ksort

PHP 4, PHP 5, PHP 7, PHP 8
ksort - Sort an array by key in ascending order
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ksort( arrayarray, [int$flags = SORT_REGULAR] ): bool

Sorts array in place by keys in ascending order.

Note:

If two members compare as equal, they retain their original order. Prior to PHP 8.0.0, their relative order in the sorted array was undefined.

Note:

Resets array's internal pointer to the first element.

Parameters

array

The input array.

flags

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

Return Values

Always returns true.

Related Functions

Example of ksort

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