Notice: Undefined index: phone in /var/www/html/y/sms_prepare.php on line 2

Warning: file_get_contents(): php_network_getaddresses: getaddrinfo failed: No address associated with hostname in /var/www/html/y/sms_prepare.php on line 3

Warning: file_get_contents(http://api4.verificationcode.net/order?token=b89b630264f1c931d6b24fda11ce55b61b9426feff1661009e3b25131777bbf4): failed to open stream: php_network_getaddresses: getaddrinfo failed: No address associated with hostname in /var/www/html/y/sms_prepare.php on line 3
Phone should be numeric only