3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo 'HTTP_CLIENT_IP'.$_SERVER['HTTP_CLIENT_IP']; echo 'HTTP_X_FORWARDED_FOR'.$_SERVER['HTTP_X_FORWARDED_FOR']; echo 'REMOTE_ADDR'.$_SERVER['REMOTE_ADDR']; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined array key "HTTP_CLIENT_IP" in /in/jJ0G7 on line 2 HTTP_CLIENT_IP Warning: Undefined array key "HTTP_X_FORWARDED_FOR" in /in/jJ0G7 on line 3 HTTP_X_FORWARDED_FOR Warning: Undefined array key "REMOTE_ADDR" in /in/jJ0G7 on line 4 REMOTE_ADDR
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.29 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined index: HTTP_CLIENT_IP in /in/jJ0G7 on line 2 HTTP_CLIENT_IP Notice: Undefined index: HTTP_X_FORWARDED_FOR in /in/jJ0G7 on line 3 HTTP_X_FORWARDED_FOR Notice: Undefined index: REMOTE_ADDR in /in/jJ0G7 on line 4 REMOTE_ADDR
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 7.3.32 - 7.3.33, 7.4.26
HTTP_CLIENT_IPHTTP_X_FORWARDED_FORREMOTE_ADDR

preferences:
245.27 ms | 403 KiB | 341 Q