PHP ksort() function

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PHP krsort() function
PHP extract() function

In this article, you will learn how to sort an associative array in ascending order according to the keys. The ksort() function returns an array in which the elements of the input associative array are sorted in ascending order according to their keys.

What is the syntax of the ksort() function in PHP?

ksort(array, sorttype)
ParameterDescription
arrayThe array to sort – Required
sorttypeOptional. Specifies how to compare the array elements/items. 
SORT_STRING (default) – Compare elements as strings
SORT_REGULAR – Compares normally without changing the type
SORT_NUMERIC – Compare as numeric values
SORT_LOCALE_STRING – Compare as a string according to the current locale
PHP ksort function

Examples of ksort() function

Example 1. Sort the associative array in ascending order according to keys.

<?php
$age=array("Jawad"=>"24","Ahmad"=>"25","Sumerina"=>"39");
ksort($age);
?>
PHP krsort() function
PHP extract() function

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