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run code in 150+ php & hhvm versions
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<?php function x($a = 1) { var_dump(func_num_args()); } x(); x(1); x(1,2); x(1,2,3,4); x(1,2,3,4,5);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
int(0) int(1) int(2) int(4) int(5)