How to perform a cURL request using a specific network interface in PHP?

To perform a cURL request using a specific network interface in PHP, you can use the CURLOPT_INTERFACE option provided by cURL.

Here's an example code snippet:

$ch = curl_init();

// Set the URL you want to request
curl_setopt($ch, CURLOPT_URL, 'https://example.com');

// Set the network interface you want to use (replace with your desired interface name)
curl_setopt($ch, CURLOPT_INTERFACE, 'eth0');

// Execute the request and fetch the response
$response = curl_exec($ch);

// Check for any errors
if(curl_errno($ch)){
    echo 'cURL error: ' . curl_error($ch);
}

// Close the cURL session
curl_close($ch);

In the above code, curl_setopt() is used to set the options for the cURL request. The CURLOPT_INTERFACE option is set to the name of the network interface you want to use (eth0 in this example).

Note: You need to have the necessary privileges or run the PHP script as a user with sufficient privileges to access and use a specific network interface.