PHP 7.2.25 Released

ArrayObject::uasort

(PHP 5 >= 5.2.0, PHP 7)

ArrayObject::uasortSort the entries with a user-defined comparison function and maintain key association

Descrição

public ArrayObject::uasort ( callable $cmp_function ) : void

This function sorts the entries such that keys maintain their correlation with the entry that they are associated with, using a user-defined comparison function.

This is used mainly when sorting associative arrays where the actual element order is significant.

Parâmetros

cmp_function

Function cmp_function should accept two parameters which will be filled by pairs of entries. The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

Valor Retornado

Não há valor retornado.

Exemplos

Exemplo #1 ArrayObject::uasort() example

<?php
// Comparison function
function cmp($a$b) {
    if (
$a == $b) {
        return 
0;
    }
    return (
$a $b) ? -1;
}

// Array to be sorted
$array = array('a' => 4'b' => 8'c' => -1'd' => -9'e' => 2'f' => 5'g' => 3'h' => -4);
$arrayObject = new ArrayObject($array);
print_r($arrayObject);

// Sort and print the resulting array
$arrayObject->uasort('cmp');
print_r($arrayObject);
?>

O exemplo acima irá imprimir:

Array
(
    [a] => 4
    [b] => 8
    [c] => -1
    [d] => -9
    [e] => 2
    [f] => 5
    [g] => 3
    [h] => -4
)
Array
(
    [d] => -9
    [h] => -4
    [c] => -1
    [e] => 2
    [g] => 3
    [a] => 4
    [f] => 5
    [b] => 8
)

Veja Também

add a note add a note

User Contributed Notes 1 note

up
0
poxetinho at gmail dot com
8 years ago
Note that return values between (-1, 1) are being considered as 0.
To Top