ArrayObject::uasortArrayObject::uksort
(PHP 5 >= 5.2.0)
ArrayObject::uksort — Sort the entries by keys using a user-defined comparison function
Descripción
This function sorts the keys of the entries using a user-supplied comparison function. The key to entry correlations will be maintained.
Parámetros
- cmp_function
-
The callback comparison function.
Function cmp_function should accept two parameters which will be filled by pairs of entry keys. 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.
Valores devueltos
No devuelve ningún valor.
Ejemplos
Example #1 ArrayObject::uksort() example
<?php
function cmp($a, $b) {
$a = preg_replace('@^(a|an|the) @', '', $a);
$b = preg_replace('@^(a|an|the) @', '', $b);
return strcasecmp($a, $b);
}
$array = array("John" => 1, "the Earth" => 2, "an apple" => 3, "a banana" => 4);
$arrayObject = new ArrayObject($array);
$arrayObject->uksort('cmp');
foreach ($arrayObject as $key => $value) {
echo "$key: $value\n";
}
?>
El resultado del ejemplo sería:
an apple: 3 a banana: 4 the Earth: 2 John: 1
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ArrayObject::uksort
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