Why Does My cURL Request Fail with Error 7: \'Couldn\'t Connect to Host\'?

Resolving cURL Error (7): Unable to Establish Host Connection

When sending an XML item code to a web service using cURL, you may encounter the error "cURL Error (7): couldn't connect to host." This can occur in a server environment but return a successful response locally.

The culprit behind this error is typically an inability to establish a connection to the host. cURL error code 7 (CURLE_COULDNT_CONNECT) indicates a failed connection to the host or proxy.

To resolve this issue, verify that the provided URL is correct and that it is accessible from the server. Additionally, check for any firewall or network restrictions that may be blocking the connection.

Solution:

The solution provided in the question answer suggests using a simple code to test the connection:

$ch = curl_init("http://google.com");    // initialize curl handle
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
$data = curl_exec($ch);
print($data);

If this code fails to display the Google page, it confirms that your URL is incorrect or that you have firewall or restriction issues. By addressing these potential problems, you can resolve the cURL error and establish a successful connection to your desired host.

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