ArrayIterator::ksort
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
ArrayIterator::ksort — Sort entries by keys
Description
public ArrayIterator::ksort(int
$flags = SORT_REGULAR): boolSorts entries by their keys.
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.
Parameters
-
flags -
The optional second parameter
flagsmay 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) withSORT_STRINGorSORT_NATURALto sort strings case-insensitively
-
Return Values
Always returns true.
See Also
- ArrayIterator::asort() - Sort entries by values
- ArrayIterator::natcasesort() - Sort entries naturally, case insensitive
- ArrayIterator::natsort() - Sort entries naturally
- ArrayIterator::uasort() - Sort with a user-defined comparison function and maintain index association
- ArrayIterator::uksort() - Sort by keys using a user-defined comparison function
- ksort() - Sort an array by key in ascending order
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