(PHP 5 >= 5.2.0, PHP 7)

ArrayObject::ksortSort the entries by key


public ArrayObject::ksort ( int $flags = SORT_REGULAR ) : void

Sorts the entries by key, maintaining key to entry correlations. This is useful mainly for associative arrays.



The optional second parameter flags may be used to modify the sorting behavior using these values:

Sorting type flags:

  • SORT_REGULAR - compare items normally; the details are described in the comparison operators section
  • SORT_NUMERIC - compare items numerically
  • SORT_STRING - compare items as strings
  • SORT_LOCALE_STRING - compare items as strings, based on the current locale. It uses the locale, which can be changed using setlocale()
  • SORT_NATURAL - compare items as strings using "natural ordering" like natsort()
  • SORT_FLAG_CASE - can be combined (bitwise OR) with SORT_STRING or SORT_NATURAL to sort strings case-insensitively


Es wird kein Wert zur├╝ckgegeben.


Beispiel #1 ArrayObject::ksort() example

= array("d" => "lemon""a" => "orange""b" => "banana""c" => "apple");
$fruitArrayObject = new ArrayObject($fruits);

foreach (
$fruitArrayObject as $key => $val) {
"$key = $val\n";

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

a = orange
b = banana
c = apple
d = lemon

Siehe auch

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