3v4l.org

run code in 300+ PHP versions simultaneously
<?php $simple = ['bar' => ['x' => 'bar']]; var_dump($simple['huh']['x']);
Output for 8.0.0beta1 - beta3
Warning: Undefined array key "huh" in /in/NvG9S on line 4 Warning: Trying to access array offset on value of type null in /in/NvG9S on line 4 NULL
Output for 8.0.0alpha3
Notice: Undefined array key "huh" in /in/NvG9S on line 4 Warning: Trying to access array offset on value of type null in /in/NvG9S on line 4 NULL
Output for 8.0.0alpha1 - alpha2
Notice: Undefined index: huh in /in/NvG9S on line 4 Warning: Trying to access array offset on value of type null in /in/NvG9S on line 4 NULL
Output for 7.4.0 - 7.4.10
Notice: Undefined index: huh in /in/NvG9S on line 4 Notice: Trying to access array offset on value of type null in /in/NvG9S on line 4 NULL
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.21
Notice: Undefined index: huh in /in/NvG9S on line 4 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/NvG9S on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/NvG9S on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/NvG9S on line 3
Process exited with code 255.