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run code in 150+ php & hhvm versions
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<?php function args($arg = null) { print_r(func_get_args()); print "ARGS=".func_num_args()."\n"; } args();
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( ) ARGS=0