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<?php $tri = [1, 1]; for ($x = 0; $x <= 6; ++$x) { var_export($tri); $trinew = [1]; for($y = 0, $count = count($tri); $y < $count; ++$y) { $z = $y + 1; $trinew[] = $tri[$y] + ($tri[$z] ?? 0); } $tri = $trinew; }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
array ( 0 => 1, 1 => 1, )array ( 0 => 1, 1 => 2, 2 => 1, )array ( 0 => 1, 1 => 3, 2 => 3, 3 => 1, )array ( 0 => 1, 1 => 4, 2 => 6, 3 => 4, 4 => 1, )array ( 0 => 1, 1 => 5, 2 => 10, 3 => 10, 4 => 5, 5 => 1, )array ( 0 => 1, 1 => 6, 2 => 15, 3 => 20, 4 => 15, 5 => 6, 6 => 1, )array ( 0 => 1, 1 => 7, 2 => 21, 3 => 35, 4 => 35, 5 => 21, 6 => 7, 7 => 1, )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array ( 0 => 1, 1 => 1, )array ( 0 => 1, 1 => 2, 2 => 1, )array ( 0 => 1, 1 => 3, 2 => 3, 3 => 1, )array ( 0 => 1, 1 => 4, 2 => 6, 3 => 4, 4 => 1, )array ( 0 => 1, 1 => 5, 2 => 10, 3 => 10, 4 => 5, 5 => 1, )array ( 0 => 1, 1 => 6, 2 => 15, 3 => 20, 4 => 15, 5 => 6, 6 => 1, )array ( 0 => 1, 1 => 7, 2 => 21, 3 => 35, 4 => 35, 5 => 21, 6 => 7, 7 => 1, )
Output for 5.6.38
Parse error: syntax error, unexpected '?' in /in/ugcIo on line 8
Process exited with code 255.

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