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run code in 300+ PHP versions simultaneously
<?php $x = new stdClass; $x->{'dupa.xx'} = 3; var_dump($x);
Output for 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, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.29 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
object(stdClass)#1 (1) { ["dupa.xx"]=> int(3) }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
object(stdClass)(1) { ["dupa.xx"]=> int(3) }

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214.58 ms | 402 KiB | 345 Q