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run code in 150+ php & hhvm versions
Bugs & Features
<?php  //whether ip is from share internet  if (!empty($_SERVER['HTTP_CLIENT_IP']))       {      $ip_address = $_SERVER['HTTP_CLIENT_IP'];    }  //whether ip is from proxy  elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))      {      $ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];    }  //whether ip is from remote address  else    {      $ip_address = $_SERVER['REMOTE_ADDR'];    }  echo $ip_address;  ?>  - See more at: http://www.w3resource.com/php-exercises/php-basic-exercises.php#EDITOR
based on 0rSF5
Output for 5.4.0 - 7.1.0
Notice: Use of undefined constant php   - assumed 'php  ' in /in/2A4Qd on line 1   - See more at: http://www.w3resource.com/php-exercises/php-basic-exercises.php#EDITOR
Output for 4.3.0 - 5.3.29
<?php  //whether ip is from share internet  if (!empty($_SERVER['HTTP_CLIENT_IP']))       {      $ip_address = $_SERVER['HTTP_CLIENT_IP'];    }  //whether ip is from proxy  elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))      {      $ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];    }  //whether ip is from remote address  else    {      $ip_address = $_SERVER['REMOTE_ADDR'];    }  echo $ip_address;  ?>  - See more at: http://www.w3resource.com/php-exercises/php-basic-exercises.php#EDITOR