<?php
$array = [1,2,3,4,5,6,7,8,9];
$expect = [1,4,7,2,5,8,3,6,9];
$a = usort($array, function ($a, $b){
$arow = 3 - $a%3;
$brow = 3 - $b%3;
$acol = intval($a/3);
$bcol = intval($b/3);
return $acol == $bcol?($arow - $brow):$acol - $bcol;
});
print_r($array);
- Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 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
- Array
(
[0] => 2
[1] => 1
[2] => 5
[3] => 4
[4] => 3
[5] => 8
[6] => 7
[7] => 6
[8] => 9
)
- 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] => 2
[1] => 1
[2] => 5
[3] => 4
[4] => 3
[5] => 8
[6] => 7
[7] => 6
[8] => 9
)
- Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected '[' in /in/tPpnK on line 3
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
- Parse error: parse error, unexpected '[' in /in/tPpnK on line 3
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/tPpnK on line 3
Process exited with code 255.
preferences:
305.97 ms | 405 KiB | 457 Q