3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ipaddress = $_SERVER['REMOTE_ADDR']; echo "Your IP is $ipaddress!"; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined array key "REMOTE_ADDR" in /in/qJcik on line 2 Your IP is !
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined index: REMOTE_ADDR in /in/qJcik on line 2 Your IP is !
Output for 7.3.32 - 7.3.33
Your IP is !
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
Notice: Undefined index: REMOTE_ADDR in /in/qJcik on line 2 Your IP is !

preferences:
176.78 ms | 402 KiB | 314 Q