How to use php asort function

php The asort function is used to sort an associative array in ascending order by key value. Its syntax is asort(array, sortingtype). The parameter array is required and refers to the array to be sorted.

#php asort function how to use?

Definition and usage

asort() function sorts the associative array in ascending order by key value.

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

Tip: Please use the ksort() function to sort the associative array in ascending order by key name.

Syntax

asort(array,sortingtype);

Parameters

array Required, specifies the array to be sorted.

sortingtype is optional and specifies how to arrange the elements/items of the array. Possible values:

0 = SORT_REGULAR - Default. Put each item in regular order (Standard ASCII, no change of type)

1 = SORT_NUMERIC - Treat each item as a number

2 = SORT_STRING - Treat each item as a character

3 = SORT_LOCALE_STRING - Treat each item as a string, based on the current locale (can be changed via setlocale())

4 = SORT_NATURAL - Treat each item as a string Processed as strings, using natural sorting like natsort()

5 = SORT_FLAG_CASE - Can be combined (bitwise OR) with SORT_STRING or SORT_NATURAL to sort strings, case-insensitive

Description

asort() function sorts the array and maintains the index relationship. Mainly used for sorting associative arrays where the order of cells is important.

The optional second parameter contains additional sorting identifiers.

Returns TRUE if successful, otherwise returns FALSE.

Return value: TRUE if successful, FALSE if failed.

PHP Version: 4

Example

Sort the associative array in ascending order by key value:

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

Output:

Key=Mark, Value=31
Key=Steve, Value=56
Key=Bill, Value=60

The above is the detailed content of How to use php asort function. For more information, please follow other related articles on the PHP Chinese website!