<?php
function createMultiKeyCmpFunc($cmp, $key /* , keys... */) {
$keys = func_get_args();
array_shift($keys);
return function (array $a, array $b) use ($cmp, $keys) {
return array_reduce($keys, function ($result, $key) use ($cmp, $a, $b) {
return $result ?: call_user_func($cmp, $a[$key], $b[$key]);
});
};
}
$array = [
['foo' => 4, 'bar' => 2, 'baz' => 3],
['foo' => 4, 'bar' => 3, 'baz' => 3],
['foo' => 3, 'bar' => 2, 'baz' => 3],
['foo' => 4, 'bar' => 1, 'baz' => 6],
['foo' => 3, 'bar' => 2, 'baz' => 3],
['foo' => 1, 'bar' => 4, 'baz' => 3],
['foo' => 2, 'bar' => 2, 'baz' => 1],
['foo' => 6, 'bar' => 6, 'baz' => 8],
['foo' => 6, 'bar' => 2, 'baz' => 3],
['foo' => 3, 'bar' => 1, 'baz' => 5],
['foo' => 4, 'bar' => 2, 'baz' => 3],
];
usort($array, createMultiKeyCmpFunc('strcmp', 'foo', 'bar', 'baz'));
var_dump($array);
- Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.3.6
- array(11) {
[0]=>
array(3) {
["foo"]=>
int(1)
["bar"]=>
int(4)
["baz"]=>
int(3)
}
[1]=>
array(3) {
["foo"]=>
int(2)
["bar"]=>
int(2)
["baz"]=>
int(1)
}
[2]=>
array(3) {
["foo"]=>
int(3)
["bar"]=>
int(1)
["baz"]=>
int(5)
}
[3]=>
array(3) {
["foo"]=>
int(3)
["bar"]=>
int(2)
["baz"]=>
int(3)
}
[4]=>
array(3) {
["foo"]=>
int(3)
["bar"]=>
int(2)
["baz"]=>
int(3)
}
[5]=>
array(3) {
["foo"]=>
int(4)
["bar"]=>
int(1)
["baz"]=>
int(6)
}
[6]=>
array(3) {
["foo"]=>
int(4)
["bar"]=>
int(2)
["baz"]=>
int(3)
}
[7]=>
array(3) {
["foo"]=>
int(4)
["bar"]=>
int(2)
["baz"]=>
int(3)
}
[8]=>
array(3) {
["foo"]=>
int(4)
["bar"]=>
int(3)
["baz"]=>
int(3)
}
[9]=>
array(3) {
["foo"]=>
int(6)
["bar"]=>
int(2)
["baz"]=>
int(3)
}
[10]=>
array(3) {
["foo"]=>
int(6)
["bar"]=>
int(6)
["baz"]=>
int(8)
}
}
- Output for 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected '[' in /in/rRFJ9 on line 14
Process exited with code 255. - Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
- Parse error: syntax error, unexpected T_FUNCTION in /in/rRFJ9 on line 7
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 T_FUNCTION in /in/rRFJ9 on line 7
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/rRFJ9 on line 7
Process exited with code 255.
preferences:
247.77 ms | 401 KiB | 328 Q