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run code in 300+ PHP versions simultaneously
<?php $hi = [ 'hello' => 'hola', ]; if ($hi['sup'] !== false) { echo 'SUP!'; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined array key "sup" in /in/9e9bv on line 7 SUP!
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.24, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined index: sup in /in/9e9bv on line 7 SUP!
Output for 7.3.32 - 7.3.33
SUP!
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/9e9bv 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/9e9bv on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/9e9bv on line 3
Process exited with code 255.

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