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<?php $d1 = new DateTime("2009-09-01"); $d2 = new DateTime("2010-05-01"); pr($d1->diff($d2)); pr($d1->diff($d2)->y); // int(4)
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function pr() in /in/YRAIg:8 Stack trace: #0 {main} thrown in /in/YRAIg on line 8
Process exited with code 255.

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