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<?php $r = 123; printf("1 %d \n");
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught ArgumentCountError: 2 arguments are required, 1 given in /in/PrE6d:3 Stack trace: #0 /in/PrE6d(3): printf('1 %d \n') #1 {main} thrown in /in/PrE6d on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 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, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: printf(): Too few arguments in /in/PrE6d on line 3
Output for 4.3.0 - 4.3.1
Warning: printf() [http://www.php.net/function.printf]: Too few arguments in /in/PrE6d on line 3

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