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<?php $date = new DateTime(); echo $date->format('Y-m-d'); $date->add('P1M'); echo $date->format('Y-m-d');
Output for git.master, git.master_jit, rfc.property-hooks
2014-03-10 Fatal error: Uncaught TypeError: DateTime::add(): Argument #1 ($interval) must be of type DateInterval, string given in /in/Gt3cD:5 Stack trace: #0 /in/Gt3cD(5): DateTime->add('P1M') #1 {main} thrown in /in/Gt3cD on line 5
Process exited with code 255.

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