asort

Name:asort

Category:Array

Programming Language:php

One-line Description:Sort associative arrays by key values.

Definition and usage

asort() function sorts the associative arrays according to key values.

Tip: Please use the arsort() function to sort the associative arrays in descending order by key values.

Tip: Please use the ksort() function to sort the associative arrays according to the key names.

Example

Sort the associative array by key value:

 <?php
$age = array ( "Bill" => "60" , "Steve" => "56" , "Mark" => "31" ) ;
asort ( $age ) ;
?>

Try it yourself

grammar

 asort ( array , sortingtype ) ;

parameter	describe
array	Required. Specifies the array to be sorted.
sortingtype	Optional. Specifies how to arrange elements/items of an array. Possible values: 0 = SORT_REGULAR - Default. Arrange each item in a regular order (Standard ASCII, without changing the type) 1 = SORT_NUMERIC - Treat each item as a number 2 = SORT_STRING - Handle each item as a string 3 = SORT_LOCALE_STRING - Handle each item as a string, based on the current locale setting (can be changed through setlocale()) 4 = SORT_NATURAL - Handle each item as a string, using a natural sort like natsort() 5 = SORT_FLAG_CASE - Strings can be sorted in combination with (bit-by-bit or) SORT_STRING or SORT_NATURAL, case-insensitive

parameter

describe

array

Required. Specifies the array to be sorted.

sortingtype

Optional. Specifies how to arrange elements/items of an array. Possible values:

0 = SORT_REGULAR - Default. Arrange each item in a regular order (Standard ASCII, without changing the type)
1 = SORT_NUMERIC - Treat each item as a number
2 = SORT_STRING - Handle each item as a string
3 = SORT_LOCALE_STRING - Handle each item as a string, based on the current locale setting (can be changed through setlocale())
4 = SORT_NATURAL - Handle each item as a string, using a natural sort like natsort()
5 = SORT_FLAG_CASE - Strings can be sorted in combination with (bit-by-bit or) SORT_STRING or SORT_NATURAL, case-insensitive

illustrate

asort() function sorts the array and maintains the index relationship. It is mainly used to sort those combined arrays whose unit order is important.

The optional second parameter contains the additional sorting identifier.

Return TRUE if successful, otherwise return FALSE.