10
[features] => 1370440605
[ssl_version_number] => 0
[version] => 8.7.1
[host] => x86_64-redhat-linux-gnu
[ssl_version] => OpenSSL/1.1.1w
[libz_version] => 1.2.7
[protocols] => Array
(
[0] => dict
[1] => file
[2] => ftp
[3] => ftps
[4] => gopher
[5] => gophers
[6] => http
[7] => https
[8] => imap
[9] => imaps
[10] => mqtt
[11] => pop3
[12] => pop3s
[13] => rtsp
[14] => scp
[15] => sftp
[16] => smb
[17] => smbs
[18] => smtp
[19] => smtps
[20] => telnet
[21] => tftp
)
[ares] =>
[ares_num] => 0
[libidn] =>
[iconv_ver_num] => 0
[libssh_version] => libssh2/1.8.0
[brotli_ver_num] => 16777225
[brotli_version] => 1.0.9
)