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<?php echo 'count(false): ',count(false),"\n"; echo 'count(0): ',count(0),"\n"; echo 'count(null): ',count(null),"\n"; echo 'count(array()): ',count(array()),"\n";
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
count(false): 1 count(0): 1 count(null): 0 count(array()): 0