Trying to diagnose an issue using PHP to cURL to an Internet location on a RedHat Linux server.
cURL is installed and working, and:
<?php var_dump(curl_version()); ?>
shows all the correct information in the output. The issue is I can use PHP to cURL to localhost on the box itself, but not the Internet (see below).
Normally I'd suspect the firewall, but I can cURL from the command line to the Internet without a problem. The box can also update it's own software packages, etc.
What am I missing? My test is:
<?php
function http_head_curl($url,$timeout=30)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$res = curl_exec($ch);
if ($res === false) {
throw new RuntimeException("cURL exception: ".curl_errno($ch).": ".curl_error($ch));
}
return trim($res);
}
// Succeeds, displaying headers
echo(http_head_curl('localhost'));
// Fails:
echo(http_head_curl('www.google.com'));
?>
