title: CURLOPT_INTERFACE not working in php
body: <p>I am not able to bind to my ip addresses that are set in my network interface</p>
  
  <p>The following command works
      curl --interface 41.141.41.23 <a href="https://www.google.com" rel="nofollow">https://www.google.com</a></p>
  
  <p>but <code>$toSet[CURLOPT_INTERFACE] = "41.141.41.23 ";</code> in php doesn't work and throw <code>bind failed with errno 22: Invalid argument</code></p>
  
  <p>I am sure that <code>$toSet[CURLOPT_INTERFACE] = "41.141.41.23 ";</code> is the correct way to use multiple address in my application as i have confirm with the coder and many people are using it the same way as well without any issue</p>
  
  <p>My curl version is : curl 7.19.7 </p>