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<?php function fib($n) { return ((4 << $n*(3+$n)) / ((4 << 2*$n) - (2 << $n) - 1) & ((2 << $n) - 1)); } for ($i = 50; $i < 60; $i++) { echo "Fib {$i}: " . fib($i) . "\n"; }
Output for 7.0.0 - 7.0.33, 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 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fib 50: 0 Fib 51: 0 Fib 52: 0 Fib 53: 0 Fib 54: 0 Fib 55: 0 Fib 56: 0 Fib 57: 0 Fib 58: 0 Fib 59: 0
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 Fib 50: 0 Fib 51: 0 Fib 52: 0 Fib 53: 0 Fib 54: 0 Fib 55: 0 Fib 56: 0 Fib 57: 0 Fib 58: 0 Fib 59: 0
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fib 50: 0 Fib 51: 0 Fib 52: 0 Fib 53: 0 Fib 54: 0 Fib 55: 72057594037927935 Fib 56: 0 Fib 57: 0 Fib 58: 0 Fib 59: 0
preferences:
273.97 ms | 402 KiB | 330 Q