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run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump((new \DateTime)->format(RFC3339));
Output for 7.2.0 - 7.3.0rc3
Warning: Use of undefined constant RFC3339 - assumed 'RFC3339' (this will throw an Error in a future version of PHP) in /in/c9elX on line 3 string(10) "RJulyC3339"
Output for 5.6.30, hhvm-3.18.5 - 3.21.3, 7.0.30 - 7.1.20
Notice: Use of undefined constant RFC3339 - assumed 'RFC3339' in /in/c9elX on line 3 string(10) "RJulyC3339"
Output for hhvm-3.22.0
Notice: Use of undefined constant RFC3339 - assumed 'RFC3339' in /in/c9elX on line -1 string(10) "RJulyC3339"