PHP Manual
Collator
Sort array maintaining index association

Collator::asort

collator_asort

(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)

Collator::asort -- collator_asort — Sort array maintaining index association

Description

Object-oriented style

public Collator::asort(array &$array, int $flags = Collator::SORT_REGULAR): bool

Procedural style

collator_asort(Collator $object, array &$array, int $flags = Collator::SORT_REGULAR): bool

This function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant. Array elements will have sort order according to current locale rules.

Equivalent to standard PHP asort().

Parameters

object

Collator object.

array

Array of strings to sort.

flags

Optional sorting type, one of the following:

Collator::SORT_REGULAR - compare items normally (don't change types)
Collator::SORT_NUMERIC - compare items numerically
Collator::SORT_STRING - compare items as strings

Default flags value is Collator::SORT_REGULAR. It is also used if an invalid flags value has been specified.

Return Values

Returns true on success or false on failure.

Examples

Example #1 collator_asort() example

<?php
$coll = collator_create( 'en_US' );
$arr = array(
'a' => '100',
'b' => '50',
'c' => '7'
);
collator_asort( $coll, $arr, Collator::SORT_NUMERIC );
var_export( $arr );

collator_asort( $coll, $arr, Collator::SORT_STRING );
var_export( $arr );
?>

The above example will output:

array (
  'c' => '7',
  'b' => '50',
  'a' => '100',
)array (
  'a' => '100',
  'b' => '50',
  'c' => '7',
)